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Smokey Start up 156 JTD 2.4

Hi All

My 2002 156 JTD 2.4 is messing around on start up.

It starts perfect but as soon as I rev it up to 2000 rpm I get blue smoke mixed with white smoke and it feels rough like its slightly missing.

This will eventually clear and if I drive it there's no smoke at all when warmed up !!!!

Has anyone got a guide somewhere how to clean the EGR and are there any other parts that can be serviced rather than replaced on this diesel engine.

Just some history on the car, it sat in Spain for over 8 months not started and I had it transported back to the UK and now I'm getting it back up n running.

Cheers all

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Has it had an oil change recently?
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That's first thing to be done tomorrow as Its rained all day here.

I have a full service kit at the ready

I found this PDF on here is it the same as the Alfa JTD ?

http://www.fiatboo.co.uk/photogal/gu...lve-output.pdf
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Not on your 2002 model, they are totally different, that is from an earlier incarnation of the 2.4. On your car its the unit mounted to the back of the inlet manifold towards the gearbox end.
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Last edited by Alfa 156 JTD; 11-12-10 at 21:39.
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Ok

Are there any other parts that can be cleaned up to stop the smoking ?
Cleaning the EGR valve will help, also there will probably be a build up of a sticky tar-like substance inside your inlet manifold, I used Ecotek Powerboost to clear it out of my old JTD:

Ecotek PowerBoost

It did work but it helped that I'd cleaned loads out of the inlet manifold first with a rag on a long screwdriver. Mine was the early type so I had no throttle flap to get in the way, you would have to take yours off if you wanted to get a screwdriver & a rag inside. I suppose you could totally remove the inlet manifold and put it in a hot-wash but thats a fair bit of work.

Another thing that may be causing smoking is a build up of oil inside the intercooler. The turbos do tend to weep a bit and it ends up collecting in there.

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Quote:
Originally Posted by Pud237 View Post
Cleaning the EGR valve will help, also there will probably be a build up of a sticky tar-like substance inside your inlet manifold, I used Ecotek Powerboost to clear it out of my old JTD:

Ecotek PowerBoost

It did work but it helped that I'd cleaned loads out of the inlet manifold first with a rag on a long screwdriver. Mine was the early type so I had no throttle flap to get in the way, you would have to take yours off if you wanted to get a screwdriver & a rag inside. I suppose you could totally remove the inlet manifold and put it in a hot-wash but thats a fair bit of work.

Another thing that may be causing smoking is a build up of oil inside the intercooler. The turbos do tend to weep a bit and it ends up collecting in there.
+1 for the Ecotek power boost, did the same on mine as Pud has just described. The cleanup with the Throttle body off a few weeks ago this stopped the smoking but I wasn't happy that I had cleaned enough out as I was a bit concerned that some crud would get in somewhere it shouldn't.

Did the Ecotek bit at the weekend and the car starts quieter, idles smoother, accelerates cleaner and isn't lumpy when the engine is turned off any more.
Great stuff.......
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Quote:
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Ok thxz

Are there any other parts that can be cleaned up to stop the smoking ?
Hi Check all your hoses in and around the intercooler , holes or tears in the hoses cause smokage under acceleration too
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Found the problem

Head gaskets gone, it was obvious when I dropped the oil, not so obvious before though.

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Bad luck fella , hope you get it fixed asap
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I probably wont bother getting it repaired.

Will sell it as it is.
Saloon or Sportwagon, I might be interested
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Hi all

Ok I have in my spare time ( 1 hour an evening ) pulled the head from the car.

Anyway the heads nice and straight, replaced the stem seals and decoked the valve train.

There was no heavy build up on the valves or pistons quite light residue.
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I've cleaned up the thread and will post info pertaining to head gasket replacement

If you get lost with putting the pipe work back this might help you.

My 2002 2.4 JTD had slightly different coolant pipe work but the differences are small.
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After what seems an eternity .................

Its alive again

Cranked over to get oil pressure up.

Connected the injector plug leads and it fired first time in this really cold weather (impressed).

Will do the run in procedure tomorrow make sure all is ok once up to temp etc.

Then to tackle the inner CV boots
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Ok

One problem solved (water in the oil) but I still have the smoke.

I have the white/blue smoke from start up and the engines running rough until it warms up after approx 15 mins.

There's a slight misfire that can be felt as a pulsing at 2000-3000 rpm

Could this be an injector fault as I'm thinking a leaking/dripping injector overnight ?

Cheers

Updated Now Resolved

https://www.alfaowner.com/Forum/engin...nspection.html

Last edited by Alfa 156 JTD; 24-01-11 at 18:51. Reason: Problem resolved
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