There is no oil in the intake pipes.

On 11/03/2014 8:15 PM, "Hunt M" <huntatwork@gmail.com> wrote:

My crank case breather system isn't ideal. Instead of a line out of the breather box going to the intake, I have an air filter on the box.

The air filter was very dirty so I'm guessing it was blocked and caused a decent amount of positive pressure in the crankcase.

If this is the case, would this have caused oil to pass by the turbine o-ring? And if so, would this damage the o-ring permanently or once I've fixed the pcv set up, should the oil that's been forced into the downpipe eventually burn off?

On 11/03/2014 8:02 PM, "Hunt M" <huntatwork@gmail.com> wrote:

So checking the pvc when driving doesn't seem to be any smoke. There is a tiny amount but it's VERY small. Almost unnoticeable.

Also if the stem seals are leaking, that would mean oil entering the combustion chamber?
And that would be visible on the plugs?

On 10/03/2014 1:00 PM, "Hunt M" <huntatwork@gmail.com> wrote:
Hmmm - it's quite a mission to take my downpipe off, so that'll be a troubleshooting step I'll leave till later haha.

Yeah oil drain from turbo is pretty free flowing. Mostly vertical with a gradual bend as it leads into the sump. I'll take a picture tonight of it.




On 10 March 2014 12:40, Cully Paterson <Cully@supras.org.nz> wrote:

Blue smoke.

 

Judging by the amount of smoke I wouldn’t expect to see much residue in the downpipe – it’ll be burnt off before it gets a chance to pool.  You might get a bit if you start it from cold and shut it down again before the exhaust gets a chance to heat up much.

 

How’s your turbo oil drain?  Properly vertical and free flowing?

 

C

 

 

From: bounce-102386-266@list.supras.org.nz [mailto:bounce-102386-266@list.supras.org.nz] On Behalf Of Hunt M
Sent: Monday, 10 March 2014 12:34 p.m.


To: Supra Club of NZ Mailing List
Subject: Re: [sconz] Smokey at idle

 

Thanks for that.

 

What colour smoke from the PCV should be expected from a bad valve stem seal?

 

I will take the intake pipe off to check for oil residue. Should probably check the pipe between turbo and intercooler too? Although with the plugs not looking like they're burning any oil, I'm a unsure if this would be the fault....

 

If the turbine end o-ring has failed, I assume I would see a noticeable amount of oil or gunk in the downpipe?


Hunt

 

 

On 10 March 2014 12:26, Cully Paterson <Cully@supras.org.nz> wrote:

A badly broken valve stem seal will vent out of the PCV quite visibly.  I used this technique years ago on an RB25 whose owner had bought my old T04E and wasn’t convinced of where the smoke was coming from.  Yes, you’ll get some blowby gas, but unless your engine is poked a dead stem seal will be fairly obvious.

 

It also removes turbine end o-ring failure from the equation.  If it’s turbine end then it won’t vent out the PCV ;-).  If it’s compressor end you’ll see oil residue in the intake.

 

C

 

 

From: bounce-102382-266@list.supras.org.nz [mailto:bounce-102382-266@list.supras.org.nz] On Behalf Of Hunt M
Sent: Monday, 10 March 2014 12:06 p.m.


To: Supra Club of NZ Mailing List
Subject: Re: [sconz] Smokey at idle

 

That's what I would've though.

 

On 10 March 2014 11:58, blu_meanie <blu_meanie@hotmail.com> wrote:

Wouldnt smoke from the pcv just  indicate bad ring blowby?   Just mulling ideas for my own benefit also haha

 

 

From my Android phone on T-Mobile. The first nationwide 4G network.




-------- Original message --------

From: Cully Paterson <Cully@supras.org.nz>
Date:
To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>

Subject: RE: [sconz] Smokey at idle

One way you can diagnose if it’s valve stems seals is to pipe your PCV out the side of the bonnet using a long hose and go for a drive.  You’ll get smoke coming from it if so.

 

Cully

 

 

From: bounce-102375-266@list.supras.org.nz [mailto:bounce-102375-266@list.supras.org.nz] On Behalf Of Hunt M
Sent: Monday, 10 March 2014 11:25 a.m.
To: Supra Club of NZ Mailing List
Subject: Re: [sconz] Smokey at idle

 

Well the only thing I've done is change the valve springs and put it on the dyno. Perhaps I damaged one of the valve stem seals when I was changing the springs, or perhaps the turbine seal let go on the dyno, or maybe both haha.

I thought it was rings initially - but then I thought it was odd that there was no smoke at all when it's cold....

 

 

 

On 10 March 2014 11:22, blu_meanie <blu_meanie@hotmail.com> wrote:

 

Failing turbo seal on the hotside maybe?   I have a similar issue with my 7m, but I suspect a failing valve guide seal, as it smokes under heavy decel and initial boost, but never cold start-up

 

From my Android phone on T-Mobile. The first nationwide 4G network.




-------- Original message --------
From: Hunt M <huntatwork@gmail.com>
Date:
To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
Subject: [sconz] Smokey at idle

Hi all

 

What's a common cause of, blue smoke at idle, only when hot. Doesn't do it on initial cold start, or at all until the engine is up to temp.

 

Puff of blue smoke as I come onto full boost and then it seems to disappear, although it could still be there any i just cant see it once I'm moving at speed...

 

Spark plugs look normal and don't appear to have any oil contamination. 

 

 

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Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

 

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

 

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

 

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

 

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

 

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz
---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz
---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz