i have a 98 ls turbo and today all of a sudden a little bit of oil and smoke started to come out of it.... i do not have a filter on it... it is just open (part that is suppose to be redirected into the intake) i tried searching......


Modified by lilintegra25 at 3:18 PM 4/2/2007


Modified by lilintegra25 at 6:16 PM 4/3/2007

 

best case senario = bad pcv valve

worst case= rings or valve seals shot

 

hmmm.... would a catch can stop this?

 

Mine did this also after a night of beating on my car. It wound up being cracked ring lands on two cylinders. I bet if you did a compression test youd be low in 1 or 2 cylinders also,

 

your piston ringlands are probably shot. Do a leakdown.

 

checked the pcv valve.... that is working no problems there..... off to do a compression test......

 

make sure to hit us with an update!!

 

ringlands

 

only drive it on the weekends... has been boosted for about a month... with hondata s300 and 440 rc inectors and all.... the idle is fine..... no smoke out of exhuast.... pulled 3 or 4 times last night at 11 psi,,, still has great power.... everything feels the same....everything connected,, nothing came loose...... can it be b/c its running to rich???? can be be gas vapor???? doing compression test tomorrow and getting oil changed......


Modified by lilintegra25 at 9:24 PM 4/1/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lilintegra25 &raquo;</TD></TR><TR><TD CLASS="quote">only drive it on the weekends... has been boosted for about a month... with hondata s300 and 440 rc inectors and all.... the idle is fine..... no smoke out of exhuast.... pulled 3 or 4 times last night at 11 psi,,, still has great power.... everything feels the same....everything connected,, nothing came loose...... can it be b/c its running to rich???? can be be gas vapor???? doing compression test tomorrow and getting oil changed......


Modified by lilintegra25 at 9:24 PM 4/1/2007</TD></TR></TABLE>

It could be blow by, Ive seen that before. But just do a compression test or a leak down test, ether one will work. And if everything is good there then it was probibly blow by, and if it was just blow by and not your ring lands then you might want to think about a catch can set-up or a breather vent in the valve cover to relieve some pressure

 

its probably blow by. my car does the same thing.

 

Could be blow by

Could be PVC - Take it and clean it out
(excess smoke show at the track and it lead to just simple cleaning the pvc --&gt; the funny part is that it was new OEM one)

Rings --&gt; Not really a bad scenario since it just means it will be hard to pop the motor so more boost!!

 

where does your pcv valve connets to?? smoke out valve cover during idle is not a good thing. running open breather is the right thing to do.. do'nt connect it to catch can it will be more restrictive. do a compression test before driving it again

 

the pcv valve connects to the intake manifold.... how do i clean the pcv valve???


Modified by lilintegra25 at 3:06 PM 4/2/2007

 

mine did the same thing, if i ok off the oil cap and alot more came out

 

some does come out yea....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">where does your pcv valve connets to?? smoke out valve cover during idle is not a good thing. running open breather is the right thing to do.. do'nt connect it to catch can it will be more restrictive. do a compression test before driving it again</TD></TR></TABLE>

so connecting a catch can to the valve cover is a bad idea? there should just be a filter there?

 

A compression test will most likely hold your answer. I noticed what seemed to be increased "smoke"... let it go a few days convincing myself all was well. Finally did a CR test and only hit 85psi on #3. added a bit of oil down the plug hole and got 160psi. Rings or ring lands... in my case it was a split top ring and a shattered 2nd ring. Turns out #2 had a busted ring too... Thankfully the pistons were fine.

Good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lilintegra25 &raquo;</TD></TR><TR><TD CLASS="quote">the pcv valve connects to the intake manifold.... how do i clean the pcv valve???


Modified by lilintegra25 at 3:06 PM 4/2/2007</TD></TR></TABLE>

that will do it.. pcv valve isn't designed for boost. it could fail at certain point. allowing pressure into crankase

what to do? you could disconnect it or do it like me.. i use stock brake inline check valve, actually i use 2 just for safety right before manifold, then between them check valves and pcv i create another port to allow pressure exit from engine under wot. . basically i use a t fitting and place another check valve to allow pressure out to atmposhere, i do use 3/8" filter on that one as there will be vacuum under partial throttle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95dc2teg &raquo;</TD></TR><TR><TD CLASS="quote">

so connecting a catch can to the valve cover is a bad idea? there should just be a filter there?</TD></TR></TABLE>

not the best idea IMO.. lines/filters are restrictive if all you're trying to do is blow pressure out. i run my valve cover fitting open for ages now

 

possibly boosting past the rings into the engine. in turn blowing oil out the breather

 

They should call this place worstcasescenario-tech. What good is worrying about what it might be going to do when your car will more than likely continue to run fine? I get sucked into this sometimes. When my car was completely stock, oil would enter from the valve cover through the intake. The smoke is just vapor that you're going to notice even more since you have no filter on there and boost your car with a pcv valve that closes under boost. Where else is the vapor going to go?

 

Do a compression check, mine was smoking through breather once. Later found out ringland was craked on two seperate cylinders.

 

we have race engines that are in "perfect working order" that would fill catch cans/spew oil.... it wasnt until that we actually vented the crankcase properly, that the problem was solved.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lilintegra25 &raquo;</TD></TR><TR><TD CLASS="quote">i have a 98 ls turbo and today all of a sudden a little bit of oil and smoke started to come out of it.... i do not have a filter on it... it is just open (part that is suppose to be redirected into the intake) i tried searching......


Modified by lilintegra25 at 3:18 PM 4/2/2007</TD></TR></TABLE>

Unless you have a LOT of oil burning smell smoke coming out of the breathe rnipple on the valve cover then its not ringlands or rings. More then likely at 11 psi your blowing oil through the pcv. also there is a generous amount of crankcase pressure at 11 psi of boost so your going to see some oil coming out of that nipple. also your going to see some gasses coming out. your best bet IS to hook up a catch can. BUT the proper way to do so is to plug that stupid tiny nipple and have two minimum of -10an fittings welded to the front of the valve cover for breather lines to the catch can. -12an is much better. larger you go the better the air will be able to flow and not creat a vacuum and suck oil out of the motor and into your catch can.

OR you can just leave it and put a hose on the nipple draining into a oil bottole or somethign so it doesnt make a mess of your engine bay and still breathe as it is now