sr20 getting blow by. have catch can..

[LJBS13]

i searched and cant find any good threads on blowby solutions.
i got a redtop sr20det all stock minus intake exhaust and fmic.
when i hit full boost say on the freeway or while drifting i will look back and my car smokes like a freight train. white smoke. i put a catch can hooked it up properly and its not getting blow by into the can at all. so im thinking the pcv valve? i want to know if anyone had this problem.? should i block off the pcv? or get a new one or?

[Sileighty_85]

white smoke?

Might wanna check ur coolant level

white smoke usually means a blown head gasket

[SR20Driftking4lyf]

white smoke?

Might wanna check ur coolant level

white smoke usually means a blown head gasket

Agreed^^^^I dont think this is a blow by issue, could also maybe be your t25 taking a dump. I would try to trace where you are burning coolant from.....

[Drifting-pedobear]

i agree.
oil doesnt burn white.
ususally black.

get tested for a BHG stat.

[KiLLeR2001]

I have same issue, starting to think its my turbo taking a dump. Whenever I floor it white smoke will come out and sometimes at idle the car will start smoking white... Car never overheats and it has a solid idle. Compression is 140psi across the board

[Sileighty_85]

blah...

Coolant burns white
Oil burns blue
Fuel burn black (rich condition)

Coolant WILL NOT burn through the turbo, there is no seals for coolant to leak in the turbo

[LJBS13]

my coolant levels never drop. car never overheats and no coolant in overflow tank. also it only smokes when im on it for a while, never at idle. say im drifting and im coming up on my last turn ill be on wide open throttle at full boost after the turn on the straight ill notice it smoking i put the car in neutral and give it a rev and a big cloud of smoke will come out then after i rev a couple more times it goes completely away.

[drag113]

i agree.
oil doesnt burn white.
ususally black.

get tested for a BHG stat.

wronggggggggggggggg

[Csomme]

i agree.
oil doesnt burn white.
ususally black.

get tested for a BHG stat.

Gahhhh. Getting the basics wrong.

[KiLLeR2001]

Yeah my car only throws out white smoke when I floor it in high rpm range. It only smokes on idle sometimes.

[LJBS13]

anyone know if this could be the pcv valve?

[rioredstang]

I would say your turbo seals are going south. PCV valve will suck oil out of the engine at idle. You say you're at high rpm at full boost, that means you have pressure on the pcv system not vacuum.

Oil can burn different colors depending on what type of oil. Synthetic or petroleum base. When oil is burnt as a part of combustion you will see more blue smoke. Oil that is leaked in the exhaust past the combustion chamber usually will appear white. Also the amount of oil leaking into the exhaust will change the color.

[JDMRIDDAZ]

turbo seals.....if coolant doesnt change or overheat
then its the turbo seals..pull off maf pipe and check for in and out shaft play

[Rabboni]

Do a leak down test to be positive that your engine and head gasket are in good condition, then get back to us. Oil doesnt burn white, coolant does.

[LJBS13]

so oil shot out of my dipstick the other day. when i was at high rpm.

[nismoman]

I'd suggest you take it easy on the motor till you figure it out. Unless you are trying to blow it up. Do a compression test or leak down test. Something is really wrong. Sounds like you might be pressurizing the crank case.

[JDMRIDDAZ]

ok i read a little more if u have like a eBay intake mani
and the pcv is hooked up....
under boost
the pcv will flow oil into intake just dont plug it in
and plug intake..it happened to my boy and thats wat he did and its straight
if oil is cumming out of dipstick under high boost
the o ring on didpstick fails..this happened to me i put sum blk/tape once around dipstick and the issue stopped...no more puffs of smoke
if u undo this things then if it still smokes it for sure turbo seals...
it would never be the Hg if Ur car doesn't over heat under any driving situation
any over heating with a properly bleed system is the Hg

[slow92]

my dipstick kept popping out under boost and it is because you are getting too much pressure in the crankcase and I ignored it. A few days later my piston rings went out in the #3 cylinder. Do a search on here about crank case pressure and blow by.

[Quicksilver_s13]

may your wildest dreams come true...

http://zilvia.net/f/tech-talk/235851-sr-owners-more-hp-easy-mod-catch-can-setup.html

[fliprayzin240sx]

If your dipstick is blowing out, try swapping dipsticks. The rubber grommet/seal might just be completely fucked. After that, time to do a compression check.

My blow by is so bad that my crank case vent is puffing smoke. #2 cylinder compression = 110 psi. Dropped a capful of oil and shit went up to 160.

[Quicksilver_s13]

If your dipstick is blowing out, try swapping dipsticks. The rubber grommet/seal might just be completely fucked. After that, time to do a compression check.

My blow by is so bad that my crank case vent is puffing smoke. #2 cylinder compression = 110 psi. Dropped a capful of oil and shit went up to 160.
:trogdor:good call, my dipstick was doing the same thing and i just put a new one in becasuse i had it laying around...problem solved. just find a new rubber o ring to replace the one that's on the dipstick and it should seal like a champ!

[seeks14]

Check your turbo man..take ur ic pipeng off and loook for oil in them...if u need any help come through my house and i will take a look at it..

[FabulousS13_Breh]

okay how is a catch can going to "stop" blow by?

[hulkster_s13]

I did that mod with the catch can and valve cover

[240sxrb25]

if this motor is at all similar to my rb, such as having pistons and rings lol, then your ringlasnd could be crumbling. i had the SAME EXACT symptoms as you and turned outmy motor was totally worn out plus one cylinder that had 60psi wet lol. part way throuhg a hard run it would start smoking..then after i stopped a couple good revs the smoke would quit at idle

compression test that badboy soon.


and what was that guy thinking.....oil burns black. come on

[240sxrb25]

okay how is a catch can going to "stop" blow by?
it doesnt it just keeps the oil from actually going back through the intake resultingin smoking....your still losing oil, your just moving ot from the engineto a can haha. its not a fix really

[Itzgunzduh]

Oil shoots out my dipstick too ; the o ring on my dipstick is shot i feel it lol ; but how im gnna be sure that the problem ?

[rcdad123]

high rpm smoke can be caused by worn or weak oil control piston rings. an oil dipstick that pops out can be caused by a weak or missing dip stick o ring like what a few people already said, or a bad case of combustion pressure leak(blow by). if its blow by, the piston rings are worn. if you dont want to rebuild the engine yet and dip stick still popping out after replacing the o ring, try holding it in by using a return spring. a good clue that the piston rings are worn out is a catch can that gets filled with oil right away after it gets drained. you can also try a restrictor on your turbo oil inlet. too much oil going to the turbo will cause the oil to leak out of the compressor or turbine and will cause smoke also.

[di-devol]

This thread is from 2010.

Oil shoots out my dipstick too ; the o ring on my dipstick is shot i feel it lol ; but how im gnna be sure that the problem ?

And oil shooting out of your dipstick tube is different than your dipstick popping out.