Further to Hilux problem, overheating

Does everything electrical stop? Or only the airco & radiator fan? Is the radiator fan blowing when it starts overheating?

Cruiser Crazy

Twinkles, A brand new radiator was "25% gunked up" in only 6 months ? What was the nature of the "gunk" ? Were you referring to the inside of the radiator ?

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Had a similar prob on my hilux and cut a LONG story the bottom tank has very little clearance took it to the radiator guy and he increased the clearance to 25 mm and bingo, best $100.00 I spent,
regards,
Dave

A common cause of sand like gunk is that the engine block and heater system havent been flushed out enough when replacing the radiator and coolant and the cooland used was incompatable with the old one. Do a search on a few forums on incompatable coolants and read the horror stories about the damage that can result from the this causing blockages in new radiators.

are you sure it is caused by the A/C cutting out . !!!! maybe the A/Con is sensing the engine temp getting to high , some systems these days have a thermal cut out or something similar to help protect engine , something doesn,t make sense when A/C cuts out it reduces the load on the engine
mechpete

Age of the car !!!!!!!! What a wank. When I worked for Toyota we had issues with some of the imported vehicles when they had there services where the coolant was due for a change, cressida's were the worst. The coolant that they come into Australia was no compatible with the genuine coolant we use to use and if not totally flushed out properly including heater core, block etc the two would miix and the radiator would end up with a gel type substance and was generally blocked halfway across radiator virtually blocking it. It would have blocked totally but obviously customer would bring back in before any damage was done. The only way to fix it was obviously pull out the radiator send off to get cleaned out, then when it come back we would flush the blocks, heater cores, put a flush through them (would do this a few times) then send radiator off again to get any possible residue out. Did you always use genuine coolant but the smash repairer has used a cheapie one ?? Makes me wonder why it was blocked 25% with gunk (presume he's talking internal ??).......... Air con cutting out would not cause it to over heat. If anything it would be helping to make the vehicle run cooler as the condensor (in front of radiator) would start to cool down when air cuts out. Did they put a genuine condensor back in not a non genuine. I had an issue years ago where I had to replace the condensor in my corolla, I put in a non genuine one and bloody thing ran hot after that been fitted, took me a while to work it out but it turned out the cooling fins on the non genuine part ran the opposite way to the radiator which was restricting the air flow. I purchased a new genuine part which fixed the problem instantly, wasnt cheap. Sorry for the long post just trying to think of possible reasons...... WHG

G'Day Twinkles

Think Head gasket,or cracked head !!!! Cause may not be related to accident???


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