1989 Troopy- 2H 4L Enging- Poor Fuel Economy & Lack of Power

Sorry about the spelling mistakes.

gaz,
my old 2h used to get around 14 to 14.5l loaded and about 12.l light per 100k's.

I would do 600k on the front tank before I would change it over to the back one but remember that was running empty.

That particular engine was a dog, while I have seen other 2h engines go really well.

Cause of your problem could be tappet clearance, injectors, injector pump, air filter or old age (wear). Fitting a turbo muffler helps those old girls go better. I would not go to the expense of fitting extractors or a large diameter exhaust system.

If you love the old thing installing a 12ht turbo motor will see her lift her tail. They are hard to find and it would probably cost around $6000 + just for the recon.

RA.

Hi gaz sorry about the long story but I'm sure it will help try www.costeffective.com.au I have been using their flushing oil concentrate for about 12 months and I reckon it's good my GQ had 360,000km when I tried their oil flush ,I done an oil change following the instructions they provide and got 2lts of extra sludge and crap out of the motor it runs better starts easier where before if I let the car sit for 3 or 4 days it had trouble starting like it was starving for fuel which is strange for a diesel but now it starts straight away I also use their fuel additive every 3 or so tanks of fuel. I recently put a friend onto it he has 2 troopie's the 1985 2h got 2 lts of sludge out & the 1997 1hz got just under 3lts of sludge out he said they both run better start easier and idle quieter I was sceptial at first but now think it's great and talk about fast delivery 2 days from brissy to me in mackay....Gaz just some extra info the GQ holds about 10.2lts of oil I put 9lts in to allow for the extra sludge that gets flushed out and pulled out 11lts I had my neighbour in to watch who is a fitter and he was blown away like I was give it a go gaz it's somewhere to start it saved me going to a mechanic hopefully it solves your problem if you try it.

Best to cruise at 90 to 95kph.
The roof rack makes a BIG difference. If the tent is catching air it will add significantly to the fuel [lack of] economy and the speed you can cruise at. It's a bit like having a parachute out.

It is normal and comes with the vehicle.

I had my 2H changed for a turboed, 1HZ... nice improvement and since had LPG injection added which again improved things.

More to the point though. Settle back, take a half hour longer to get places and enjoy the ride.

Is this 400klm measured by looking at the gauge or is it measured by distance and how much you have refiilled?
The gauge in these will often show empty when they have 150klm of fuel left.
Also tyre size can affect the odometer a great deal.

Ive found on the naturally aspirated diesels that wind resistance affects them far more than increasing the weight carried.
I bet that roof top tent is costing you 2-3 litres/100klms

Gaz

The 2H motor will take you far, not fast. Its got plenty of power, it just doesn't’t get it to ground quickly.

I’ve got a 1988 HJ75 with a 2H, bought it at auction ex State Govt in 1990, don’t think it had ever been offroad. As others have indicated if you treat it right (clean oil, clean coolant and right oil grade) and drive it right (2000-2200rpm) it may need to be knocked down a few cogs to get up the hill but it will get you up that hill everyday for a very, very, very long time.

I still get 11-12L/100k unloaded on bitumen or good gravel and never exceed 14L loaded no matter what the surface. I’ve certainly heard from reliable sources that a larger bore exhaust and headers will get your speed up quicker without problems but have observed those who fit aftermarket turbos to the 2H have persistent troubles. Main problem the way some people drive them is over-fuelling degrades the engine oil.

As others have said, keep the speed down, only needs to be 90 instead of 100 and expect 0-100km/h in about 2-3 mins (with a good tail wind and maybe a bit of down slope). Like the EH Holden I had when I was a kid, I’d love to get another one of these now straight off the production line, it would outlast me. Unfortunately it would also have to be at the 1988 price to keep SWMBO happy.

dermie