Thread: Blue smoke from a Diesel, only under certain conditions

Update.....
Update.......

I spoke to the Guru of Landys (Fred Smith) who has informed me it is most likely Pump Timing.

He has explained that if they are out only a whisker they will blow blue/white smoke.
I explained the conditions its doing it and when it does it and the start problem and he is thinking it is Pump timing.

So this weekend i have to clean the Turbo pipes and also check the Pump timing.

Lets hope it is..... other wise i'll be really scratching my head

A quick question here...what is the mileage on this donk and how has it been treated?


My gut feeling is the the oil ring; while the rest has merit, there's a basic rule of physics to apply. Blue smoke is oil and somehow it's being burnt, which means it's getting into the firing chamber; so how is it getting in there in enough volume to do so? By your description of oil consumption via the sump......

As was said before and above....

If it is the oil ring this can be ameliorated for a while, but the piston rings, time for a rebuild.

Compression check would also be advisable.

Exhaust valves are not ultimately an excuse for oil (blue smoke) burning, in my experience. ie if they're sus you would have already noticed other dramas,

Back to Q#1 mr clarke I'm curious. Pump timing? I thought the idea was that the oil was a continuous (and therefore irrespective) flow and as the pistons moved up and down, oil drew to lube the pot, but the oil didn't get past the last of the three rings or you'd be drawing oil and burning it, inturn compression would be lower than spec.

Cheers, GQ

<div class='quotetop'>QUOTE</div><div class='quotemain'>Ohh question.. as this has Air con. How in hell do you get the intercooler out as the top radiator plate is bolted to the condensor and it is not encaged nuts... Grrr.... cause i would have cleaned it last time if i could get it out easy. [/b][/quote]

Hmm, this one is a pain. I recently took the radiator & intercooler out to get the rad tanks sweated off for a thorough clean, and at the same time flushed the intercooler. Unfortunately, even with the top plate off, you don't seem to be able to get either unit out because the end plates are folded over and there isn't enough room to get them out with the A/C condensor in place. :roll:

The only way I could get either rad or ic out was to remove the front slam panel, unbolt the A/C condensor from the front of the rad, and gently swing it forward so I could then lift the entire rad/ic assembly complete with it's surround up out of the vehicle. Note that the A/C condensor must be moved forward first, because it sits on the bottom of the rad surround and wont allow that to be lifted as is. The slam panel had to be dissassembled on mine because the stays were in the way of the bolts holding the A/C condensor to the rad and prevented me being able to swing the condensor forward.

An obvious word of warning here, the lines to the A/C condensor are alloy, 12 years old and wont appreciated being pushed and pulled around. Move things as little as you can possibly get away with to get the rad out. You don't want to over stress the pipes and be rewarded with a pssssst from a cracked line, especially with an old R12 system.



Paul [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]

Originally posted by Quiggers



,

Back to Q#1 mr clarke I'm curious. Pump timing? I thought the idea was that the oil was a continuous (and therefore irrespective) flow and as the pistons moved up and down, oil drew to lube the pot, but the oil didn't get past the last of the three rings or you'd be drawing oil and burning it, inturn compression would be lower than spec.

Cheers, GQ

Injection pump timing not oil pump. THe belt has been changed just before the problem was noticed, it's easy to get the pump timing wrong if you don't do the belt job correct. Poor pump timing will make them smoke just like this.

Yep Shaunp, thats what i have been told.
Blueish smoke, rough start could be pump timing.

1 way to find out, Pull it down and look.

i'll clean the Turbo hosed/intercooler while i'm there.

and unpack it....lol.. still full of camping gear and Fridge...

You can check the timing via the window on the cover I think.

Thats what i'm hoping......

if not Grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrr

Got it, shaunp, thanks, this might explain one of my issues. really must get it tuned!

GQ