Jump to content
The mkiv Supra Owners Club

Blue smoke - confirmation?!


suprattgaz

Recommended Posts

Just to confirm, been doing lots of research but it all seems to point towards the following short statements:-

 

1.blue smoke on start-up and after a blip following tickover for several minutes is worn valve stem seals.

 

2.Blue smoke whilst driving, decelerarting etc is turbo seals.

 

3.Both are more apparent after a full de-cat.

 

4. Oil in the FMIC and BOV is pretty normal.

 

????????????????????????????????:search:

Link to comment
Share on other sites

a full decat will certainly bring any problems straight to your attention...a small bit of oil in fmic and bov is pretty normal i would say, certainly if your blatting it...1 and 2 im not to sure, you'l have to wait for the technical wizards to arrive!! :)

just used that wonderfull "search button" and yeah it seems all your theories are correct my friend

Link to comment
Share on other sites

#1 is not 100% correct I think

 

When you blip after the car is already running and you get blue smoke, it's most likely the turbos on the way out. Stem valve seals only show up when you start the engine.

 

I remember Clarkey having this blue smoke at a local meet, and it was indeed turbo seals gone.

Link to comment
Share on other sites

Well I have recently had both cats off (within the last 3000 miles), and it has started to blow out a puff of blue smoke on start-up, only for a second or two. The only other time I have seen it is when it has sat ticking over for ages, and then you blip the throttle. Peope following say nothing comes out at all, even giving it beans through gear change etc.

 

Don't know if it would make any difference but I have recently been running 0W40 mobile 1 as it only comes out for short blasts.

 

Does that help?

Link to comment
Share on other sites

It'll be fine, just stick some 5W40 in the next time you change the oil. You'll probably find it will clear up the smoke. On a new car it probably wouldn't be an issue but I reckon it's valve stem oil seals starting to wear that's showing up because of the thinner oil. Nothing to worry about really.

Link to comment
Share on other sites

I remember Clarkey having this blue smoke at a local meet, and it was indeed turbo seals gone.

 

Indeedy. My stock tubbies - were on they're way out. Hence went single - 2 months or so after. My SMIC had almost a 1/2 a litre of oil in it.

 

I've no idea how much life the stockers had left in them .. :shrug:

Link to comment
Share on other sites

Indeedy. My stock tubbies - were on they're way out. Hence went single - 2 months or so after. My SMIC had almost a 1/2 a litre of oil in it.

 

I've no idea how much life the stockers had left in them .. :shrug:

 

was this when you were accelarating or on start up?

Link to comment
Share on other sites

Check the interior of the IC piping and the intake pipe - for excessive oil. Compressed air should be the only thing flowing into the intake - if there is oil seeping out of the turbo seals - through the IC - into the intake .. then that could explain your smoke.

 

I'm not suggesting you do this - because I'm smart. But only passing on the advice that the tech-heads gave me. ;)

Link to comment
Share on other sites

Check the interior of the IC piping and the intake pipe - for excessive oil. Compressed air should be the only thing flowing into the intake - if there is oil seeping out of the turbo seals - through the IC - into the intake .. then that could explain your smoke.

 

I'm not suggesting you do this - because I'm smart. But only passing on the advice that the tech-heads gave me. ;)

there is a small amount in the intake piping, but not an excessive amount

Link to comment
Share on other sites

What about the pipework into your IC ? You might not be able to diagnose this .. until someone looks at it for you.

 

Uncle Mark & Paul - of Phoenix, Watford are the chaps to speak to.

im gonna take it off tomorrow and have a butchers....its going up to whiffbitz soon so i'l see if paul can have a look for me.

cheers for ya help dude

Link to comment
Share on other sites

  • 1 month later...

Hmm before i had a little white smoke when i was idle for 2-3 minutes.

I have full decat and 3" downpipe and 4" exhaust all the way,....HKS 4" Ti..

 

But now i only get a little "puff" of blue smoke sometimes when i drive of...

Is this something to worrie about ?

Link to comment
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
×
×
  • 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.