Test you troubleshooting skills
02-05-2004, 01:17 PM
#21
On The Tree
I'm really surprised that nobody has done an exhaust based crancase evacuation system like you see on the big drag cars......
Good idea about the air pump too!
Good idea about the air pump too!
02-05-2004, 01:56 PM
#23
TECH Senior Member
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Originally Posted by mbaskett
Haven't looked at the video yet, but based on your symptoms and when they occur, it's because you're pulling oil through the PCV system when you have alot of vacuum in the intake (i.e. deceleration, and WOT) Either a simple catch can or a switch to the LS6 style PCV system should help alleviate the problem.
It's caused by two things happening. 1. at WOT and decel after WOT, you aggitate (for a better lack of words) the oil in the top of the motor, around the rockers, causing alot of it to become airborn and some atomize. 2. At those same conditions, you're pulling alot of vacuum, and are then pulling all that aggitated oil through the PCV system, since it draws from the valve covers and the PCV valve (actually the whole system) sits sideways, it's not helping to stop the oil from making it's way into the intake.
Hope this helps!
Matt
It's caused by two things happening. 1. at WOT and decel after WOT, you aggitate (for a better lack of words) the oil in the top of the motor, around the rockers, causing alot of it to become airborn and some atomize. 2. At those same conditions, you're pulling alot of vacuum, and are then pulling all that aggitated oil through the PCV system, since it draws from the valve covers and the PCV valve (actually the whole system) sits sideways, it's not helping to stop the oil from making it's way into the intake.
Hope this helps!
Matt
That is interesting about the MACs I have never heard of that before. I run them and do not have any noticable smoking.
One thing about the MAC's is the air pump tubes sometimes causing check valve problems through the AIR system. Might want to use block off plates or "restrictor" plates.
