Jeep 4.0 litre oil pressure
08-27-2005, 06:25 PM
#1
Guest
Posts: n/a
Jeep 4.0 litre oil pressure
My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
pressure when hot. Always greater than 3 bar when cold, but can drop
to 1 bar when hot. Oil was clean and less than 4k old but I changed
the oil and filter (or the local garage did), but with no change.
Still low when hot, and often doesn't quite get to 3 bars at cruising
speed when hot either. I don't know the oil used, but it was Castrol,
and probably a 10W40. I would normally blame thinning or old oil, but
this is unlikely to be the case. I'm a careful driver, never over
revving when cold, and treating it reasonably gently, especially when
towing.
Is the failing pressure sender fault as often posted here likely to be
a problem, or is there another likely other source?
Car has full service history and one previous owner who I've spoken
to. He reports that he always had it serviced regularly whether the
mileage was due a service or not, hence the book is stamped to 78k
with only 53k when I bought it.
--
Regards,
Danny
http://www.gaggia-espresso.com (a purely hobby site)
http://www.dannyscoffee.com (UK advert for my mobile espresso service)
http://www.malabargold.co.uk (UK/European online ordering for Malabar
Gold blend)
swap Z for above characters in email address to reply
pressure when hot. Always greater than 3 bar when cold, but can drop
to 1 bar when hot. Oil was clean and less than 4k old but I changed
the oil and filter (or the local garage did), but with no change.
Still low when hot, and often doesn't quite get to 3 bars at cruising
speed when hot either. I don't know the oil used, but it was Castrol,
and probably a 10W40. I would normally blame thinning or old oil, but
this is unlikely to be the case. I'm a careful driver, never over
revving when cold, and treating it reasonably gently, especially when
towing.
Is the failing pressure sender fault as often posted here likely to be
a problem, or is there another likely other source?
Car has full service history and one previous owner who I've spoken
to. He reports that he always had it serviced regularly whether the
mileage was due a service or not, hence the book is stamped to 78k
with only 53k when I bought it.
--
Regards,
Danny
http://www.gaggia-espresso.com (a purely hobby site)
http://www.dannyscoffee.com (UK advert for my mobile espresso service)
http://www.malabargold.co.uk (UK/European online ordering for Malabar
Gold blend)
swap Z for above characters in email address to reply
08-27-2005, 06:28 PM
#2
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
The pressure sender certainly can be removed and tested by a cal
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
08-27-2005, 06:28 PM
#3
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
The pressure sender certainly can be removed and tested by a cal
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
08-27-2005, 06:28 PM
#4
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
The pressure sender certainly can be removed and tested by a cal
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
08-27-2005, 06:28 PM
#5
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
The pressure sender certainly can be removed and tested by a cal
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
fixture, which is not something automotive shops have, though it's
easily built. You need an air source, a valve and a gauge-your air
conditioning manifold gauge set will work OK. Just need the fitting.
If the pressure sender is ok, you probably have an oil pump or
pressure relief issue.
08-27-2005, 06:36 PM
#6
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
Could be your oil filter. Fram filters are reported to cause this problem.
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
08-27-2005, 06:36 PM
#7
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
Could be your oil filter. Fram filters are reported to cause this problem.
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
08-27-2005, 06:36 PM
#8
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
Could be your oil filter. Fram filters are reported to cause this problem.
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
08-27-2005, 06:36 PM
#9
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
Could be your oil filter. Fram filters are reported to cause this problem.
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
Purolater filters are supposed to be good.
JoBo
"Danny" <danny@nospam.gaggia-espresso.com> wrote in message
news:3nc6rhFs1anU1@individual.net...
> My 1997 Cherokee 4l (with 54k on the clock) started to have lower oil
> pressure when hot. Always greater than 3 bar when cold, but can drop to 1
> bar when hot. Oil was clean and less than 4k old but I changed the oil
> and filter (or the local garage did), but with no change. Still low when
> hot, and often doesn't quite get to 3 bars at cruising speed when hot
> either. I don't know the oil used, but it was Castrol, and probably a
> 10W40. I would normally blame thinning or old oil, but this is unlikely
> to be the case. I'm a careful driver, never over revving when cold, and
> treating it reasonably gently, especially when towing.
>
> Is the failing pressure sender fault as often posted here likely to be a
> problem, or is there another likely other source?
>
> Car has full service history and one previous owner who I've spoken to.
> He reports that he always had it serviced regularly whether the mileage
> was due a service or not, hence the book is stamped to 78k with only 53k
> when I bought it.
>
> --
> Regards,
> Danny
>
> http://www.gaggia-espresso.com (a purely hobby site)
> http://www.dannyscoffee.com (UK advert for my mobile espresso service)
> http://www.malabargold.co.uk (UK/European online ordering for Malabar Gold
> blend)
> swap Z for above characters in email address to reply
>
08-27-2005, 07:10 PM
#10
Guest
Posts: n/a
Re: Jeep 4.0 litre oil pressure
Jo Bo wrote:
> Could be your oil filter. Fram filters are reported to cause this problem.
> Purolater filters are supposed to be good.
Thanks, I'll check the filter. If I get a genuine filter can I change
it with the oil int he vehicle still...Only had new oil a couple of
weeks ago...
--
Regards,
Danny
http://www.gaggia-espresso.com (a purely hobby site)
http://www.dannyscoffee.com (UK advert for my mobile espresso service)
http://www.malabargold.co.uk (UK/European online ordering for Malabar
Gold blend)
swap Z for above characters in email address to reply
> Could be your oil filter. Fram filters are reported to cause this problem.
> Purolater filters are supposed to be good.
Thanks, I'll check the filter. If I get a genuine filter can I change
it with the oil int he vehicle still...Only had new oil a couple of
weeks ago...
--
Regards,
Danny
http://www.gaggia-espresso.com (a purely hobby site)
http://www.dannyscoffee.com (UK advert for my mobile espresso service)
http://www.malabargold.co.uk (UK/European online ordering for Malabar
Gold blend)
swap Z for above characters in email address to reply