LS1 burning oil after WOT
12-28-2011, 12:37 PM
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LS1 burning oil after WOT so i have an LS1 with 40-50k miles, occasionally after a few hard pulls the car will start to leave clouds of oil smoke. i think it's blow-by, the plugs are wet with oil and there seems to be oil in the intake manifold.
example scenario: pull to top of 4th gear, clutch into neutral, come to stop, if i rev the motor to 4k i will get a nice puff of smoke and then it will go away until the next pull.
any reason my low mile LS1 is doing this? i was thinking a catch can or new PCV would fix it. i am new to LS1's and have never seen anything like this before on other motors i've worked on.
example scenario: pull to top of 4th gear, clutch into neutral, come to stop, if i rev the motor to 4k i will get a nice puff of smoke and then it will go away until the next pull.
any reason my low mile LS1 is doing this? i was thinking a catch can or new PCV would fix it. i am new to LS1's and have never seen anything like this before on other motors i've worked on.
12-28-2011, 04:55 PM
#2
These cars are notorious for oil in the intake due to a poor pcv system, GM attempted to address this problem with the ls6 style valley pcv system. If you have oil in the intake, YOU WILL BENEFIT from running a catch can. It is worth every penny, Keep the oil out of the intake, and your engine will be much better off. During Wot you are moving alot of air through the intake, If there is oil in it, then it will transfer to the chamber with the air, and then get burned with the air and fuel, which can cause smoke. A ton of us guys run catch cans, thats the reason. If your car is a 98 or 99 you have the worse pcv system. a ton of guys with the ls6 style still run catch cans. It really is a common issue on these engines. Hope this helps.
12-28-2011, 05:15 PM
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These cars are notorious for oil in the intake due to a poor pcv system, GM attempted to address this problem with the ls6 style valley pcv system. If you have oil in the intake, YOU WILL BENEFIT from running a catch can. It is worth every penny, Keep the oil out of the intake, and your engine will be much better off. During Wot you are moving alot of air through the intake, If there is oil in it, then it will transfer to the chamber with the air, and then get burned with the air and fuel, which can cause smoke. A ton of us guys run catch cans, thats the reason. If your car is a 98 or 99 you have the worse pcv system. a ton of guys with the ls6 style still run catch cans. It really is a common issue on these engines. Hope this helps.
I respect your experience and you always share good insightful knowledge
