97 4cyc oil pressure!!
07-12-2005, 11:48 AM
#1
Guest
Posts: n/a
97 4cyc oil pressure!!
Hi!
I've read many posts here about the lousy oil sending units in these jeeps.
Well, dropping off to zero is really scary, so I decided to attach a
mechanical oil pressure gauge to determine what is really going on with this
pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
when hot, it normally hovers around 30 at highway speeds, and will drop to
zero most often at idle. The mechanical gauge never shows it dropping to
zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
idle is acceptable.
I know the possible causes are oil pump, air leak at pick-up tube, perhaps
dirty screen, and bearings. This engine has 110,000 miles on it, with no
unusual engine noises that would maybe indicate bearings. It really doesn't
sound any different than it did 3 or 4 years ago.. Sometimes I hear what
sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
ideas??
cal
I've read many posts here about the lousy oil sending units in these jeeps.
Well, dropping off to zero is really scary, so I decided to attach a
mechanical oil pressure gauge to determine what is really going on with this
pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
when hot, it normally hovers around 30 at highway speeds, and will drop to
zero most often at idle. The mechanical gauge never shows it dropping to
zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
idle is acceptable.
I know the possible causes are oil pump, air leak at pick-up tube, perhaps
dirty screen, and bearings. This engine has 110,000 miles on it, with no
unusual engine noises that would maybe indicate bearings. It really doesn't
sound any different than it did 3 or 4 years ago.. Sometimes I hear what
sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
ideas??
cal
07-12-2005, 01:07 PM
#2
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I would just keep fresh oil and filters in it and realize it is showing
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
07-12-2005, 01:07 PM
#3
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I would just keep fresh oil and filters in it and realize it is showing
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
07-12-2005, 01:07 PM
#4
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I would just keep fresh oil and filters in it and realize it is showing
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
07-12-2005, 01:07 PM
#5
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I would just keep fresh oil and filters in it and realize it is showing
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
it's age. The only real fix is a rebuild.
Fresh oil does wonders top keeping the pressure up, when mine starts to
drop when hot, I know it is time for a change.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Cal wrote:
>
> Hi!
>
> I've read many posts here about the lousy oil sending units in these jeeps.
> Well, dropping off to zero is really scary, so I decided to attach a
> mechanical oil pressure gauge to determine what is really going on with this
> pressure. When cold, this engine has around 30-40 lbs pressure at idle, but
> when hot, it normally hovers around 30 at highway speeds, and will drop to
> zero most often at idle. The mechanical gauge never shows it dropping to
> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
> idle is acceptable.
> I know the possible causes are oil pump, air leak at pick-up tube, perhaps
> dirty screen, and bearings. This engine has 110,000 miles on it, with no
> unusual engine noises that would maybe indicate bearings. It really doesn't
> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
> sounds kinda like a valve lifter, or maybe just common cylinder noise. Any
> ideas??
>
> cal
07-12-2005, 01:32 PM
#6
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
You can also use heavier weight oil to prop up the pressure readings.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
07-12-2005, 01:32 PM
#7
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
You can also use heavier weight oil to prop up the pressure readings.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
07-12-2005, 01:32 PM
#8
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
You can also use heavier weight oil to prop up the pressure readings.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
07-12-2005, 01:32 PM
#9
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
You can also use heavier weight oil to prop up the pressure readings.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42D3F8E8.AC8BA3E3@sympatico.ca...
>I would just keep fresh oil and filters in it and realize it is showing
> it's age. The only real fix is a rebuild.
>
> Fresh oil does wonders top keeping the pressure up, when mine starts to
> drop when hot, I know it is time for a change.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
>>
>> Hi!
>>
>> I've read many posts here about the lousy oil sending units in these
>> jeeps.
>> Well, dropping off to zero is really scary, so I decided to attach a
>> mechanical oil pressure gauge to determine what is really going on with
>> this
>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>> but
>> when hot, it normally hovers around 30 at highway speeds, and will drop
>> to
>> zero most often at idle. The mechanical gauge never shows it dropping to
>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs at
>> idle is acceptable.
>> I know the possible causes are oil pump, air leak at pick-up tube,
>> perhaps
>> dirty screen, and bearings. This engine has 110,000 miles on it, with no
>> unusual engine noises that would maybe indicate bearings. It really
>> doesn't
>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>> Any
>> ideas??
>>
>> cal
07-12-2005, 02:00 PM
#10
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
You can but you will cause further wear of the oil pump or failure all
together. Dodge Rams had issues with oil pumps failing a an extreme high
rate and after all said and done it was discovered that the owners were
using 20w50 oil on 99% of the failures. Thicker is not better, nor does it
protect better than a thinner oil. 5w30 and 10w30 oils provide better
viscosity and more wear protection in vehicles that specify them. Heavy
oils such as 10w40 or 20w50 in vehicles that do not specify the heavy weight
oil will cause damage to the oil pump. As Mike said just change your oil.
--
Coasty
SEMPAR PARATUS
(ALWAYS READY)
Remove The SPOOGE To Reply
"BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
> You can also use heavier weight oil to prop up the pressure readings.
>
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>>I would just keep fresh oil and filters in it and realize it is showing
>> it's age. The only real fix is a rebuild.
>>
>> Fresh oil does wonders top keeping the pressure up, when mine starts to
>> drop when hot, I know it is time for a change.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Cal wrote:
>>>
>>> Hi!
>>>
>>> I've read many posts here about the lousy oil sending units in these
>>> jeeps.
>>> Well, dropping off to zero is really scary, so I decided to attach a
>>> mechanical oil pressure gauge to determine what is really going on with
>>> this
>>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>>> but
>>> when hot, it normally hovers around 30 at highway speeds, and will drop
>>> to
>>> zero most often at idle. The mechanical gauge never shows it dropping
>>> to
>>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs
>>> at
>>> idle is acceptable.
>>> I know the possible causes are oil pump, air leak at pick-up tube,
>>> perhaps
>>> dirty screen, and bearings. This engine has 110,000 miles on it, with
>>> no
>>> unusual engine noises that would maybe indicate bearings. It really
>>> doesn't
>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>>> Any
>>> ideas??
>>>
>>> cal
>
>
together. Dodge Rams had issues with oil pumps failing a an extreme high
rate and after all said and done it was discovered that the owners were
using 20w50 oil on 99% of the failures. Thicker is not better, nor does it
protect better than a thinner oil. 5w30 and 10w30 oils provide better
viscosity and more wear protection in vehicles that specify them. Heavy
oils such as 10w40 or 20w50 in vehicles that do not specify the heavy weight
oil will cause damage to the oil pump. As Mike said just change your oil.
--
Coasty
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"BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
> You can also use heavier weight oil to prop up the pressure readings.
>
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>>I would just keep fresh oil and filters in it and realize it is showing
>> it's age. The only real fix is a rebuild.
>>
>> Fresh oil does wonders top keeping the pressure up, when mine starts to
>> drop when hot, I know it is time for a change.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Cal wrote:
>>>
>>> Hi!
>>>
>>> I've read many posts here about the lousy oil sending units in these
>>> jeeps.
>>> Well, dropping off to zero is really scary, so I decided to attach a
>>> mechanical oil pressure gauge to determine what is really going on with
>>> this
>>> pressure. When cold, this engine has around 30-40 lbs pressure at idle,
>>> but
>>> when hot, it normally hovers around 30 at highway speeds, and will drop
>>> to
>>> zero most often at idle. The mechanical gauge never shows it dropping
>>> to
>>> zero, but to 9 or 10 lbs at idle. The owners manual states that 13lbs
>>> at
>>> idle is acceptable.
>>> I know the possible causes are oil pump, air leak at pick-up tube,
>>> perhaps
>>> dirty screen, and bearings. This engine has 110,000 miles on it, with
>>> no
>>> unusual engine noises that would maybe indicate bearings. It really
>>> doesn't
>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear what
>>> sounds kinda like a valve lifter, or maybe just common cylinder noise.
>>> Any
>>> ideas??
>>>
>>> cal
>
>
