gq verheating
Submitted: Wednesday, Dec 10, 2003 at 00:06
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REX
had our fist hot day in
adelaide to day (40) and on the way to work my temp gauge rose to three quarters got a bit worried radiator not blocked just had this done do the clutch fans have any problems and any idea on how to keep my td42 turbo from seeing red as i would like to plan a trip up north and im not going if i cant keep my cool
Reply By: Brian - Wednesday, Dec 10, 2003 at 08:18
Wednesday, Dec 10, 2003 at 08:18
Usually around the 200K klm mark the fan clutch needs doing. I was told that the fluid could be replaced so I paid $60 for this to be done. In my case it didn't work, so then it was a several hundred dollar job to get the clutch replaced, which in hindsight is what I should have done the first time.
Cheers
Brian
AnswerID:
39809
Reply By: tom - Wednesday, Dec 10, 2003 at 10:18
Wednesday, Dec 10, 2003 at 10:18
Sometimes on a hot day it is evitible that its going to boil the motor. Other options are runnin a pair of thermo fans from a late model GU.
Cheers
Tom
AnswerID:
39826
Reply By: Martyn (WA) - Wednesday, Dec 10, 2003 at 10:21
Wednesday, Dec 10, 2003 at 10:21
Rex,
Need more infomation, did the temp rise and stay there or did it drop off when you where moving? K's etc etc, anything else?Keep the shiny side up
AnswerID:
39827
Follow Up By: REX - Wednesday, Dec 10, 2003 at 10:39
Wednesday, Dec 10, 2003 at 10:39
temp rose then took a long time to come down again on the open road temp fine
FollowupID:
257466
Reply By: Flash - Wednesday, Dec 10, 2003 at 10:21
Wednesday, Dec 10, 2003 at 10:21
Three quarters is not a really a problem- if it goes no further.
However by far the most common problem is your viscous fan not working.
The ONLY way to really know if it's working is to listen for it when your engine is hot. If the fan is not making an obvious ROAR at revs when your engine is hot then it's not working.
You should be able to hear it while driving, but if in doubt stop and rev the engine.
No ROAR = stuffed fan clutch + overheating engine.
These can be rebuilt if in reasonable nick for a fraction of the cost of a new one.
Cheers
AnswerID:
39828
Follow Up By: cwebb - Wednesday, Dec 10, 2003 at 11:18
Wednesday, Dec 10, 2003 at 11:18
Hey Flash,
This roar you are talking about, is that the huge vacuum cleaner noise it makes on hot days? So how does it work, on a cooler days, does it more or less free spin, providing a bit of circulation, yet on hot days, is it supposed to really lock up and spin?
Cheers
FollowupID:
257473
Follow Up By: Flash - Wednesday, Dec 10, 2003 at 11:43
Wednesday, Dec 10, 2003 at 11:43
Yes, exactly.
Basically free-
wheels when it's not very hot, though you'll probably hear the "roar" when you first start for a minute or so. (Don't confuse that with normal operation)
Try starting your donk from cold and rev a little- you should hear the roar for a minute or so. Then the fan will slow to a gentle noiseless spin and should roar again when the engine temp gets above normal.
You CANNOT test it with the engine stopped by grabbing it with your hand.
Don't even contemplate grabbing it with engine running, unless you want to lose fingers/hand.
FollowupID:
257475
Follow Up By: Member - Melissa - Wednesday, Dec 10, 2003 at 11:54
Wednesday, Dec 10, 2003 at 11:54
Yeah, had a similar problem with our Pajero. 90% of the time the temp was OK even in the Top End during the west season. But if we were doing extended low range driving or on
the beach, the temp would rise. We thought this was fairly normal until one day my husband mentioned it in passing to a mechanic mate who straightaway lifted the hood and checked the fan. Sure enough it wasn't working right. Had it replaced and the difference was amazing.
:o) MelissaPetrol 4.5L GU Patrol &
Camprite TL8 offroad camper
http://members.westnet.com.au/flatdog
FollowupID:
257477
Reply By: Mick - Wednesday, Dec 10, 2003 at 11:10
Wednesday, Dec 10, 2003 at 11:10
Youd be better off driving up north in 40 deg. heat, as youll be sitting on highways or tracks keepin the air flowing. Sitting at traffic lights in town is where it is most likely to overheat.
AnswerID:
39833
Reply By: Big Trev - Wednesday, Dec 10, 2003 at 16:03
Wednesday, Dec 10, 2003 at 16:03
Had a similar problem with my Maverick TD42 back a few years in Tassie in summer for gods sake, I went to the only Nissan dealer in Tassie and asked for a mechanic who knew something about diesels (as most car mechanics don't). He got me to idle the Maverick up to normal operating temp, he then grabbed the fan and spun it backwards, which it obliged willingly. He told me that the viscous coupling was shot, so after $300.00 and fitting the new one myself in the main street of
Hobart - NO MORE TROUBLE! Diesels with a
well maitained cooling system are not all prone to overheating unless you work 'em real, real hard.
AnswerID:
39861
Follow Up By: Big Trev - Wednesday, Dec 10, 2003 at 20:22
Wednesday, Dec 10, 2003 at 20:22
I should have pointed out that if the coupling is OK that there is no way you can grab hold of it, let alone spin it backwards. But it does work, we were away with the in-laws in their Bravo, it was OK on the flats, got inot the hills and started heating up to boiling. When it cooled down enough I copied the Tassie mechanic and the goddarn thing spun backwards. The short stroy of it all was a mechanic put 3 brand new ones from Mazda on it and they all were faulty, so the mechanic drilled the coupling drained the oil, tapped the hole, refilled it with new oil. NO MORE PROBLEM. (as yet)
FollowupID:
257524