JeepinHank
08-25-2004, 03:51 PM
This is the Moparman (from JU) method of cleaning out carbon build-up from your engine. I found the JU search useless, but, luckily I made a copy and saved it many moons ago. Enjoy:
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Mopar Combustion Chamber Cleaner
(Cleaning carbon build-up from engine)
Parts Needed:
2 cans of Mopar Combustion Chamber Cleaner (available at local Chrysler dealer...7 bucks a can)
New set of spark plugs(optional)
Correct amount of new engine oil
New oil filter
Toothbrush
Clean rag
Long thin tube(I bought a funnel that came with a long thin tube connected to it at Pep Boys...will come in handy in step 2)
NOTE: Total time should be 45 to 60 minutes. This includes waiting time.
I recommend doing this at the time of your next oil change only because I advise changing engine oil and filter afterwards.
Also, before doing anything, a good idea is to first loosen up the spark plugs and then re-tighten them back ONLY to a snug fit(not too tight). This will make life a lot easier when removing the spark plugs in step 2.
1). Cleaning off carbon from combustion chamber and valves:
Start the engine and let it idle or take the Jeep out for a drive until it reaches normal operating temperature(engine should be hot). Turn off engine. Remove the air hose from the throttle body. With engine OFF, spray some Mopar CCC onto throttle plate(not too much) and linkage and clean off carbon using a small tooth brush(make sure you clean the bottom of the throttle plate also). Wipe off dissolved carbon with clean rag……should shine like new. Start the engine(make sure it's hot) and spray the entire can of Mopar CCC into the throttle body….the intake manifold vacuum will suck it in. You may have smoke coming out of the tailpipe during this, and your idle may drop or even try to stall…..this is normal. It’s important NOT to rev the engine during this but to keep a steady idle around 1000-1200 RPM by controlling the idle with your hand on the throttle body spring pack(a glove may come in handy since the throttle spring pack may be hot). When can is empty, shut off the engine immediately. Reconnect the air hose to the throttle body. Proceed to step 2.
2). De-gumming the piston rings:
Remove the spark plugs and spray a can of Mopar CCC(divided evenly) into the cylinders through the open spark plug holes. If you have trouble spraying into one of the plug holes, try using a funnel or small tube to guide the cleaner into the plug hole or else try to aim as best you could. Reinstall plugs then give the engine a couple of quick cranks to mix up the cleaner(don't try to start the engine). Wait 20-30 minutes then remove the spark plugs. Crank the engine over a couple of times again to eject any excess cleaner out of the open plug holes to help prevent possible hydro-lock. Might be a bit messy but important. Reinstall original plugs. Start the engine(may need to fire it up a few times) and DO NOT let it just sit and idle or else the carbon will just re-cook in your engine. Rather, rev the engine to 3000-3500 RPM's 10-15 times. Again, don't be surprised if you see a lot of smoke...it's normal. Take the Jeep out and drive the heck out of it for a few minutes. This will do a good job of cleaning out any excess carbon from the engine. Oh, and of course rids the neighborhood of any bugs or mosquitoes if smoke happens to still flow out your tailpipes...that's the best part.
3). Install new spark plugs if you decided to get a new set. Change engine oil and filter since the cleaner may have passed by the piston rings.
*Result...Clean throttle body, intake manifold, valves, combustion chamber, piston and piston rings.
*Bonus*...NO MORE PINGING.
__________________________________________________ __________
Mopar Combustion Chamber Cleaner
(Cleaning carbon build-up from engine)
Parts Needed:
2 cans of Mopar Combustion Chamber Cleaner (available at local Chrysler dealer...7 bucks a can)
New set of spark plugs(optional)
Correct amount of new engine oil
New oil filter
Toothbrush
Clean rag
Long thin tube(I bought a funnel that came with a long thin tube connected to it at Pep Boys...will come in handy in step 2)
NOTE: Total time should be 45 to 60 minutes. This includes waiting time.
I recommend doing this at the time of your next oil change only because I advise changing engine oil and filter afterwards.
Also, before doing anything, a good idea is to first loosen up the spark plugs and then re-tighten them back ONLY to a snug fit(not too tight). This will make life a lot easier when removing the spark plugs in step 2.
1). Cleaning off carbon from combustion chamber and valves:
Start the engine and let it idle or take the Jeep out for a drive until it reaches normal operating temperature(engine should be hot). Turn off engine. Remove the air hose from the throttle body. With engine OFF, spray some Mopar CCC onto throttle plate(not too much) and linkage and clean off carbon using a small tooth brush(make sure you clean the bottom of the throttle plate also). Wipe off dissolved carbon with clean rag……should shine like new. Start the engine(make sure it's hot) and spray the entire can of Mopar CCC into the throttle body….the intake manifold vacuum will suck it in. You may have smoke coming out of the tailpipe during this, and your idle may drop or even try to stall…..this is normal. It’s important NOT to rev the engine during this but to keep a steady idle around 1000-1200 RPM by controlling the idle with your hand on the throttle body spring pack(a glove may come in handy since the throttle spring pack may be hot). When can is empty, shut off the engine immediately. Reconnect the air hose to the throttle body. Proceed to step 2.
2). De-gumming the piston rings:
Remove the spark plugs and spray a can of Mopar CCC(divided evenly) into the cylinders through the open spark plug holes. If you have trouble spraying into one of the plug holes, try using a funnel or small tube to guide the cleaner into the plug hole or else try to aim as best you could. Reinstall plugs then give the engine a couple of quick cranks to mix up the cleaner(don't try to start the engine). Wait 20-30 minutes then remove the spark plugs. Crank the engine over a couple of times again to eject any excess cleaner out of the open plug holes to help prevent possible hydro-lock. Might be a bit messy but important. Reinstall original plugs. Start the engine(may need to fire it up a few times) and DO NOT let it just sit and idle or else the carbon will just re-cook in your engine. Rather, rev the engine to 3000-3500 RPM's 10-15 times. Again, don't be surprised if you see a lot of smoke...it's normal. Take the Jeep out and drive the heck out of it for a few minutes. This will do a good job of cleaning out any excess carbon from the engine. Oh, and of course rids the neighborhood of any bugs or mosquitoes if smoke happens to still flow out your tailpipes...that's the best part.
3). Install new spark plugs if you decided to get a new set. Change engine oil and filter since the cleaner may have passed by the piston rings.
*Result...Clean throttle body, intake manifold, valves, combustion chamber, piston and piston rings.
*Bonus*...NO MORE PINGING.