Smokey exhaust from a 2H diesel

Submitted: Friday, Mar 25, 2005 at 21:44
ThreadID: 21519 Views:4336 Replies:5 FollowUps:6
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Hallo all,

I'm feeling bad about our old troopie: The old 2H diesel is up to 200000 km (which I gather isn't all that far for one of these things) and it blows a little bit of black smoke on startup (rich mixture?) but the worst dose of pollution comes when you take your foot off the accelerator to change gears or slow down; there are clouds of blue smoke (= oil burning right?). I've driven along behind it, and it seems this only happens when the accelerator is released. Another thing: when the accelerator is released and the clutch depressed, the engine seems to keep revving for a second or so rather than slowing immediately - as if there's a return spring missing somewhere on the accelerator.

Any clues? Any suggestions for a good service centre in Perth

Cheers,

Dave.
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Reply By: Bros - Friday, Mar 25, 2005 at 22:10

Friday, Mar 25, 2005 at 22:10
David W,
I don't profess to know a lot about diesels, just things my diesel fitter mate has said. (When you gotta diesel you gotta have a diesel fitter mate).
I have a 11/85 HJ 75 that has done 339,394 and still going strong. The only thing i could suggest is that you get the injectors done (black smoke). Had mine done late last year and picked up 80/100 K's per tank. As for the blue smoke i hope it's not rings. When you shut the motor down it is supposed to stop immediately (and i mean immediately). If yours keeps running for the second or so then it could be compression. Not much help i suppose but someone on here will know for sure.
Cheers,
Bros.
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AnswerID: 103848

Follow Up By: David W - Saturday, Mar 26, 2005 at 02:28

Saturday, Mar 26, 2005 at 02:28
Thanks Bros - I figured I was in trouble when I realised none of my mates are diesel fitters, hence the note to the forum :)

The running-on seems to have got worse at the same time the smoke's got worse. The engine stops dead as soon as you switch off the ignition though.

Cheers,
Dave

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Reply By: muzzgit (WA) - Friday, Mar 25, 2005 at 23:04

Friday, Mar 25, 2005 at 23:04
David. What area you in ?
AnswerID: 103854

Follow Up By: David W - Saturday, Mar 26, 2005 at 02:16

Saturday, Mar 26, 2005 at 02:16
We're right in town, so Osborne Park/Myaree/Cannington would be fine if you're thinking of a service place. If you know someone good a bit further out then we can figure out a way to get there.

I like your note about experience!

David.
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FollowupID: 361366

Reply By: Member - Royce- Saturday, Mar 26, 2005 at 00:10

Saturday, Mar 26, 2005 at 00:10
Cleaned the air filter lately?
AnswerID: 103858

Reply By: muzzgit (WA) - Saturday, Mar 26, 2005 at 02:50

Saturday, Mar 26, 2005 at 02:50
Robson Brothers have a good reputation, so do TLC in O'connor. Both may be a little expensive.

Mike Young of Mikes Auto's in Myaree is pretty good with diesels. A Good honest bloke.

It would also pay to ring a Toyota dealer and have a chat with the service manager.
AnswerID: 103866

Follow Up By: Davoe - Sunday, Mar 27, 2005 at 08:17

Sunday, Mar 27, 2005 at 08:17
you are kidding right? unless there are different Toyota dealers in your part of the world coz i n kalgoorlie they are legendary for being incapable of doing anything other than oil changes - wouldnt even take my pushbike there to get the tyres pumped up!
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FollowupID: 361431

Reply By: kesh - Saturday, Mar 26, 2005 at 08:09

Saturday, Mar 26, 2005 at 08:09
Dave The injection pump govenor on the 2h is in part controlled by a diaphragm in the end of the injector pump housing. The 2 hoses above and below the throttle valve connect to the diaphragm chamber.
A small split in the diaphragm may not alter the operation of the motor, but it would allow oil to be sucked into the inlet manifold with resulting blue smoke.
The fact that the motor does not immediately idle down after lifting your foot also helps confirm this.
Apart from wear on the valve rocker arm tips, those 2h motors are just about indestuctible!
the kesh
AnswerID: 103871

Follow Up By: V8Diesel - Saturday, Mar 26, 2005 at 09:50

Saturday, Mar 26, 2005 at 09:50
I was going to suggest valve stem seals gone hard, but kesh's answer makes much more sense with the idle down issue.
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FollowupID: 361373

Follow Up By: David W - Saturday, Mar 26, 2005 at 13:42

Saturday, Mar 26, 2005 at 13:42
Thanks kesh that sounds like a good tip - I'll fish out the service book and start looking, then I'll take it to one of the places suggested by the others: petrol engines I know a bit about, but I'm new to diesel

Thanks,
Dave
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FollowupID: 361380

Follow Up By: ross - Saturday, Mar 26, 2005 at 15:02

Saturday, Mar 26, 2005 at 15:02
I agree with Kesh on this one.Also as the diaphagm gets worse so will the revving.
Its not uncommon on the H and B diesels
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FollowupID: 361385

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