4agte Oil pooling on top of pistons

[oldcorollas]

there was 2 different valve stem seals in the genuine kit, black and a really dark brown. apparently the black is intake and brown exhaust.

black is plain old nitrile rubber

brown is viton, and better for higher temps...

thats why they are different colours. they should both still seal the same, but the brown ones last longer

[Grega]

is this a FWD or RWD setup?
where do you have the breather from the rocker cover plumbed? have u a cut and shut manifold?
theres a common issue when people do a cut and shut manifold they plumb the breather from the rocker into the inlet manifold port (i did this years ago) - the problem is this pressurizes the rocker and may be pushing oil past the seals down into the cylinders (especially as you motor is turbocharged)

another thought is when you re-did your bottom end, was the ring end gap within the correct spec as termed by toyota?

here : http://www.toymods.net/forums/showthread.php?t=88
read the section on NOTE : RE PCV HOSE (thanks karl/jason purcell for this article)

hope this helps mate

[GT1978]

Check the oil drain for the turbo also. Turbos generally like free flowing oil drains.
Any news on what the inside of the intake piping looks like? Any indication it is coming from a point along the intake system?

Glen

[fandio]

Its in a fwd set up ae92, and the crank breather goes into the catch can then plumbed into before the turbo, that was the first thing i disconnected to trouble shoot it. also there isnt any oil in the intake piping. oil drain for the turbo is all sweet, had problems with my old setup, so ive changed it all.

just took the car to the place that did the head, they were completely shocked at the amount of oil sitting on the pistons. so they want the car early next week to check it all out

[Cuzzo]

What turbo are you running and do you have an appropriatly sized feed? Maybe its being feed too much pressure/oil flow?

[Grega]

cuzzo.....nah if the wrong restrictor was in the oil supply line, he'd have oil in the intake piping ect which he said he doesn't have.

if you don't have the right ring tension perhaps the rings are not scraping the oil off the bores like they should be and the oil is collecting on top of the pistons for some reason?

if its that much oil you want to be careful you don't hydraulic the thing matey too...

another thing what weight oil are you running?

[fandio]

yeah its not coming through the turbo, that is restricted down to 1mm.
was thinking it could be oil rings, though you would think the compression rings would stop that much oil

[Grega]

when u did your comp test did you do it wet or dry?

[GT1978]

when u did your comp test did you do it wet or dry?

By the sounds of things it would have been wet if he wanted it or not.

[fandio]

By the sounds of things it would have been wet if he wanted it or not.

pretty much

[fandio]

pulled the bottom end apart today, looks as though the rings that id installed were chrome (had no idea at the time just wacked in what the machinist gave me) so i guess they didnt take to the bore like they shoud have. though while ive had it apart found number 1 bigend bearing looking on the average side so looks as though it will all be a bigger exersize then first though
so will either go for acl black rings or genuine this time, unsure atm (need to do a bit more reseach this time, not pulling it apart again)

[30psi 4agte]

my vote is for acl.

Are you sure the rings are the prob though?

[Grega]

fandio what rings did you use (brand) out of interest?

[fandio]

well at first i thought they were chrome by the sealing surface being shinny, but now i have them off they dont look that much different to the standard 100kw ones i just pulled apart.
when i was taking number 4 piston rings off (the cylinder with the most oil) a large chunk of the ring land came off too so i guess that doesnt help the situation

they were acl rings in there

my latest thinking is when my turbo started blowing a bit of oil past the seals it didnt help the new rings too much

[allencr]

a large chunk of the ring land came off too

Which ring land, what position?