JTD black mess - Alfa Romeo Forum
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(Post Link) post #1 of 14 Old 20-09-11 Thread Starter
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JTD black mess

I took the plastic engine cover off my 1.9 GT for the first time last weekend and wished I hadn't. Something's obviously been leaking but I've no idea what. The black stuff in the photos is hard and brittle. Any ideas what's going on? Everything works fine although I do have a Glow plug error showing up on the dash.
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Baked on carbonized oil residues?
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(Post Link) post #3 of 14 Old 20-09-11 Thread Starter
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It's certainly baked on something. The leak to the left seems to be slightly oily but I couldn't tell if it was engine oil or Diesel that had caused it. The right hand one is more like charcoal!
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I've seen this before.

It's nightmare to clean up.

Your injector seals may need replacing.

Alfa Romeo GT Injector Seals

HTH
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Leave the cover off for a while, and then with the engine running with some revs and you may see some sort of emission forthcoming from wherever?
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What Padders says seems a sensible consideration?
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(Post Link) post #7 of 14 Old 21-09-11 Thread Starter
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Quote:
Originally Posted by Padders View Post
I've seen this before.

It's nightmare to clean up.

Your injector seals may need replacing.

Alfa Romeo GT Injector Seals

HTH
Thanks, I guess that's not a big job?
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Try chiselling away some of that carbon deposit ...it's hard!

Anyway, I left it to my local specialist as like you, I didn't know it was the seals until afterwards.
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most definitely the seals (copper washer) of the injectors. probably the injectors worked themselves loose a bit, seen it hundreds of times on PSA HDi engines, less common on JTD's
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Thanks guys, I'm a lot less worried now. If I can get the parts in time I'll have a go this weekend.
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(Post Link) post #11 of 14 Old 25-09-11 Thread Starter
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Well a friend and I had a go today, it took ages freeing the injectors from the goo, not a fun job. I strongly suggest having an old Hoover handy to suck up the bits and stop them falling in the engine! 1 and 3 (left to right when viewed from the front) were the 2 that looked like thay had leaks but 4 didn't have a copper injector seal at all but appeared to be fine! Getting the seals out is a pig of a job, took us ages. Just need to wait a few weeks now to see if it has worked. Fingers crossed.

Last edited by JetSetJim; 26-09-11 at 06:11.
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Brera 2.4SV

Ive got an injector that looks like this. Ive notice that when the engine is hot, the black goo is quite soft.

this is my first diesel (1.9 16v) and i was told that if any of the carbon drops inside the engine it could shatter the turbo

you would have thought they could come up with a better method of sealing injectors operating at such high pressure than a copper washer and a bolt holding a fork down

maybe i can have a go at sorting mine out if it really is a DIY job

keep us updated
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if they torqued the bolt up properly, it wouldn't work loose and everything would stay sealed...
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(Post Link) post #14 of 14 Old 27-11-11 Thread Starter
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2 months and a couple of thousand miles later and all seems well. No obvious new leaking and the smell of fumes has disapeared! It may be safe to put the engine cover back on at last. A guy at the place I had my tracking done the other day suggested pouring coke on the black stuff to disolve it. Not tried it but for the sake of 60p I may give it a try!
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