GQ shorty runs hot

[daves]

Hi,
My mate has a GQ shorty 4.2 petrol that gets hot when we are out 4bying,it runs fine on the street just gets hot when we are going slow on some tracks,It has thermo fans instead of the original clutch fan,he has flushed radiator and done full service but still gets hot,any help would be much appreciated,

Thanks from Dave

[Diesel-Mate]

Your thermo fans my not be speeding up with the increasing heat. Check to see if is or isnt

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[boots]

Waterpump impella might be shot . Thats what I would be looking at .

[Diesel-Mate]

X2 on the water as I think about it also your bottom hose from the radiator might be sucking flat make sure its got a steel spring inside it

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[threedogs]

Are you only running thermos or thermos as well as oe fan, not sure of model but you should be running twin ea falcon fans.pulling
if you have fans both sides of the radiator your looking for trouble, no, muck in a cooling system. make sure your radiator cap is correct
type and new belts are in good nick and your thermostat is new and Oe Just doesn't sound like all the boxes are ticked, Things like is thermos fan working,
X 2 with boots check water pump cheap to replace.. but sounds like fan not cooling enough allowin water to not recover enough

[daves]

Cheers for all of your advice I will let my mate know and will let you all know if he sorts it out.

[threedogs]

Bog holes could have stuffed your radiator as well.

[Goat]

Make sure that your radiator isn't blocked. I've just gone to hell and back with a dealership who couldn't diagnose a blocked radiator. They flushed it, pressure flushed it and still came up with the excuse that it was overheating because the driving lights were "blocking the airflow". Took it to a radiator repair mate who felt the radiator, said "she's blocked, mate", ripped it out, and lo and behold - 80% of radiator blocked. He cored it (no amount of flushing was ever going to loosen the sh*t that came out) and I haven't had an ounce of trouble since. And the Patrol is only just over 2 years old.

[threedogs]

Good to hear from you Goat, taking it all is sweet as down your way, say hello to Mrs Goat to please.
Back to the radiator make sure there's no mud blocking air flow ' if in doubt re rear above post , last
count about 25 pages I think, because someonr "THOUGHT" is was ok.

[Goat]

Mrs Goat is just fine, thanks, threedogs. And the Patrol is going like a charm. Hopefully the extra warranty given by Nissan and the dealer won't have to be used!

[gaddy]

I had this issue when i got mine , picked the car up changed all the oils and headed to inskip towing the next day , I thought it was running a bit warm , not hot though , when i was cleaning the the car when I got home i always hose out the core as they do suffer from corrision in the salt air , and was amaised by the amount of mud that came out , now sits at about qtr on the gauge no matter what we do or tow . always hose out the core .

[Robo]

A mate of mine gave me some advise some yrs back.
He's a radiator specialist mech.
Remove radiator "say" once per yr or 2 , clean flush etc, and repaint it.
This should add yrs to it's life.
Radiators paint is constantly being sand blasted, so to speak.
Repainting, re-protects the core.
Been doing it for a long time now and I recon he's dead right.
obviously were not talking about modern alloy rads.

cheers

[vips_one]

Im not sure weather your model in australia in using it, but don't forget to check out the thermostat if applicable

[Rustyboner81]

Did yous back flush the engine block?
Drain and remove radiator flush it out in both directions untill clear water comes out.
Remove thermostat and drop in boiled water and see if it opens properly.
Flush the engine block back flush first to losen crap and again flush both ways untill clear.
Reassemble and top up coolent with fresh coolent.
Run the engine with the rad cap off and the heater switched on. (low fan, could need to bleed cooling systems correctly)
Maintain around 2000rpm untill the thermostat opens and top up level again including the expansion tank.
Check radiator cap there are set to open at a certain pressure. I believe its 0.8 atmospheres. Just go to nissan with vin number and get oe part. (oe = original equipment).

You could just take out the thermostat completely and thrn see if she gets hot.

Hope this is a help to you buddy

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[daves]

Thanks to everyone for all your replies my mate has had his radiator cleaned out has also checked hoses and thermostat and fitted some thermo fans of a vt commodore that he modded the shroud on to fit over the whole core.We are going out next weekend for a fourby so i will let you know how it goes.

[daves]

All sorted it is fixed,thanks again to everyone who replied,