overheating cruiser

yeah it is the 1HZ motor, no it doesnt have an intercooler i will look into those things
thanks
Brentos

Hi Gone Bush - just wondering why you say you are surprised it hasn't happened before. I know the 1HZ with turbo has a tendency to run high EGT if you aren't careful, but haven't heard of engine cooling issues. I have a 105 with same motor and turbo (no intercooler) and have not had any issues, including some pretty heavy towing and 'playing'.

Not disputing - just curious.

Cheers
Gerry

probably would work better with silicon oil, rather than gel. :)

Andrew

I have a 1HZ 4.2 and been in the same situation and still am!
Before i turboed the motor, it was doing that very same thing on the long hills.
then i put in the turbo and denco intercooler and does the same thing on ths same hill just the same. So nothing to do with the turbo.
Changed to the PWR aluminium radiator high performance made no difference.
Added 2 and a half tubes of viscus fluid to fan, Still the same! then i purchased a new fan hub thinking i didnt do the job right, and still no better.
had the head off and nothing cracked or damaged there!. i lifted the bonnet at the brackets half an inch to alow more air flow. still nothing!
Stuffed if i know, my best mate has the same cruiser as mine and he has an after market turbo with a denco and his never moves past half way on the tem guage, even pulling a 2 ton trailer flat out up the same hill! he even has his boost on 14 psi and fuel wound up. he said he has got the EGT around the 500 deg c mine only gets to 470 max.
Im with you mate, but if you do find some information about sorting this out do let me know!
Chris

My 105 is running 12 psi and my egt has gotten to 550 on the very odd occasion but this did not affect the engine temp at all, to my surprise.

You must has to push it a bit hard and hotter to get the egt to translate into engine temp increase, or perhaps sit on 550 for a while, which I never would do.

Have you looked at your water pump and thermostat? They say the water pumps on the 1HZs are really good and very few have problem, but if you are getting heaps of airflow and heaps of water circulating I think there should be a problem, seeing as you've already had the head off.

The only other thing may be the gauge, but that is along shot.

I know how you feel trying to pin down the problem and it is frustrating when you don't have money tree in the back garden...

Keep me posted!

Hi there Toyocrusa, yes I remember the same post, about driving lights been the exact problem.. I suppose if you think about it, if a certain area of the radiator is been blocked by the driving lights (lets say the centre of it where the coupling sits) the air passing through maybe only getting to the sides/top/bottom of the radiator and not to the centre so the viscous coupling will not be getting any air passing over it to detect the temperature of the air coming from the radiator there for it would not lock the fan in to pull the air through ??? Just my theory lol............Regards Steve M