Light Blue Smoke on start-up?

[<152587>]

Always fun to diagnose from remote.:encouragement:

How about the turbo? Could be lubricating oil finding its way past the seals on spool down and then being pushed out into the inlet manifold on subsequent start up.

Thought did cross my mind but op said it clears, not impossible, good one.

 

[Bobc]

Won't be the turbo. If oil was getting past the seal it would smoke like a destroyer under load.

The other thing it could be is a sticking piston ring which frees itself up once the engine is running, but usually once it's free it doesn't keep sticking.

If the head has been skimmed, then it won't be valve seals because they will have been replaced as part of the head rebuild.

The only other thing I can think of is that maybe it's more grey than blue, and that the injection pump timing is a bit retarded, which tends to throw smoke until the heat in the engine helps the fuel to burn better.

 

[chrishelen]

As others of this parish have quoted, it is very easy to confuse colour of smoke. I note that you do not take issue with that post. Is there an exclusive club here or can anyone provide an opinion?

Your catching on.

 

[forelle541]

Could it just be that we all look a bit closer after doing or having work done on our beloved, then you notice a change but was it really there before?

 

[RichardS]

Could it just be that we all look a bit closer after doing or having work done on our beloved, then you notice a change but was it really there before?

You may feel able to say that about your Wife ......... but I couldn't possibly comment.

Richard

 

[forelle541]

History favours the brave!

 

[Baddox]

I had a car with exactly the same symptoms that you describe, and narrowed the problem down to the turbo oil seals. Check if there is any oil in the outlet from the turbo pipe that connects to the inlet manifold.

 

[PaulRainbow]

I had a car with exactly the same symptoms that you describe, and narrowed the problem down to the turbo oil seals. Check if there is any oil in the outlet from the turbo pipe that connects to the inlet manifold.

There is always oil in turbo/intercooler pipes. If you get a split in one it will blow oil all over the engine bay. Failed turbo seals will cause smoke all the time, it won't clear after a minute.

 

[Ian_Edwards]

Thanks, for all the input, we'll take another look at the engine this weekend and see if we can eliminate some of the potential causes.

After that, it'll have to wait awhile my friend works offshore and is due to fly out Sunday or Monday and won't be back for at least 2 weeks.