I need help please, TD42 blowing white smoke

Submitted: Wednesday, Mar 04, 2009 at 23:05
ThreadID: 66514 Views:8236 Replies:13 FollowUps:3
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My 89 GQ 4.2 diesel, aftermarket turbo blew a fuel cut solenoid, so I had one trucked out (my wagon is out west) and a mate fitted it, but had to partially dismantle the injector pump. He thinks he has put it back together property, but the thing blows a bit of white smoke at idle, and runs rough and blows a lot of white smoke if revs are increased, enough to burn your eyes.

Given he has no real tech tools or test bench, what should he be looking at to correct it?. We have changed fuel filter, checked banjo bolt filter, changed engine oil, filters etc. He thinks it is running way too much fuel.

Is it more likely to be timing? Mixture?Spill timing?

I would really appreciate any advice, thanks.
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Reply By: kev.h - Wednesday, Mar 04, 2009 at 23:18

Wednesday, Mar 04, 2009 at 23:18
Hi my guess is timing i had the crank pully nut come loose and allowed the key driving the timing etc to wear enough to allow about 1mm slop in the key and you coulden't see the can for smoke( all white) mechanic said it was injecting too late to get a good burn
Cheers Kev
AnswerID: 352238

Follow Up By: the.brigand - Thursday, Mar 05, 2009 at 07:49

Thursday, Mar 05, 2009 at 07:49
thanks
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FollowupID: 620477

Reply By: Rolly - Wednesday, Mar 04, 2009 at 23:47

Wednesday, Mar 04, 2009 at 23:47
Check the fuel lift and pressure systems for the entry of air and bleed it carefully to eliminate any bubbles or pockets of air.
White smoke is often indicative of low temperature fuel burn as a consequence of air entering the combustion chamber with the fuel or as a result of the HP pump not fully pressurising the fuel due to an air pocket in the pump.
AnswerID: 352245

Follow Up By: the.brigand - Thursday, Mar 05, 2009 at 07:49

Thursday, Mar 05, 2009 at 07:49
thanks
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FollowupID: 620478

Reply By: qdisparky - Thursday, Mar 05, 2009 at 07:24

Thursday, Mar 05, 2009 at 07:24
Take your wagon to a mechanic.
All the best.
AnswerID: 352257

Reply By: the.brigand - Thursday, Mar 05, 2009 at 07:52

Thursday, Mar 05, 2009 at 07:52
Wagon probably won't make the 650 klm trip as it is, would probably do more damage. I suspect it is a minor thing causing this problem, just not sure what it is, any suggestions appreciated, thanks guys,
AnswerID: 352259

Reply By: GoneTroppo Member (FNQ) - Thursday, Mar 05, 2009 at 08:18

Thursday, Mar 05, 2009 at 08:18
Maybe it's like a white flag.
It's trying to tell you it's surrendering.
AnswerID: 352260

Reply By: Member - Tour Boy ( Bundy QLD) - Thursday, Mar 05, 2009 at 09:03

Thursday, Mar 05, 2009 at 09:03
Pump timing is 180º out
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AnswerID: 352270

Reply By: Geoff (Newcastle, NSW) - Thursday, Mar 05, 2009 at 11:28

Thursday, Mar 05, 2009 at 11:28
Did your mate fix the pump in the vehicle or on the bench?

If he did it in the vehicle the problem is unlikely to be pump timing and more likely to be air in the fuel.

If he pulled the pump off the vehicle to fix it then the problem is most likely to be timing and to a lesser extent air.

Geoff

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AnswerID: 352303

Reply By: Member - Duncs - Thursday, Mar 05, 2009 at 11:34

Thursday, Mar 05, 2009 at 11:34
I am guessing that to replace the solenoid he took the top casing off the pump. He should not have had to make any adjustments to the pump for that repair.

Assuming he has not made any adjustments I would guess that he has damaged the gasket/seal between the top casing and the pump body, and that it is leaking air and or fuel. I would replace that seal. It is a really difficult area to see, a decent size mirror can help.

The other possibility is that the linkage on, the top of the pump is leaking. Again they genrally leak fuel out rather than pull air in but it could be contributing to the problem. If that is the case you need to replace the top casing of the pump.

I would also get it to a diesel fuel injection specialist ASAP.

Duncs
AnswerID: 352304

Reply By: Member - Chris & Debbie (QLD) - Thursday, Mar 05, 2009 at 11:38

Thursday, Mar 05, 2009 at 11:38
As others have said, if he did not take the pump off it is most likely air as it can take a while to bleed out of the system. Just give it a run for a while, and crack the injector lines at the injectors while running to help bleed the air out.
Chris
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AnswerID: 352306

Reply By: the.brigand - Thursday, Mar 05, 2009 at 13:26

Thursday, Mar 05, 2009 at 13:26
Thanks everyone for your input. My mate pulled the pump apart again and the round plate is 180 degrees out, making the internal pump timing 180 degrees off. He has lined up the pin on the plate with the keyway no the shaft and is putting it together, hopefully that is the end of the story and it will be all good again.
Thanks. Happy travels.
AnswerID: 352320

Reply By: Member - Matthew C - Thursday, Mar 05, 2009 at 14:25

Thursday, Mar 05, 2009 at 14:25
Im really concerned as to why the pump was removed to change the stop solenoid,it can be done without removing pump.

Hope you get it sorted!!!!!

MAtt
AnswerID: 352330

Reply By: Member - DOZER- Thursday, Mar 05, 2009 at 18:32

Thursday, Mar 05, 2009 at 18:32
I suggest he pulls the top off again and has another look at what he forgot to do....it definately has something to do with the top coming off the pump, might be spring tension or similar, best option if you cant fix it is a reco pump shipped in from cooma diesel (no affiliation, but they do do exchange units)
Andrew
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AnswerID: 352365

Follow Up By: Member - DOZER- Thursday, Mar 05, 2009 at 18:34

Thursday, Mar 05, 2009 at 18:34
White smoke is usually unburnt fuel from lack of air or compression. Did he stuff a rag in the intake tube to keep stuff out of there or something silly like that??
If not, see above :)
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Reply By: the.brigand - Monday, Mar 09, 2009 at 20:39

Monday, Mar 09, 2009 at 20:39
Thanks for the advice everyone, my mate is a mechanic with a little bit of diesel experience, but not much, asd we were in a shed at Julia Creek with basic tools.

He could not get the solenoid off without taking the back off, but perhaps there is a way he did not know about, anyway he got it sorted and we drove the wagon back to Townsville, but it is running a bit rough and I suspect the fuel filter may be blocked, or leaking, the vehicle sat for some time before we drove it so tank is probably a bit rusty and diesel a bit tainted.

We put a new filter on it before the trip, but it is playing up a bit now, but at least I am in the big city and can get the vehicle to a proper workshop.

Thanks for the advice, it might help out someone else one day as well.
AnswerID: 353148

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