Replaced Valve stem oil seals but still smoke, Please help!

[paddy]

Right just spent the last week taking the head off my glanza, changed the valve stem oil seals (victor rezinz ones) cars all back together now, fresh headgasket, but its still smoking, its not as bad as it was before, as soon as u give it a little boost, then let of the throttle for a few secs then put your foot back on again u get a puff of smoke out the back. its not as bad as it was before the seals were done but its till smoking, anyone got any suggestions? could piston rings or turbo cause similar symptoms as valve stem seals? im running a gt engine with about 85k miles on it, Td04, jam ecu running .8 (rarely run over, never over 1 bar) car runs very well, but it smokes a bit. turbo core was replaced about 4000 miles ago

[richardc9052]

Sounds like turbo seals

[Ollieh17]

worn valve guides is another option

[daniel_g]

PCV valve on the rocker can cause smoke issues.

Unless youve got a race spec rocker and catch tank.

[paddy]

I fitted a Chinese turbo core, to be honest it's pretty good I don't think it's that, valve guides sound like they could be the problem, didn't think of this. Would explain having similar symptoms to stem seals. Can the guides be replaced? I have a PCV valve fitted, it's not blocked but could this still cause it to smoke with a td04?

[StuDoc 72]

Does it puff smoke when you first start it after it has been lying overnight?

[paddy]

No I'd doesn't only when the engines warm, usually after a bit of boost

[StuDoc 72]

If it doesnt puff smoke after its been lying then its not the valves.

[paddy]

I put it to the test again on my drive home from work, it's only after boosting it, drive off of boost its fine. I've just got rid of the PCV valve and replaced it with a breather but I'm thinking turbo

[gazza g]

im having this issue, its fine no smoke on startup, no smoke driving or coming on boost but if you say do 40mph in 3rd let the revs drop and then touch throttle a big cloud of greyish smoke comes from the exhaust, if i sit revving the car no smoke can be seen from the back of the car and idle shows no smoke either.

i dont think its valve seals as you said it doesnt smoke when started up, anyone else have any ideas what it could be?

[funny onion]

I've had this a few times, turned out to be turbo seals every time

[paddy]

I'm thinking more worn piston rings

[gazza g]

worn rings would give smoke pretty much all the time

[richardc9052]

Im sorry but its your turbo seals as I already stated. You are in denial as you just changed the cartridge. but come on it was a cheap chinese one. You win some, you lose some.

[paddy]

I'll get the turbo replaced and go from there. Thanks for the help

[Flynn]

Let us know how you get on mate, got 2 cars with similar issues!

[paddy]

Just replaced my turbo, fitted a melett TD04 core at a cost of £170 and still having the same problem! All this time and effort and getting no where, so far replaced PCV valve with a propper breather, new valve seals, new head gasket, new turbo core. Running out of ideas now, so frustrating!

[Ollieh17]

Left over oil from old core?sure its defo burning oil?

[paddy]

I hope so done 30 miles now and it's stil the same, you can smell the oil, the smoke is grey ish but doesn't use a drop of water

[Fozzie]

Why don't you do a comp test, that'll tell you if it's the piston rings or not?

[paddy]

I'll get a compression tester and have a go, does it matter which way round the water lines go on the turbo? Also I've read about having a restricter on the oil feed to the turbo, can anyone shead any light on this?

Edited August 22, 2016 by paddy

[5e colin]

on a ct9 there is no restrictor unless a custom inline jobby

other turbos 1.5mm for jouirnal bearing and 1mm restrictor for bal bearing

[funny onion]

Water lines don't matter either way around, personally I've never ran coolant to any of my turbos.

As above, next thing I would do is a compression test. it would be a long shot maybe but if you could get hold of a bore scope have a look down see what you can see? but compression test should tell you a bit.

I know it's frustrating but don't give up you'll find it eventually!

[Ollieh17]

Journal bearings dont really need restrictiors, escpecially on a new, journal bearing turbo.starlets dont really run high oil pressure and the oil feed i imagine is around 4an so that provides a restriction.

Have you checked your oil drain setup? Only blockages? Uphill areas? Tight bends?

[paddy]

I was digging through the forum last night, found a post with my same problem, he said it turned out to be piston rings. Shame really as the car runs very well. My oils drain set up is all fine, I'll fit some rings and replace bottom end bearings at the same side to be on the safe side, thanks for the help everyone. I'll update the post once fitted