Trooper (Jackaroo) 3.0td Starting problems

Submitted: Saturday, Aug 02, 2003 at 21:10
ThreadID: 6328 Views:4131 Replies:5 FollowUps:5
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I'm on my third Trooper since 1991 here in the UK. The 2.8td was fast, tough and fun. My 3.1 was strong but dull with over-refined indirect injection. My latest Trooper (1999) is great. I have improved performance considerably with a Superchip upgrade (available in Oz I believe). 198bhp/412lb.ft now. We have the injector seal problem here as well as dealer apathy. There are also tales of engines blowing even with dealer servicing. My mate had the starting problem with his 1999 td and went for the seals. However, and to get to my point, the seals did not need replacing in his case but he had cooked his glow plugs with constant cranking. We went to a long established diesel specialist (60yrs) who knew about this problem. There is a problem with fuel seeping back into the tank, it should'nt happen but it does. Putting a one-way valve in the return line cures the problem. My Trooper started playing up recently. Instaed of panicking I put the valve in. Absolutely solved. Isuzu dealers here now perform the same trick but for lots of dosh. If anybody wants specific details on how to do it, let me know.
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Reply By: Member - Bruce and Anne - Sunday, Aug 03, 2003 at 14:12

Sunday, Aug 03, 2003 at 14:12
Hi John,
I don't own a 3.0td Jack, but am sure people will be interested in this non return valve. The reason Iam replying is that I own a Isuzu MU 3.1 turbo (grey import over here) and it has quite a bit more power thanthe 2.8 here. Did you do any modes to the engine etc? The other thing is this power chip for the 3.0 td, I just did a conversion as we use kilowats and newton meters over here and the figures I came up with 147kw and 555nm must be a powerfull rig, have not heard of anyone over here with one with that much grunt, anyway thanks for the information. Bruce
p.s. hope I did the conversion right.MU-ving on
AnswerID: 26655

Reply By: Mixo - Sunday, Aug 03, 2003 at 14:50

Sunday, Aug 03, 2003 at 14:50
G'day John. Is your vehicle the Vauxhall badged unit that I've seen on TV here (in the now silly and seemingly irrelevant "The Bill"). My 99 TD 3.0 is still doing just fine n dandy (but fingers now on the wood). The seals were done under warranty at some stage by my cagy, furtive and near on crook dealer (who now gets not a cent of my business). Re the starting, the bigger issue in Oz is the oil grade. We are told to use 10W-40 in our reasonably mild weather - down to 5w-30 for cold regions (even 0w-30 is specced by Castrol). What do you use ? In frosty conditions with a less than perfect battery I would be worried. Might have to "jump' the two batteries (aux and main). Local new Jacks now have two in line batteries !
I do the servicing myself to the best extent possible - run the oil intervals shorter than recommended. No glitches of any financial substance yet. Surprised to see yesterday that the brake pads all round seem to have hardly been worn at all ! (70k on the clock). Must be the diesel braking ! Gotta have red sand on those boots !
AnswerID: 26656

Follow Up By: Savvas - Monday, Aug 04, 2003 at 11:19

Monday, Aug 04, 2003 at 11:19
Mixo ... About your brakes, at the 60,000km service my Jack's were checked and reported as 50% worn. Which was a pleasant surprise.

Before I bought it, the service manager at the dealer (which I actually have a good relationship with) told me that I should see around 100,000km on the original brakes.
FollowupID: 18269

Follow Up By: Member - Bill- Monday, Aug 04, 2003 at 17:38

Monday, Aug 04, 2003 at 17:38
When I traded my '98 Petrol Auto last year at 120K it still had it's original pads, it was due for a 20K Service, but the previous service said 40% remaining. It did it's share of towing too, probably 30% of use. I always thought the brakes felt better with a load on.Regds

FollowupID: 18301

Reply By: Matt M - Sunday, Aug 03, 2003 at 17:59

Sunday, Aug 03, 2003 at 17:59
John, I would love to know about you power modifications and VERY interested in the 3.0 problems and solutions!!

Any information you have on my favourite trucks (Isuzu) would be appreciated!!


AnswerID: 26679

Reply By: John.N - Monday, Aug 04, 2003 at 02:48

Monday, Aug 04, 2003 at 02:48
Thanks to everyone who replied. Here are some answers: Bruce your calcs are correct, my Trooper (Jack) will do around 118 mph which scares the daylights out of the Beemers on the motorway when they see nearly 3 tonnes flashing them to move over. Here is the Superchip agent for Oz, they can do something for your 3.1 as well as the 3.0. for Matt.
Mixo, I have used Mobil1 Turbo Diesel 5w40 or 0w40 since it came on the market some years ago. It's expensive here but half price in France and better value than Beer!! In Winter £9 gets you and car there for a day through the Tunnel. I know that people say that the Trooper is fussy about oil due to it's Caterpillar starting system but in my experience dealers use mediocre stuff whatever they can buy in by bulk anyway. The 3.0 should start within 3 secs., if it starts to take longer then putting in the n/r valve should restore things. I can do a digipic of the installation if anyone cares to e-mail me. I never use cheap filters which are often Chinese pattern parts I use ADL/Blueprint which are identical to Isuzu/Holden and much cheaper. Chuck out the standard air filter which is expensive rubbish, there is a K&N and JR(French) application for all Troopers/Jacks. I have fitted billet steel spacers to increase track by 30mm each side just like your wide-track Jack., no problems at all.
By the way, I don't know if you have seen it out there but there is a 26 page catalogue of factory accessories for our cars apparently only available in Japan. The whole car can turn into a camper with beds, cooker, shower etc. The dealers here sell their own trim plates etc. which don't fit properly. I hope all this helps, let me know if I can be of any assistance. These cars are superb and do just what it says on the tin. Wish the same could be said for dealerships in general.
AnswerID: 26725

Follow Up By: John.N - Monday, Aug 04, 2003 at 03:16

Monday, Aug 04, 2003 at 03:16
I forgot to mention that as far as I am aware the injector seal problem concerned vehicles manufactured for the late '99 early '00 model year and was a faulty batch. Interestingly enough there are cars here where the replacement seals are now in need of replacement themselves. In 2001, Isuzu/Holden/Opel reduced the turbo spin speed in the 3.0 as well as the compression ratio. I wonder what they know that we don't??
FollowupID: 18261

Follow Up By: makemyday - Monday, Aug 04, 2003 at 17:14

Monday, Aug 04, 2003 at 17:14
Hi John, Very interested in your non return valve to solve starting probs. My 98 Jack has never started well on cold morns, dealers have replaced seal 3 times numerous other things and finally injectors, all under warranty. It has spent an enormous amount of time at the dealers, and with 60,000 on the clock no improvement at all. Any help you could give would be much appreciated.
FollowupID: 18295

Reply By: koppymail - Thursday, Aug 07, 2003 at 20:03

Thursday, Aug 07, 2003 at 20:03

I am interested in the one way valve that you put in your diesel fuel system to help with starting problem.
Would you please let me know the specific details for installation.
Many thanks
AnswerID: 27084

Follow Up By: John.N - Thursday, Aug 07, 2003 at 23:42

Thursday, Aug 07, 2003 at 23:42

E-mail me at and I can send pics. etc

FollowupID: 18611

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