Overheating Troopy

Coogs.

Install a EGT guage and drive to that. Expect a minor cardiac arrest when you first fire it up and see what the EGT guage is telling you.

Regards

DD

coogs,
in the later tojos, Toyota put in a radiator that was about 50mm longer. That was fitted to the 78 series and did give much more cooling to the narrow fronted vehicle. This is the Toyota Part No. 1640017360. I think these were fitted to the vehicles around 2001. I know this radiator made a big difference to mine and she never ran hot.

Another thing is now you have more power you maybe leaving it in to tall a gear and it is over fuelling. Just try easing up a bit and coming down one or two gears, that will also allow more air through the radiator from the fan. I never let my old girl get below about 2200 revs on a climb.

If that fan is working ok you will differently hear engage when the temp rises.

I am sure you would have checked the normal things like the thermostat.

I'm surprised that you didnt put in an intercooler when you upgraded to the turbo. It might well be worth considering as a solution to your overheating. The turbo works by compressing the air thats going into the inlet manifold so that more oxygen is gulped in on each inlet cycle, the trouble is that when air is compressed it gets hot. You are probably increasing the inlet air temperature by 80 degrees when under load so its no wonder the radiator is struggling to cool it down.
A well designed intercooler can get the temperature of the inlet air back down to a few degrees above ambient and the boost in power from the intercooler would be significant and noticeable.

G'day Coogs, for what its worth had an identical problem .After many $$$.s New head pump reco the problem was that the rubber elbow on the turbo inlet had deteriorated and had expanded to 2-3 times it's normal size. Under hard acceleration {hills} the elbow would collapse and restrict the airflow to the turbo causing power loss and. immediate temperature spike .Backing off and everything reverted back to normal.On the flat @2400 rpm no problems. The elbow should be 2 1/2 " Dia. hope this may help. Regards john y.

First i would Upgrade the radiator.it will make huge difference, but dont buy the cheap chinesee ones.PWR radiators recommended, its not cheap but worth it.it did solve my overheat problem . Also think about oil cooler and intercooler as well.

aussie desert cooler street and strip full alum. one works a treat

stick with the factory brass setup, fit a bigger radiator, either up the core or a larger radiator agian.

the ally ones are not the go.
not many shops can weld ally, and they fatigue crack soo much easier than a brass radiator.
your better off with a natrad radiator.
australia wide backup, quality brass radiators.
and friggen cheap when they clean them out.
charged me a 120.
they pulled the radiator out, cleaned it, and new coolant.
i couldnt even do it for that.. soo CHEAP.

ally radiators have no place in 4wds that go offroad.
corrigations, spoon drains and washouts would kill a ally radiator.
then theirs the cost.
way too dear !!

other option is fit a oil cooler to the engine to assist engine temps.
to help it out some.
they make some pretty cheap ones now. well priced.

Coogs,

So, you have your EGT pickup pre turbo?
Assuming so, then your numbers are all good re the turbo. If you are reading 500°C POST turbo, that's too much!

Seems like you're fuelling is set about right with 9psi on a turboed 1hz, and the EGT you are getting.

Installing an intercooler would reduce your EGT by possibly 100°C. Whilst the EGT are not a problem at the moment, EGT are also an indication of load on the engine. If you can reduce the load on the engine, and increase it's efficiency, it may very well help keep the coolant under control. An intercooler would help achieve this. It would also block airflow to the radiator - unless you got a water to air unit. Even then the WTA radiator needs to dissipate a lot of heat and will block air to your radiator.

Is your fan clutch working correctly? Do you hear it roar when the temps rise? Of course the fan coming on adds load to the engine whilst it is trying to give more airflow, increasing pressure on the cooling system.

There is always a pay off with power, and getting rid of the heat. Reducing your load, changing down, slowing down, will be the cheapest option for what otherwise seems like a reasonable setup. You might have simply found the limit to a happy setup.

When I added a 600mm FMIC to my HJ61, it covered the entire radiator. But because it aided engine efficiency, I didn't notice any decrease in cooling system effectiveness. I also have a high performance GTurbo and 3" exhaust, run 19psi and maximum fuel supply from the IP in my 12h-t. It tows well with 470nm of torque, but has it's limits.

If you had installed a full 1HD-T with it's direct injection, factory turbo, oil squirters to keep the pistons cool etc etc, you may have had a better outcome, or a 1HD FTE, or a V8 etc etc - but that's not what you've got. Maybe your expectations to tow a 3T van at 100kmh with ease are unrealistic. How much you're prepared to spend on an intermittent problem that can be controlled by your right foot is only a question you can answer.

Tim

Thanks for all the great advice, I have decided to get an intercooler Air to Air and it gets mounted under the bonnet with a bonnet scoop fitted to direct air straight into the intercooler. The bonnet scoop is a patrol type scoop with a rubber seal to join bonnet to intercooler when bonnet is closed. Has anyone got one of these fitted on a troopy or Toyota landcruiser and how efficient is it in dropping the EGT's down? What price is it fitted roughly and where or who did it. I am in Brisbane. If someone has a pic of one could you email it to me please.

Cheers
dirtydeedsdingohire@bigpond.com