1992 Holden Jackaroo XS Exaust Brake (diesel)

Submitted: Tuesday, May 18, 2004 at 18:33
ThreadID: 12986 Views:3025 Replies:4 FollowUps:4
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Hey all,

I have a Holden Jackaroo and I found that it has a factory exhaust brake on it. I have noted this on one other jackaroo of this model too. I have looked around the cockpit, and engine bay but caqnnot seem to find any way of activating it yet, does anyone know how its used?

For anyone that has one, the rubber pipes in the drivers side rear corner of the engine bay is where it all leads to, I havnt traced all the pipes back yet, but i have found 1 set of wires that leads back into the fuse box.

If anyone has any ideas on how to get it to work apart from tracing back all the pipes and wires please let me know. I shall start looking at it harder over the next 2 weekends and will post my results if I get it working.

Thanks,
Gigantor
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Reply By: Truckster (Vic) - Tuesday, May 18, 2004 at 19:12

Tuesday, May 18, 2004 at 19:12
Why not just go and ask the local holden dealer?

92 model with exhaust brakes? wouldnt be factory, holden would have been bragging as would 4wd magazines when they came out.

YMMV
AnswerID: 59136

Follow Up By: Gigantor - Tuesday, May 18, 2004 at 19:40

Tuesday, May 18, 2004 at 19:40
I suppose you are right on that. It would have been something special. Its not mentioned in the manual for it either. I'll try and ask sometime during the week.

I was assuming it is a factory job since an exact same model of the car has the exact same exhaust brake in it, same pipes and colourings and such.
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Reply By: Member - Bradley- Wednesday, May 19, 2004 at 11:23

Wednesday, May 19, 2004 at 11:23
Its not an egr set up is it ????
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Follow Up By: Gigantor - Wednesday, May 19, 2004 at 13:08

Wednesday, May 19, 2004 at 13:08
Unfortunately i have no idea what and EGR setup is. My mechanic has looked at both the jackaroos and thinks it is an exhaust brake setup. I'll try and take some photos of it over the weekend and put up a post so you can look at it.

I actually had a major scare on my drive into work this morning, thought i had blown my motor or turbo. Was driving along, lost a heap of power and was blowing a lot of white smoke from the exhaust. Pulled over immediately but when i went to restart it 30 minutes later it was running fine. Yet another thing to track down on my car. Ive only had it for 6 months so im still learning about it.

Gigantor
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Follow Up By: Member - Bradley- Wednesday, May 19, 2004 at 14:51

Wednesday, May 19, 2004 at 14:51
Exhaust Gas Recurculation , used for emission control. Takes exhaust gas and re-circulates it into the inlet manifold, mixing with the fresh air. Activates on trailing throttle and depending on set-up light cruise and idle as well.

I have never seen an exhaust brake on a jack unless it is an aftermarket job.
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Follow Up By: Gigantor - Wednesday, May 19, 2004 at 16:17

Wednesday, May 19, 2004 at 16:17
Its definately not one of them then. I'll take some photos on the weekend.

Its got a vacuum valve which operates a device hooked into the exhaust line. An exhaust brake was the only thing that the mechanic and I (and the other jack driver) could figure it to be.

I'll let you know how things progress.

Gigantor
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Reply By: j j - Sunday, May 23, 2004 at 14:21

Sunday, May 23, 2004 at 14:21
May be the wastegate on the turbo. This is opened as turbo reaches its preset max boost. Just a thought. cheers JJ.
AnswerID: 59790

Reply By: Lone Wolf - Sunday, May 23, 2004 at 14:54

Sunday, May 23, 2004 at 14:54
Wouldn't it be cool if when you find it, and get it to work, it sounds like a Mack truck slowing down!! Hell, I'd buy the car just for that alone........
AnswerID: 59792

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