Anyway to clean carbon build up? Is there any product available to do this?

Thanks,

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40044741.2F07BE69@sympatico.ca...
> Very few gauges are accurate or will read the same on the same engine.
>
> If they are all even, that's a good thing. Too high can mean carbon
> buildup.
>
> Normally carbon isn't a problem until you start to get spark knock or
> ping or until it starts dieseling or running on after the key is turned
> off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I just got a call from the shop where I took my jeep to have it
diagnosised
> > for engine "strength". The guy told me I have compression of 150 psi
per
> > cylinder with no variance between each cylinder. I'm thinking Great.
> > However, I looked up the specs in my FSM where they say I should have
> > between 120 to 140 per cylinder.
> >
> > Can I have too much compression and what would cause that? Could the
test
> > be done incorrectly which would present a higher number than it really
is?
> >
> > Thanks,
> >
> > Bill

 

Anyway to clean carbon build up? Is there any product available to do this?

Thanks,

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40044741.2F07BE69@sympatico.ca...
> Very few gauges are accurate or will read the same on the same engine.
>
> If they are all even, that's a good thing. Too high can mean carbon
> buildup.
>
> Normally carbon isn't a problem until you start to get spark knock or
> ping or until it starts dieseling or running on after the key is turned
> off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I just got a call from the shop where I took my jeep to have it
diagnosised
> > for engine "strength". The guy told me I have compression of 150 psi
per
> > cylinder with no variance between each cylinder. I'm thinking Great.
> > However, I looked up the specs in my FSM where they say I should have
> > between 120 to 140 per cylinder.
> >
> > Can I have too much compression and what would cause that? Could the
test
> > be done incorrectly which would present a higher number than it really
is?
> >
> > Thanks,
> >
> > Bill

 

Anyway to clean carbon build up? Is there any product available to do this?

Thanks,

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40044741.2F07BE69@sympatico.ca...
> Very few gauges are accurate or will read the same on the same engine.
>
> If they are all even, that's a good thing. Too high can mean carbon
> buildup.
>
> Normally carbon isn't a problem until you start to get spark knock or
> ping or until it starts dieseling or running on after the key is turned
> off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I just got a call from the shop where I took my jeep to have it
diagnosised
> > for engine "strength". The guy told me I have compression of 150 psi
per
> > cylinder with no variance between each cylinder. I'm thinking Great.
> > However, I looked up the specs in my FSM where they say I should have
> > between 120 to 140 per cylinder.
> >
> > Can I have too much compression and what would cause that? Could the
test
> > be done incorrectly which would present a higher number than it really
is?
> >
> > Thanks,
> >
> > Bill

 

I like to smoke out my neighbors just to **** one off and use a pint of
ATF poured very slowly down the throat of the carb to burn the carbon
away.

I get the engine hot and slowly pour it in while keeping the rpm up with
my hand on the throttle linkages. You don't want it to stall.

This method works excellently and makes them clean like new inside. I
have opened them up after. I use that as a prep before a head gasket
job too.

I have been told by lots of folks that a pint of water poured in the
same way will do the same job minus the smoke cloud. ATF does make one
serious cloud of smoke...

If it isn't pinging or dieseling, then a good hard day wheeling with
some high rpm or a hard highway run will clean them out good too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Anyway to clean carbon build up? Is there any product available to do this?
>
> Thanks,
>
> Bill
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40044741.2F07BE69@sympatico.ca...
> > Very few gauges are accurate or will read the same on the same engine.
> >
> > If they are all even, that's a good thing. Too high can mean carbon
> > buildup.
> >
> > Normally carbon isn't a problem until you start to get spark knock or
> > ping or until it starts dieseling or running on after the key is turned
> > off.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I just got a call from the shop where I took my jeep to have it
> diagnosised
> > > for engine "strength". The guy told me I have compression of 150 psi
> per
> > > cylinder with no variance between each cylinder. I'm thinking Great.
> > > However, I looked up the specs in my FSM where they say I should have
> > > between 120 to 140 per cylinder.
> > >
> > > Can I have too much compression and what would cause that? Could the
> test
> > > be done incorrectly which would present a higher number than it really
> is?
> > >
> > > Thanks,
> > >
> > > Bill

 

I like to smoke out my neighbors just to **** one off and use a pint of
ATF poured very slowly down the throat of the carb to burn the carbon
away.

I get the engine hot and slowly pour it in while keeping the rpm up with
my hand on the throttle linkages. You don't want it to stall.

This method works excellently and makes them clean like new inside. I
have opened them up after. I use that as a prep before a head gasket
job too.

I have been told by lots of folks that a pint of water poured in the
same way will do the same job minus the smoke cloud. ATF does make one
serious cloud of smoke...

If it isn't pinging or dieseling, then a good hard day wheeling with
some high rpm or a hard highway run will clean them out good too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Anyway to clean carbon build up? Is there any product available to do this?
>
> Thanks,
>
> Bill
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40044741.2F07BE69@sympatico.ca...
> > Very few gauges are accurate or will read the same on the same engine.
> >
> > If they are all even, that's a good thing. Too high can mean carbon
> > buildup.
> >
> > Normally carbon isn't a problem until you start to get spark knock or
> > ping or until it starts dieseling or running on after the key is turned
> > off.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I just got a call from the shop where I took my jeep to have it
> diagnosised
> > > for engine "strength". The guy told me I have compression of 150 psi
> per
> > > cylinder with no variance between each cylinder. I'm thinking Great.
> > > However, I looked up the specs in my FSM where they say I should have
> > > between 120 to 140 per cylinder.
> > >
> > > Can I have too much compression and what would cause that? Could the
> test
> > > be done incorrectly which would present a higher number than it really
> is?
> > >
> > > Thanks,
> > >
> > > Bill

 

I like to smoke out my neighbors just to **** one off and use a pint of
ATF poured very slowly down the throat of the carb to burn the carbon
away.

I get the engine hot and slowly pour it in while keeping the rpm up with
my hand on the throttle linkages. You don't want it to stall.

This method works excellently and makes them clean like new inside. I
have opened them up after. I use that as a prep before a head gasket
job too.

I have been told by lots of folks that a pint of water poured in the
same way will do the same job minus the smoke cloud. ATF does make one
serious cloud of smoke...

If it isn't pinging or dieseling, then a good hard day wheeling with
some high rpm or a hard highway run will clean them out good too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Anyway to clean carbon build up? Is there any product available to do this?
>
> Thanks,
>
> Bill
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40044741.2F07BE69@sympatico.ca...
> > Very few gauges are accurate or will read the same on the same engine.
> >
> > If they are all even, that's a good thing. Too high can mean carbon
> > buildup.
> >
> > Normally carbon isn't a problem until you start to get spark knock or
> > ping or until it starts dieseling or running on after the key is turned
> > off.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I just got a call from the shop where I took my jeep to have it
> diagnosised
> > > for engine "strength". The guy told me I have compression of 150 psi
> per
> > > cylinder with no variance between each cylinder. I'm thinking Great.
> > > However, I looked up the specs in my FSM where they say I should have
> > > between 120 to 140 per cylinder.
> > >
> > > Can I have too much compression and what would cause that? Could the
> test
> > > be done incorrectly which would present a higher number than it really
> is?
> > >
> > > Thanks,
> > >
> > > Bill

 

Carlo has is right. Unless the compression gauge you have has been
*calibrated* in a gauge lab such reading are always suspect. Its more
important to have similar pressures no matter what gauge youre using
..... rather than the 'number'.

In article <CoOdnV7Z2P8F25ndRVn-iQ@comcast.com>, Carlo
<carlo.jr@comcast.net> wrote:

> I can only give the advice of an advanced rookie............
> I believe that some compression can be due to carbon build up on the top of
> the piston or in the combustion chamber of the head - but I think that most
> of the difference is probably in the compression gauge. I doubt if any 2
> gauges will be that close, especially after banging around in a tool box for
> 15 to 20 years.
> I would still ask around - or wait for more posts from others - but the "no
> variance" part sounds good. I would think that if there was a problem, such
> as carbon build up, it probably would not be even across all cylinders.
> Other possibilities might be a milled head, thin head gasket, different
> pistons, etc.
> how many miles on the engine ? & what has been done to it ?

 

Carlo has is right. Unless the compression gauge you have has been
*calibrated* in a gauge lab such reading are always suspect. Its more
important to have similar pressures no matter what gauge youre using
..... rather than the 'number'.

In article <CoOdnV7Z2P8F25ndRVn-iQ@comcast.com>, Carlo
<carlo.jr@comcast.net> wrote:

> I can only give the advice of an advanced rookie............
> I believe that some compression can be due to carbon build up on the top of
> the piston or in the combustion chamber of the head - but I think that most
> of the difference is probably in the compression gauge. I doubt if any 2
> gauges will be that close, especially after banging around in a tool box for
> 15 to 20 years.
> I would still ask around - or wait for more posts from others - but the "no
> variance" part sounds good. I would think that if there was a problem, such
> as carbon build up, it probably would not be even across all cylinders.
> Other possibilities might be a milled head, thin head gasket, different
> pistons, etc.
> how many miles on the engine ? & what has been done to it ?

 

Carlo has is right. Unless the compression gauge you have has been
*calibrated* in a gauge lab such reading are always suspect. Its more
important to have similar pressures no matter what gauge youre using
..... rather than the 'number'.

In article <CoOdnV7Z2P8F25ndRVn-iQ@comcast.com>, Carlo
<carlo.jr@comcast.net> wrote:

> I can only give the advice of an advanced rookie............
> I believe that some compression can be due to carbon build up on the top of
> the piston or in the combustion chamber of the head - but I think that most
> of the difference is probably in the compression gauge. I doubt if any 2
> gauges will be that close, especially after banging around in a tool box for
> 15 to 20 years.
> I would still ask around - or wait for more posts from others - but the "no
> variance" part sounds good. I would think that if there was a problem, such
> as carbon build up, it probably would not be even across all cylinders.
> Other possibilities might be a milled head, thin head gasket, different
> pistons, etc.
> how many miles on the engine ? & what has been done to it ?

 

that can really screw up the o2 sensor ya? I've done the water thing a few
times.
Nick

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40045023.D6A67498@sympatico.ca...
> I like to smoke out my neighbors just to **** one off and use a pint of
> ATF poured very slowly down the throat of the carb to burn the carbon
> away.
>
> I get the engine hot and slowly pour it in while keeping the rpm up with
> my hand on the throttle linkages. You don't want it to stall.
>
> This method works excellently and makes them clean like new inside. I
> have opened them up after. I use that as a prep before a head gasket
> job too.
>
> I have been told by lots of folks that a pint of water poured in the
> same way will do the same job minus the smoke cloud. ATF does make one
> serious cloud of smoke...
>
> If it isn't pinging or dieseling, then a good hard day wheeling with
> some high rpm or a hard highway run will clean them out good too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > Anyway to clean carbon build up? Is there any product available to do
this?
> >
> > Thanks,
> >
> > Bill
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:40044741.2F07BE69@sympatico.ca...
> > > Very few gauges are accurate or will read the same on the same engine.
> > >
> > > If they are all even, that's a good thing. Too high can mean carbon
> > > buildup.
> > >
> > > Normally carbon isn't a problem until you start to get spark knock or
> > > ping or until it starts dieseling or running on after the key is
turned
> > > off.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > William Oliveri wrote:
> > > >
> > > > I just got a call from the shop where I took my jeep to have it
> > diagnosised
> > > > for engine "strength". The guy told me I have compression of 150
psi
> > per
> > > > cylinder with no variance between each cylinder. I'm thinking
Great.
> > > > However, I looked up the specs in my FSM where they say I should
have
> > > > between 120 to 140 per cylinder.
> > > >
> > > > Can I have too much compression and what would cause that? Could
the
> > test
> > > > be done incorrectly which would present a higher number than it
really
> > is?
> > > >
> > > > Thanks,
> > > >
> > > > Bill