Buying '94 75 series troopie. What to look out for

Submitted: Saturday, Mar 16, 2013 at 13:55
ThreadID: 101123 Views:2262 Replies:5 FollowUps:3
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As stated just want to pick the brains of anyone here that has some experience with the 75 series.

This model has been owned and maintained by an old bloke from new. He has bout 333000km on the clock but it looks meticulously maintained.

Just wondering if there is anything particular to the '94 model that I should be looking out for.

I should also mention that he's fitted the DTS aftermarket turbo kit with 3" exhaust. Done about ten years back. He's also fitted a larger alloy radiator.

Thanks in advance...
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Reply By: pop2jocem - Saturday, Mar 16, 2013 at 15:31

Saturday, Mar 16, 2013 at 15:31
Is it fitted with a turbo boost gauge and/or a pyrometer? If it has a boost gauge give it a bit of hard acceleration preferably up a hill and see what pressure it gets to, also have a look in the rear view mirror to see if it blows any smoke. If it has a pyrometer what exhaust temp does it get to under full load.
This might give you an idea if the power increase has been kept to reasonable limits.
If the fuel settings are over done these engines can have temperature damage to cylinder heads and pistons. If kept to reasonable settings they seem to handle a turbo ok.
If the servicing has been done regularly and the car has not been abused too much these old girls are pretty long lived.
330,000 ks should be about half way through it's life depending on the above criteria.

AnswerID: 506906

Follow Up By: rb30e - Sunday, Mar 17, 2013 at 14:57

Sunday, Mar 17, 2013 at 14:57
Thanks for your advice re the turbo conversion.

The car has neither the pyrometer or boost gauge. He has been running a turbo timer though to allow the turbo to call down after long trips. The owner has also opted for a 3" exhaust rather than the recommended 3.5" to help the impeller dissipate more heat. Since the mods were performed I think he has done at least 100 000km so I'd assume its all been running pretty reliably. Although according to his history he changed the radiator to an upgraded alloy unit a couple of years ago. So maybe there were some issues with temp climbing in certain situations.

I did a big rev and there was no smoke what so ever, even when on the road and under full load no smoke. Leaves me wondering maybe its running on the leaner side. After the Turbo kit is fitted is anything done to the injector pump to compensate for extra fuel?

Also I just looked at it more closely yesterday and noticed oil beginning to weep from the back of the cylinder head, just bellow the exhaust manifold. It looks as if it has been doing this for some time and has trickled down slowly around the bellhousing etc.

I made an offer considering that the head gasket may need replacing, because everything else fits the criteria. Especially because its auto, I'm paraplegic so unfortunately manual is not an option making this rig one of a kind for me.
FollowupID: 784117

Follow Up By: pop2jocem - Sunday, Mar 17, 2013 at 22:08

Sunday, Mar 17, 2013 at 22:08
You're lucky to find a Troopy of any vintage that has been fitted with an auto. Certainly a rare beast.
Not sure about the thinking behind the exhaust sizes, generally a larger diameter exhaust is to allow the turbo to ''spin up" and develop boost pressure sooner which diminishes the lag you can get between putting your foot down and the engine developing extra grunt. I can't see how the 3" or 3.5" exhaust would make much difference to the impeller dissipating heat. Having said that I would think the 3" will be fine.
I know there is a mod that can be done to the fuel pump whereby an aneroid is fitted to prevent that big cloud of smoke (unburnt fuel) coming out the tail pipe when you stick your foot into it. Usually the maximum fuel adjustment is re-set to allow more fuel to be injected so that the extra air volume generated by the turbo can be used to advantage. This is where a lot of people get into trouble by just increasing the fuel and not monitoring the exhaust temperature with the result being engine damage.
If you go ahead and buy this unit I would get that oil leak fixed and while the head is off, it, and the piston crowns can be inspected for cracks or over heating. Yeah, I know a bit late then but unless you know a good mechanic or have x ray vision there is no other way.
After that I would recommend taking it to a fuel injection shop with a dyno that knows a bit about tuning diesels and have them set the fuel pump up for you correctly. I would still fit an exhaust temp gauge and keep an eye on it.

Good luck with whatever you decide
FollowupID: 784156

Reply By: Axle - Saturday, Mar 16, 2013 at 21:07

Saturday, Mar 16, 2013 at 21:07
G/Day mate,...All that Pop said,and Gearbox and transfer case should be well checked out as there was some issues with those earlier models.

Cheers Axle.
AnswerID: 506924

Follow Up By: rb30e - Sunday, Mar 17, 2013 at 15:00

Sunday, Mar 17, 2013 at 15:00
Are you talking about the manual gearbox?

This is fitted with an 80 series GXL auto.

FollowupID: 784118

Reply By: Atta Boy Luther - Sunday, Mar 17, 2013 at 08:28

Sunday, Mar 17, 2013 at 08:28
Change all the fluids and get the radiator flushed out from a radiator specialist .
The HZJ75 is the best model i believe . They just keep going and are easy to fix .
AnswerID: 506959

Reply By: Rockape - Sunday, Mar 17, 2013 at 17:12

Sunday, Mar 17, 2013 at 17:12

I think you have enough info on the engine/drivetrain so here is a bit on the body.

Check where the roof joins the body for cracks in the paint or rust. Troopy turrets move a bit. Check the A pillars about eye height for cracks. Look under the front carpets for rust, that will tell you if the windscreen is leaking or has been leaking. If you buy it and break a windscreen ask the installer to put extra sealant in as the top moves a bit.

Great engine and a very capable workhorse.

With that engine being turboed, drop down a gear on steep hills to stop over fueling and sending the internal temps of the engine sky high. Doing this will keep the internals at a sensible temp and also keep the coolant temp down.
AnswerID: 506991

Reply By: Life Member - Doug T (NT) - Tuesday, Mar 19, 2013 at 07:43

Tuesday, Mar 19, 2013 at 07:43
My 94 Troopy now has 774,000+ on the clock, Gearbox was over hauled way back in 2005 and Transfer case in 2006.
Still runs well and can pull trees down. although I really don't think towing 84 tonne to jump start a truck was good for the gear box .

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