PCV sucking oil, blowing smoke under boost

[turbo J]

Hello everyone,

I have a newly built motor with maybe 25 miles. Current issue is it blows tons of smoke through the exhaust under just a little boost, I haven't got on it hard yet. I noticed the pcv is sucking oil when I pulled the hose from the pcv to the vacuum block it was coated in oil, it has after market valve covers, with push in breathers. My previous motor did the same thing, thinking the previous motor was a bad build, had this one done at a local repitable builder. Any ideas?

Thanks.

 

[bogies87]

What kind of PCV do you have in the car?? Did you check to make sure it seals when blowing back through it?? I had one doing the same thing and ended up buying a one way check valve from US plastics. They have a 1lb crack pressure and seal everything to make sure its not sucking oil.

 

[TurboBuRick]

The pcv can't suck oil under boost.

Read the plugs first. See if they are oily.

 

[BRAD_PADGETT]

Hello everyone,

I have a newly built motor with maybe 25 miles. Current issue is it blows tons of smoke through the exhaust under just a little boost, I haven't got on it hard yet. I noticed the pcv is sucking oil when I pulled the hose from the pcv to the vacuum block it was coated in oil, it has after market valve covers, with push in breathers. My previous motor did the same thing, thinking the previous motor was a bad build, had this one done at a local repitable builder. Any ideas?

Thanks.

Think about it. Put a breather on the PCV valve line and vent it. Why put that the PCV valve crap through your motor- it causes knock. Brad

 

[BEATAV8]

Assuming it blowing blue smoke here.... and not black smoke.

delete the PCV. Cap it off plug it up whatever.

Run open breathers on the valve covers. Make sure the breather grommets are opened up. No restrictions.

Check the oil level. Is the engine overfilled?

 

[sailbrd]

I just started running a crankcase evac kit on my boosted 455 that was doing the same thing. Seems to help.

 

[turbo J]

Thanks everyone for your input. I found the issue! I rumiged through a box of old GN parts I had and found an origanal A/C Rodchester PCV, light grey in color. Also I was running rubber baffeled gromets I opened them up and presto no more smoke. Thanks LeRoy!!!!!!