Rebuilt engine blowby

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Jul 16, 2017 | 12:43 PM

SF 1HOTLS1

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Rebuilt engine blowby

So I just put in a fresh rebuilt ls6 with wiseco pistons and scat rods. Put 500 miles on with non synthetic oil. Get to the dyno dunk and after a few pulls I see oil out the breather and smoke out of it also. What do you guys think.

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Jul 16, 2017 | 03:46 PM

farmington

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From: Little River SC

Always break a motor in with conventional oil. What you have isn't looking good.

Jul 16, 2017 | 06:11 PM

G Atsma

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From: Central Cal.

He is; he said NON-synthetic oil. Right about the situation though....

Jul 16, 2017 | 07:47 PM

moekluse

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From: Nc

Do a compression/leak down test. What did you gap your rings to?

Jul 16, 2017 | 08:28 PM

handyandy496

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From: florida

I'm a fan of conventional oil as well if its a good one. You can google up all sorts of studies done on all of them. I would be more concerned on my machining and fitment specs in respect to piston to wall and rings. I don't like going back into a new build at 500 miles but I have done it just for piece of mind.
Might be somethin as simple as that type of breather and where it is. The breathers I have seen are away from the covers on the catch can.

Last edited by handyandy496; Jul 16, 2017 at 09:06 PM.

Jul 17, 2017 | 06:40 AM

ddnspider

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From: FL

Smoke is normal, but can you give more info of "oil out the breather"?

Jul 17, 2017 | 11:08 AM