1HZ injector pump!

Wouldn't have thought that advancing the pump would cause the overheating.
My Troopy had the same problems, running hot and cutting out the aircon, did everything I could, same as you.
Ended up taking it into garage thinking that I must have had a cracked head/block, turned out to be the thermo fan had carked it.
Hope it is something as simple for you.

Cheers,
Dennis

If the pump is overfueling than you will get overheating - no mater how good your cooling system is.

Do you have a pyrometer fitted??

Looks like you have covered all the basic cooling system stuff (except changing the radiator hoses which is highly recommended and also the the viscous hub that runs the fan!) so that leaves the tune of the engine.

Take it too a good diesel mechanic and get it tuned and the fuel adjusted so that your EGT temp (post turbo) is no more than 550 deg C.

cracked head

is youre engine fan on the right way

99 out of 100 1hz's that do this need new oil in the viscous fan.....this is where a forum helps....$27 from Toyota and 1 hours work. Buy a electric fan and install it up front if you have room, connecting it to the air compresser and your air will also be colder.

THE VISCIOUS HUB SHOULD BE REPLACED OR REPAIRED HAD THIS PROBLEM IN PAST WITH 2 FREINDS WITH OVER HEATING UNDER LOAD THEY DID ALL OTHER THINGS AS WELL VISCOUS HUB FIXED PROB
CHEERS REGGY2

Yes one thing i forgot to mention was that i had purchased a new fan from toyota but it was non genuine.
So then i got my old one and got the viscus fluid from black toyota in warwick QLD pulled it appart and filled it till it was full about 1 and a half tubes i used.
Made no difference!
As for a cracked head, nope had the head off last year because it had a leak at the back of the head with oil.
had it checked he said no problem! new gasket and no more leaks.
Dont loose any coolant at all.
As for the hoses well they are 3 years old. so ok maybe i will replace them. but still why does it get hot at idle when aircond is on?when i say hot it creaps up about 2/3 from half way then auto aircond switches off and engine goes back to normal opperating temp which is just under half. then it resets and aircond switches back on and within 2 min the temp starts to rise!
Im frustrated and it has cost me thousands!!!!!!
My partner told me to stop working on it or she will leave me!
Gee ill miss her!

the head has to be pulled apart ( valves taken out ) to inspect it properly. the other thing maybe your turbo water line is getting gas in it from the exhaust side of turbo. i dont know how the water circulates once its in there, but if you have ran out of ideas maybe its another thing to check.
are the fan blades on the right way. may sound silly .

Iccey, Looks like you spent a bit of coin and probably lost a bit more hair over this problem mate, are you looking at the original temp gauge ? why not try a VDO water temp gauge or similar, maybe its a faulty gauge.

Also depends where you are Mike Vine turbos (Brisbane) does some quality work and will make sure its all ok for you, there was also a guy in cairns ray(doesn't ware shoes)?? if i find the info i will pass on.

Hope you get it sorted.......Steve

yes thanks, the fan is working in the right dirtection sucking air from the front.
Secondly i have 2 temp guages would you beleive and both are seperated.
First one is under the inlet manifiold and that one goes to the guage inside dash, second one is for the Aircond which is off the top hose housing that goes into the radiator. now if the temp gause in the dash starts to rise but the aircond didnt turn itself off then yes i would suspect it was the guage.
but as soon as the dash gauge goes to nearly 3/4 the aircond compressor stops untill the gauge reads back to normal.
so there are 2 different guages working seperately.
i know this because i disconected one of them and the guage in dash worked but aircond stopped.
when i disconected the in dash one, aircond worked but dash did not.
so im pssitive it isnt the guages.

EGT guage is located 4 inches after the turbo on the exhaust side.
On the highway 100 kmh it hangs around 240 -260 c
i was told by the turbo guys i can get it up to 550 c but not for long periods. i cant even get it to 500 c too much power and i dont want a ticket for speeding.
im thinking about the david craig electric water pump. anyone with experience with them?

Hi Chris,
Have been following your posts with interest. We have a 1HZ which we have recently fitted an intercooler to - & have exactly the same problem as you! Fine on cold days, but when it starts heating up a bit - up goes the temp gauge. We think the intercooler was the straw that broke the camels back - has just pushed it over the edge. We have just started down the same path as you & have fitted the egt, boost gauge, tested & replaced the thermo fan. About to replace the radiator, hoses, thermostat & water pump, remove the driving lights, etc, etc.
Ours also overheated prior to the intercooler, but only on one particular hill, but now more frequently.
Let us know if you manage to fix your problem, might save us some $$!!!
Wayne.

iccey,
I have a friend who had a similar problem. He added a small radiator not much bigger than a heater element to his cooling system, mounted in the centre section of his bullbar. It solved the problem. He said that he felt the cooling system just did not have sufficient capacity once he turboed the motor. He has since sold the vehicle, but I could put you in touch with him if all else fails.
Regards,
Walkabout