Jump to content
The mkiv Supra Owners Club

Smoke on start but not under acceleration


suprattgaz

Recommended Posts

I have had a blue puff of smoke, (not every time, only 50% of the time), when I started the car of recent (well actually over a year now!). I don't get any under boost, but if it idles for a long time and i then parp it it puffs again.

 

It sits around for 2-3 weeks at a time between runs, but this shouldn't happen. Searching this site it could be valve stems or turbo seal. Which is it? And am I doing any harm running it like this?:search: :(

 

Chrz,

 

Gary

Link to comment
Share on other sites

Normally I am very pedantic over this sort of thing and would get it fixed instantly - but with buying my first house, and throwing a lot of money at these headlight conversions I can't really afford to get it fixed (~£1K ish).

 

I am not confident enough to change them myself, although I should be able to really. Have the luxury of a garage all to myself now :cool: (oh, and a tumble dryer for the missus!:tongue: )

Link to comment
Share on other sites

I think thats VSOS's as well. A couple of people i know had this problem. Cold start up (usually when left over night) would puff for about 2 seconds. I think all you have to do is check your oil level regularly because obviously you are using a little bit up each time, but then if its only a small puff then the amount will be tiny. Incidently both the people who had them changed reported that the smoke disappeared on startup. I think if it was turbo seals then it puffs under boost.

Link to comment
Share on other sites

i got all the parts for around 120

 

you need:

 

12x inlet stem seals

12x exhaust stem seals

2x cam cover gasket

2x camshaft oil seals

the 2 breather hoses in the middle of the covers is usually a good buy

 

U need a decent valve stem removal tool and a special tool to knock out the retainers and collets, if you're careful you can do it with a socket

Link to comment
Share on other sites

Smoke is a bloody hard problem to pin down isn't it. Did you get this sorted?

 

I had my turbos removed and replaced by Turbofit as I thought they had blown (massives of cloudy white/blue smoke on startup and on throttle), but it turned out this was not the cause of the entire problem - possibly part of it though.

 

Now it looks like the VSOS. BUT, I don't get a puff of blue on startup and it only seems to appear after driving about 15 minutes in, and not all the time either. Just puffs of blue smoke.

The Turbo oil seals have been checked and are OK.

 

Most people speculate that corroded VSOS are visible on startup through initial smoke and clear after running the car - mine is the opposite of this.

 

No idea!

Link to comment
Share on other sites

Just to point out that, iirc, smoke on startup with the VSOS will depend on exactly which ones have gone - where the valves stop when you turn the engine off will dictate which ones can leak more. Hence why some people only get it some of the time - it may only be one or two oil seals that have gone.

Link to comment
Share on other sites

Ah really Bob - thanks. So, just because it's sat overnight and 'some' of the oil seals may be weeping, it doesn't necessary mean it'll smoke on startup if the poor seals are the ones that open when you turn off the engine?

 

Greg mentioned something like this yesterday. i.e/ it can happen, and does so as he's seen previously before, only when driving the car after a period of time. Mine is most like this and seems to be VERY intermittant though. Smoke one minute and then the next, completely clear without any change in throttle/idle.

 

As I said before, I knew I should of bought a bloody Skoda!

Link to comment
Share on other sites

Even so Greg, to cause the amount of smoke that was coming out of your car when revving to 2.5k revs you'd have to have something a lot worse than vsos going wrong, hence my thinking it was the turbos. The fact that I could still see the sky when your engine was running at TF ( :p ) points to them definitely being the major cause. But I agree with TF in that you'd be better off taking the head off completely to give it a full check over; just a shame they didn't decide to do it earlier, as it may have saved you a few quid :(

Link to comment
Share on other sites

Yep, I'm sure the turbos were dead too - number 1 anyway mate with the amount of white smoke bellowing out! At least it's not 'that' bad now hey! :)

 

Greg said yesterday he should of just done the VSOS as he knew they were a problem. But like I said, it was also the turbos (I'm sure anyway) and so a combination of the two and sadly, not just one solution! Oh well mate.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.