toyota prado v6 overheating

Submitted: Wednesday, Oct 01, 2003 at 14:38
ThreadID: 7533 Views:6710 Replies:8 FollowUps:7
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Hi have just completed trip to dalhousie springs and prado had terrible overheating problems in high range travelling at 40 kmh.problem also arose on palm valley trip an car actually boiled and then meneenie loop road in 2wd car just had new water pump fitted and was towing small camper trailer in 35-40 degrees is this common i feel it needs a thermo fan but not sure. not losing any coolant ?
any ideas or referalls
regards
peter
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Reply By: Truckster (Vic) - Wednesday, Oct 01, 2003 at 15:03

Wednesday, Oct 01, 2003 at 15:03
It sounds like a 1 off.. Theres heaps of playdo's towing without Thermofans.

The radiator is clear of bugs, adn lights etc? You dont have massive spotties blocking the radiator? Radiator isnt full of bugs and seeds??

Im presuming this has all been done before the water pump was replaced?

Whatr year Playdoe, and what flavor?
AnswerID: 32488

Follow Up By: Willie - Wednesday, Oct 01, 2003 at 15:38

Wednesday, Oct 01, 2003 at 15:38
Hey Truckster,

I thought you were supposed to be working or is it a slow day :-)

Cheers,

Willie
Never a dull moment
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FollowupID: 23220

Follow Up By: pete - Wednesday, Oct 01, 2003 at 16:09

Wednesday, Oct 01, 2003 at 16:09
radiator is clean but i do have two 8 inch rectangular driving lights bull bar mounted which is in front of radiator
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FollowupID: 23224

Follow Up By: Truckster (Vic) - Wednesday, Oct 01, 2003 at 16:12

Wednesday, Oct 01, 2003 at 16:12
Im on $28 an hour for this :D
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FollowupID: 23226

Follow Up By: Willie - Wednesday, Oct 01, 2003 at 16:22

Wednesday, Oct 01, 2003 at 16:22
About time you had a bit of good luck :o)))
Never a dull moment
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FollowupID: 23227

Reply By: Member - Bob - Wednesday, Oct 01, 2003 at 15:08

Wednesday, Oct 01, 2003 at 15:08
Is the thermatic fan engaging? Bob
AnswerID: 32490

Follow Up By: pete - Wednesday, Oct 01, 2003 at 16:11

Wednesday, Oct 01, 2003 at 16:11
the fan is only a viscous coupled belt driven fan and it works on starting for 10 odd seconds
regards
peter
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FollowupID: 23225

Follow Up By: Member - Bob - Thursday, Oct 02, 2003 at 08:21

Thursday, Oct 02, 2003 at 08:21
Thats what I thought Pete. Sometimes they don't engage when they should. They contain fluid which may need to be replaced, or maybe the whole unit. You could test it on a warm day by running the engine up to normal temp, switch on air cond and let it idle. As temp rises the fan should start to spin.Bob
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FollowupID: 23278

Reply By: Willie - Wednesday, Oct 01, 2003 at 15:09

Wednesday, Oct 01, 2003 at 15:09
If you have just had a new waterpump fitted there could be a problem with the thermostat.
Cheers,
Willie
Never a dull moment
AnswerID: 32492

Reply By: flappan - Wednesday, Oct 01, 2003 at 15:51

Wednesday, Oct 01, 2003 at 15:51
What year model . . .

the early ones had reports of overheating . . . These temps wouldn't help.
AnswerID: 32495

Reply By: pete - Wednesday, Oct 01, 2003 at 16:05

Wednesday, Oct 01, 2003 at 16:05
the vehicle is a 1998 v6 auto with 70,000 klm it only runs a viscous coupled fan and i do have two 8" ipf driving lights which are bull bar mounted.
regards
peter
AnswerID: 32498

Reply By: Phil G - Wednesday, Oct 01, 2003 at 17:11

Wednesday, Oct 01, 2003 at 17:11
Unusual for any Prado to overheat. My guess in likely order would be
#1 The viscous fan is not engaging. BTW, these fans are much more efficioent than any thermo fan. You don't hear the fan on startup. You should hear it engage (roar sound) when the the temp gauge has risen above its normal level. Its hard to test.
#2 Radiator is blocked. Usually caused by coolants precipitating because of incompatibility between different brands of coolant. Only solution is to get it rodded by a radiator shop.
#3 Maybe the thermostat

It won't be the lights. Prados have heaps of radiator area.
AnswerID: 32508

Follow Up By: pete - Wednesday, Oct 01, 2003 at 17:50

Wednesday, Oct 01, 2003 at 17:50
thanks phil i will get it checked out.
regards
peter
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FollowupID: 23237

Reply By: Mick - Wednesday, Oct 01, 2003 at 23:06

Wednesday, Oct 01, 2003 at 23:06
I've had that model and never had problems. If all is working correctly it will cope with anything including towing a caravan with aircon on full in 40C. Why was the water pump replaced??? Nothing can go wrong with them other than leaking! Check thermostat or even replace it if you can't check it as it sounds like it's not opening correctly. Lights would make very little difference as the fan will still suck the air through. Don't even think about fitting a thermo fan as aftermarket thermos give grief .... just get the system working properly. Also check that the fan belt isn't loose or slipping.
AnswerID: 32563

Reply By: Member - Russell - Friday, Oct 03, 2003 at 14:22

Friday, Oct 03, 2003 at 14:22
I have a 97 RV6 with two IPF 800 lights directly in front of radiator, and the Toyota mesh screen thingy as well. Never had a problem. Should be fairly easy to isolate the cause with the guidance above. Good luck.Russell S
Prado RV6
AnswerID: 32696

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