R34 Gtt Oil Ontop Of Piston

[Mitch34]

Hey guys, I'm devo right now..

My 34 gtt has be running like shit the past couple of weeks, till the other morning it got worse, I was sitting at the lights then it suddenly started running worse then noticed that it was pouring white smoke out of the exhaust.. literally pouring!! I got so many stares haha

Took it to the tuner last night, they looked at it today and noticed oil ontop of cylinder 5 once spark plug was out. The bloke thinks it's valve stem seals or rings it runs fine till the engines fully warned up then it pours the smoke out! Need help guys! What's your thoughts?? Cheers

[PN-Mad]

Done a compression and leak down test?

That will probably tell you your answer. Holed piston/ oil control rings

Get another neo and slap it in.

[Mitch34]

Haven't done a leak down test but did a compression test a couple days ago 150psi across all. I would slap another neo in but that's $$

[533 RYC]

The amount of oil in the cylinder would have masked the comp test results.

If its a failed oil control ring, the extent of failure won't be known until the piston & rod are removed.

Be careful, as a worst case scenario, piston can pickup on the liner & break the piston, liner & your engine.

You could inspect & replace valve stem seals.

First step, I would be boreoscoping the cylinder with the piston at BDC to check the liner for evidence of the piston picking up.

[533 RYC]

Sorry, re-read OP. I'd bet on the valve stem seal failing from possibly a worn valve & guide, as per the symptoms of running like shit the last couple of weeks.

How many k's on the engine? Boost levels? Type of oil used?

[Mitch34]

Only been running around 10psi, 117,xxx kms on engine and I use 10w40 nulon oil. I think I might get a bore scope into it and check out the valve conditions. I really hope it's nothing to do with rings

[Mitch34]

And if it's valve stem seals shouldn't it smoke on start up? It's only starts pouring smoke once warm.

[533 RYC]

And if it's valve stem seals shouldn't it smoke on start up? It's only starts pouring smoke once warm.

Yes & no. It will be more pronunced when warm due to the increased clearance between the valve stem & guide.

When does it start running like crap? When the smoke starts?

A mate of mine had an R33 GTST. He bought it running rough. Ended up pulling the head. Found little divots/scallops in the top of the liners from valve contact as most of the valves/guides were worn. He did the head up & did an RB30/25 combo.

[PN-Mad]

Does it smoke when your giving it a boot full, or when it's coasting, say down a steep hill in a low gear?

[Mitch34]

We'll apparently my new injectors are leaking. I warmed the car up then turned it off and there was practically fresh fuel around the turbo flange. Got them all out just then. Number 5 injector was completely stuck in there! Which shouldn't make a difference lol may send them to get tested.

[533 RYC]

A stuck injector is very possible, however it won't be white smoke, as there isn't that much oil to wash off the bore. The smoke will be more black. The other side of this coin is fuel dilution in your oil. What does your dipstick say? Do an oil change BEFORE you start it again & measure the quantity that comes out.

[Mitch34]

Nah mate..I pulled out all the injectors and found that the workshop that fitted them left the seals from the old injectors in there and blocking the flow completely in 2 cylinders. Cylinder 5 & 6.. Sending the car back there and they are doing it all over for free. I'm relieved yet frustrated at the same time haha hopefully there isn't any internal damage

[Ben C34]

Nah mate..I pulled out all the injectors and found that the workshop that fitted them left the seals from the old injectors in there and blocking the flow completely in 2 cylinders. Cylinder 5 & 6.. Sending the car back there and they are doing it all over for free. I'm relieved yet frustrated at the same time haha hopefully there isn't any internal damage

Wow. That's not cool. Also, cant see how that would cause smoke, unless theres more issues. Good luck getting it sorted .

[Mitch34]

I know! They originally thought it was those yellow jacket coil packs causing the misfire etc. but I replaced them with splitfires and made no different obviously.

[B-rice]

I have same problems with mine smoke on decel, take off and gearing down, at idle it does smoke a little somtimes will probably have to pull the head off. Someone mentioned it can be done by pressurizing the cylinder your working on. And found the seals for about $50 from nissan.