Overheating Troopy

If your engine is overheating it is likely the injection timing is retarded and causing more fuel to be injected to get the power you need, but the engine can't burn it effectively and an injection timing check would be a good thing to do, if not already been done.

The other thing is the engine may be overfuelled for the airflow through the engine so that will also heat up the engine and exhaust.

If you have larger diameter tyres they will cause more fuel to be used and more load on the engine, both will try and overheat the system.

The viscous fan clutch unit should be checked to a make sure it is positively driving the fan and definitely causing air displacement through the radiator. If this isn't working properly then you definitely will have trouble and into the future too.

Bull bars and driving light obstructions will also reduce essential cooling air flow.

Not only the weight of the van but it's aerodynamics may be causing more load than you realize.
You didn't say what gear you use, if an auto the load may be heating the trans oil and it has to be cooled too, usually by the engine system which is already running at a max.

All this needs to be addressed before considering any intercooler.

The turbo has the ability to cause more heating than normal if everything isn't in balance with the cooling ability of the radiator, the exhaust free flowing.

Think turbo, think more heat stress on everything, ok when all is working correctly, at the moment it may not be.

Ross M

Hey Coogs, I have the identical set up as yours including the 2.5 ton van and I have a safari turbo fitted and NO intercooler, and it will still over heat when towing IF you keep your foot on the pedal, over fueling is the problem.
I am assuming yours is mechanical injection like mine and so you control the fuel going in with your foot position like me.
I only tow in 4th gear and use the gears a lot and have a EGT gauge to watch my post turbo temperature which I keep to a max of 615 degrees C no more or I change down and lift the right foot.
I also have a engine head monitoring temp gauge as well to watch the engine temp, this has an alarm when it gets too hot, but usually the airconditioning stops working first,( this is controlled by a heat switch in the engine block) and this also lets me know that I need to back off.
I do a lot of trips up north, towing the van, and the temp usually runs at 350 to 550 degrees C, again I watch the EGT gauge.
Every 2 years I have the radiator and cooling system flushed out and new coolant added and I also have a water loss alarm fitted as well.
I lifted the bonnet 20 mm all round to allow a greater air flow and with all this I have been towing many years now and she pulls like a train and I love her...reliable plus.
Thinking of trading her in for the 4.5 v8 version which has lots more power but it's hard to let her go, they grow on you.

the egt guage is the best investment youve made soo far.

500 is fine..

a oil cooler, and intercooler would be good..

keeps the oil cooler, and the intercooler will do more again..
but you will need to get dynoed to make the most of it..

if you want some serious grunt..
well your getting the intercooler..
make sure when you want to more stick, keep custom turbos in perth in your mind.
that guy is making turbos haul ass..
even the 1hz.. all the way to the 4.5td v8 in the cruiser..

power to burn....
tow monster

I think from memory you were putting a larger radiator in I could be wrong though. Has the turbo been tuned by someone who knows what their doing that could be the main problem, is your air filter clean, is the radiator cooling fan cutting in correctly. Do you have the factory snorkel if so doe's that supply enough air now & make sure there are no splits in the flexible intake hose on the motor is the exhaust standard or larger to help it breath do you have larger tyres on the troopy just some of the many things that can make it run hot. A front mount is a lot more effective if you are serious about cooling the air and yes a bit of mucking around to set up with the pipe work but worth it in the long run.

An intercooler will not help your EGT one bit, the only advantage it may have is it will produce denser colder air helping your fuel burn more efficiently making it run a bit more leaner.

By getting the Landcruiser without an intercooler dynoed and the fueling corrected for the idea burn will be more beneficial than an intercooler for lowing EGT and engine temps.

You have to find the cause of the overheating and rectify that first before looking at other add on bits.... bit like having one leg shorter and getting a special pair of shoe to compensate when all along it was you back that was out causing the problem.

Hey Coogs,
I have a 105 series Landcruiser 2004 and went the whole hog last year, turbo, top mount intercooler, 3" exhaust, ETG, and dyno tune. I am in Darwin and the average temp here is 32 degrees. I tow an off road camper trailer at about 1.5 tons fully loaded and at around 115 kph the ETG sits at 350 deg. If I need to pass a road train, and I can do it easily in top gear and the temp never goes past 420 deg even when hitting 120 kph (130kph speed limit up here).
I purchased all the gear from "Cross Country 4X4" in Adelaide (no association what so ever) and received the best service and no end of help and advice from them. Talk to Jon or Grant. I highly recommend them.
Make sure you install an oil catch can to keep the oil sludge out of the intercooler!
I fitted a "Mann Hummell Provent 200" oil air separator, works perfect.
I did the lot myself (except dyno tune) for $4700 including dyno tube, although I got ripped off a bit on the dyno tune.
The Cruiser is now an absolute pleasure to drive.

Noel K.

hi,
a bit late with reply ? but similar problem with troopy, found viscious fab hub slipping
removed hub & add two tubes of silicon fluid fixed.
helped ?
seeya
ray