The big girl is heating up

[pugsley]

Gday everyone iv got a 90 gq td42 aftermarket turbo fitted no intercooler. Along the flats the guage will sit between a quarter and a half. But give it a decent jump up and not towing anything the gauge goes up to 3/4 thats to hot for me. Also certain hills around here she gets to 3/4 whilst iv got no weight on at all. The radator is 12 months old, cap is good , thermostat is new. Before fitting the turbo i had no issues at all. Ive been told i need a bigger radator. Does anybody have any advice ?

[Bigrig]

Get a proper flush (high pressure) of the cooling system and throw in a cold thermostat (opens about 12 degrees cooler than standard). Do you have spotties etc blocking the grill? Less airflow, less cooling. What condition is the fan in? I.e no broken vanes, spinning up full on with the engine (the hub not slipping too much so that it struggles to get going etc)?

Other than that, I have the setup mentioned above, with spotties, air con radiator, turbo intercooler in front of the radiator and mine sits on about one quarter normally, but still heats up going up hills - climbs to about three quarters but then sits there (doesn't keep climbing).

[AB]

Hi mate, 3/4 isn't too bad but depends on what thermostat you put in.

Do you know what degree's your thermostat opens up at?

[pugsley]

Get a proper flush (high pressure) of the cooling system and throw in a cold thermostat (opens about 12 degrees cooler than standard). Do you have spotties etc blocking the grill? Less airflow, less cooling. What condition is the fan in? I.e no broken vanes, spinning up full on with the engine (the hub not slipping too much so that it struggles to get going etc)?

Other than that, I have the setup mentioned above, with spotties, air con radiator, turbo intercooler in front of the radiator and mine sits on about one quarter normally, but still heats up going up hills - climbs to about three quarters but then sits there (doesn't keep climbing).

yeah mate the spotties are them 170 strikers so there not really blocking much. Ive done everything you brought up there accept the cold thermostat um yeah il give that a shot thanks mate

[pugsley]

nar i dont mate big rig just mentented that so il give it a go thanks

[Bigrig]

yeah mate the spotties are them 170 strikers so there not really blocking much. Ive done everything you brought up there accept the cold thermostat um yeah il give that a shot thanks mate

Good stuff - the flush is not a bad idea either. Make sure if you do it's done properly (under pressure) to get the crap out of the engine cooling system itself.

Good luck with it!!

[pugsley]

thanks mate

[patch697]

If your going to flush your cooling system the thermostat needs to be removed, so if your going with a colder heat range that will be the perfect time to do a flush.

[MQ MAD]

Gday everyone iv got a 90 gq td42 aftermarket turbo fitted no intercooler. Along the flats the guage will sit between a quarter and a half. But give it a decent jump up and not towing anything the gauge goes up to 3/4 thats to hot for me. Also certain hills around here she gets to 3/4 whilst iv got no weight on at all. The radator is 12 months old, cap is good , thermostat is new. Before fitting the turbo i had no issues at all. Ive been told i need a bigger radator. Does anybody have any advice ?

The age of the radiator has nothin to do really with how efficient a radiator is
Go drive thru a heap of mud with a new rad and she could block up straight away
How much boost you running ???
Have ya tried turning the boost down a tad
As mentioned 3/4 on a 20 year old guage (is the guage working properly ???) isnt bad on these
Id be concerned if it went to 3/4 and stayed there or climbed,if it decreases then the cooling system is working,generally
Why it gets that hot, well boost would be checked,egts checked and maybe a rad flush by a rad pro,hose wont do a thing

[bobby-didge]

hey buddy my GQ 4.2TD did the same thing, it has the after market turbo aswell, i took it to the old fella that only works on patrols and he told me if i dont put a intercooler, when im going up big hills or towing i should back off the gas about 20-30% which will reduce boost and heat from the turbo. and the other thing i did which makes it run alot cooler i got rid of the clutch fan and put twin electric fans! next im putting a bonnet scope on the turbo side of the bonnet to push the hot air off the turbo and out of the engine bay. good luck with it!