carbon deposits on pistons
#1
carbon deposits on pistons
took my heads off today (comp replacement lifter install) and all of my pistons where scortched with HUGE carbon deposit, enough to raise the surface of the piston. the car only has 35k miles but has been ticking pretty bad for a couple of weeks. I suspected a lifter but not this. I really don't think thats normal, I've seen pics of LS1's apart with more miles and less sh*t in them. whats going on?
#2
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Does your engine use a lot of oil? We had the heads off my son's LS1 and the top of the pistons were pretty clean, just a light coating of carbon. You may want to try a catch can to keep the oil out of the intake track.
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check your valve guides on old SBC's they'll cause that. I just pulled an old 350 apart yesterday and it was the same way and the guides are worn to hell.
#6
thanks for the reply's.here's a couple pictures , i already cleaned off a lot of the build up from the pistons before these were taken....nevermind , pics are too big , i have to figure out how to make them smaller first..
Last edited by jaredm; 09-05-2005 at 08:13 PM.
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Originally Posted by Rudolph
Lots on mine, and when cam swap, i cleaned it up
I think that the catch can (mini air filter) is not working very good
I think that the catch can (mini air filter) is not working very good
I think you meant H & C swap...if not you did the cam a long, hard way
I agree, oiling buildup, and quench height is an issues. Dealing with a buddy that has been troubleshooting odd KR, and my first guess is Carbon deposits. Hate to pull it apart only to clean the pistons and chambers
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130,000 on the LS1 from my '97 Vette' when it was removed for rebuild. Very clean everywhere. Bottom end looked like new. Not much carbon on the pistons or chambers. Always ran Synthetic and changed often.
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Originally Posted by dame
wanna know how i keep my top end clean?
150 shot once a week
150 shot once a week
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Originally Posted by SSDoubleK
Gonna start using the synthetic oil. Anyway to smooth out those piston tops if your valve dented them a bit?
1) you can scotchbrite the high sides and smooth it out some.
OR
2) rent a valve relief cutter and cut them in deeper.
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Originally Posted by CAT3
I think you meant H & C swap...if not you did the cam a long, hard way
I agree, oiling buildup, and quench height is an issues. Dealing with a buddy that has been troubleshooting odd KR, and my first guess is Carbon deposits. Hate to pull it apart only to clean the pistons and chambers
I agree, oiling buildup, and quench height is an issues. Dealing with a buddy that has been troubleshooting odd KR, and my first guess is Carbon deposits. Hate to pull it apart only to clean the pistons and chambers