Re: good thing to clean out engine
 

Use a good detergent oil and an new oil filter, change the oil as soon
as the oil looks slightly dirty. If it is dirty in 100 miles, you know
you have a sludge issue. If it is still clean at 1000 miles, the enngine
has been taken care of. Takes longer but MUCH easier on an old engine
than dumping in any kind of solvent or additive.

abomb69 wrote:

> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

Re: good thing to clean out engine
 

Use a good detergent oil and an new oil filter, change the oil as soon
as the oil looks slightly dirty. If it is dirty in 100 miles, you know
you have a sludge issue. If it is still clean at 1000 miles, the enngine
has been taken care of. Takes longer but MUCH easier on an old engine
than dumping in any kind of solvent or additive.

abomb69 wrote:

> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

Re: good thing to clean out engine
 

Use a good detergent oil and an new oil filter, change the oil as soon
as the oil looks slightly dirty. If it is dirty in 100 miles, you know
you have a sludge issue. If it is still clean at 1000 miles, the enngine
has been taken care of. Takes longer but MUCH easier on an old engine
than dumping in any kind of solvent or additive.

abomb69 wrote:

> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

Re: good thing to clean out engine
 

When my son-in-law first tried Mobil Clean I was surprised when at 3k the
oil was as black as coal.


"RoyJ" <spamless@microsoft.net> wrote in message
news:TCYCh.4903$Jl.2141@newsread3.news.pas.earthli nk.net...
> Use a good detergent oil and an new oil filter, change the oil as soon as
> the oil looks slightly dirty. If it is dirty in 100 miles, you know you
> have a sludge issue. If it is still clean at 1000 miles, the enngine has
> been taken care of. Takes longer but MUCH easier on an old engine than
> dumping in any kind of solvent or additive.
>
> abomb69 wrote:
>
>> Anyone know of a good chemical to clean out and engine when you change
>> the oil?? besides just new oil....I have a 93 cherokee with 225k on it
>> and wanted to maybe get rid of some sludge build up inside.
>>
>>

Re: good thing to clean out engine
 

When my son-in-law first tried Mobil Clean I was surprised when at 3k the
oil was as black as coal.


"RoyJ" <spamless@microsoft.net> wrote in message
news:TCYCh.4903$Jl.2141@newsread3.news.pas.earthli nk.net...
> Use a good detergent oil and an new oil filter, change the oil as soon as
> the oil looks slightly dirty. If it is dirty in 100 miles, you know you
> have a sludge issue. If it is still clean at 1000 miles, the enngine has
> been taken care of. Takes longer but MUCH easier on an old engine than
> dumping in any kind of solvent or additive.
>
> abomb69 wrote:
>
>> Anyone know of a good chemical to clean out and engine when you change
>> the oil?? besides just new oil....I have a 93 cherokee with 225k on it
>> and wanted to maybe get rid of some sludge build up inside.
>>
>>

Re: good thing to clean out engine
 

When my son-in-law first tried Mobil Clean I was surprised when at 3k the
oil was as black as coal.


"RoyJ" <spamless@microsoft.net> wrote in message
news:TCYCh.4903$Jl.2141@newsread3.news.pas.earthli nk.net...
> Use a good detergent oil and an new oil filter, change the oil as soon as
> the oil looks slightly dirty. If it is dirty in 100 miles, you know you
> have a sludge issue. If it is still clean at 1000 miles, the enngine has
> been taken care of. Takes longer but MUCH easier on an old engine than
> dumping in any kind of solvent or additive.
>
> abomb69 wrote:
>
>> Anyone know of a good chemical to clean out and engine when you change
>> the oil?? besides just new oil....I have a 93 cherokee with 225k on it
>> and wanted to maybe get rid of some sludge build up inside.
>>
>>

Re: good thing to clean out engine
 

abomb69 wrote:
> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

I would first open the oil cap and have a close look at it and inside as
far as I could see. If the engine has sludge, usually some is under the
oil cap.

The second place to check, and this will show the slightest amount of
sludge buildup, is the CCV tube. I unhook it from the intake and see if
I can blow through it into the valve cover. If it still blows clear,
there is no sludge. If it is plugged, then some carb cleaner sprayed
into the tube with a ream from a wire or air blow to clear it is in order.

If this CCV tube plugs with sludge, then oil will start spitting into
the air filter. At this point I would think on using a cleaner in the
engine.

I prefer to use a pint of ATF into the oil about 100 miles before a
change. This seems to clean them out without being to harsh on them.

Some folks actually remove the valve cover to make sure they get all the
sludge out, but I wouldn't do this unless I couldn't keep that CCV tube
clear and then I would want to pull the oil pan too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: good thing to clean out engine
 

abomb69 wrote:
> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

I would first open the oil cap and have a close look at it and inside as
far as I could see. If the engine has sludge, usually some is under the
oil cap.

The second place to check, and this will show the slightest amount of
sludge buildup, is the CCV tube. I unhook it from the intake and see if
I can blow through it into the valve cover. If it still blows clear,
there is no sludge. If it is plugged, then some carb cleaner sprayed
into the tube with a ream from a wire or air blow to clear it is in order.

If this CCV tube plugs with sludge, then oil will start spitting into
the air filter. At this point I would think on using a cleaner in the
engine.

I prefer to use a pint of ATF into the oil about 100 miles before a
change. This seems to clean them out without being to harsh on them.

Some folks actually remove the valve cover to make sure they get all the
sludge out, but I wouldn't do this unless I couldn't keep that CCV tube
clear and then I would want to pull the oil pan too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: good thing to clean out engine
 

abomb69 wrote:
> Anyone know of a good chemical to clean out and engine when you change the
> oil?? besides just new oil....I have a 93 cherokee with 225k on it and
> wanted to maybe get rid of some sludge build up inside.
>
>
>

I would first open the oil cap and have a close look at it and inside as
far as I could see. If the engine has sludge, usually some is under the
oil cap.

The second place to check, and this will show the slightest amount of
sludge buildup, is the CCV tube. I unhook it from the intake and see if
I can blow through it into the valve cover. If it still blows clear,
there is no sludge. If it is plugged, then some carb cleaner sprayed
into the tube with a ream from a wire or air blow to clear it is in order.

If this CCV tube plugs with sludge, then oil will start spitting into
the air filter. At this point I would think on using a cleaner in the
engine.

I prefer to use a pint of ATF into the oil about 100 miles before a
change. This seems to clean them out without being to harsh on them.

Some folks actually remove the valve cover to make sure they get all the
sludge out, but I wouldn't do this unless I couldn't keep that CCV tube
clear and then I would want to pull the oil pan too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: good thing to clean out engine
 

On Tue, 20 Feb 2007, Earle Horton wrote:

> "abomb69" <abuse@verizon.net> wrote in message
> news:bxPCh.13982$gj4.964@newssvr14.news.prodigy.ne t...
>> Anyone know of a good chemical to clean out and engine when
>> you change the oil?? besides just new oil....I have a 93 cherokee
>> with 225k on it and wanted to maybe get rid of some sludge
>> build up inside.
>>
> What makes you think there is sludge inside? If there has been any kind of
> responsible maintenance, there probably isn't. If there is and you try to
> flush it with chemicals, you are going to loosen all that crud and get it
> into your oil pump, clog your filter, make the bypass open, and then it goes
> straight to your bearings. If you're serious about cleaning out the inside
> of the engine, then you have to remove the oil pan and the valve cover to do
> it right.
[snip]

I would worry that clearing out the varnish would loosen up all the oil
leaks.



--
"We began to realize, as we plowed on with the destruction of New Jersey,
that the extent of our American lunatic fringe had been underestimated."
Orson Wells on the reaction to the _War Of The Worlds_ broadcast.