AnswerID: 155154 Submitted: Wednesday, Feb 15, 2006 at 15:04
Thanks All for your replies, I have been doing some searching through the archives of this site on issues of running hot Patrols. many Thanks to people like Roachie for posting his finding and replacement items on his Patrol to try and cure this problem. Although after reading whats on Roachie vehicle "gadgets and gizmos" I think he needed to upgrade the turbo just to carry the extra weight....lol.
Bought the Patrol new in 01 and has always run
hot under load "towing Camper Trailer" so I have learnt to drive using the water temp gauge. (VDO Gauge on dash)
After searching through the archives for some time and many posts I see that this problem has not been resolved yet, Im not interested in getting the old girl to run
at 80deg under any load but I am interested to see if I can bring the temp down by 5 to 10 deg if possible. I guess I would like to strike a balance between the temp and the budget, make the changes but be cost effective.
I have fitted a new 3" exhaust and dump pipe to the bus and was amazed by the increase in the bottom end, from the 1000 to 1500 rpm range is a hell of a lot better. Will be looking at the turbo upgrade as soon a the budget can spare it hence my reason why I would like to knock the edge of the temp a little.
Have heard that the new Patrols run
a higher pressure radiator cap in an attempt to cure this problem but from what I have seen on the net the new Patrol still run
hot. I recall Holden did the same thing on the Commodores but did not upgrade the water heater inside the car, some major leaks occured inside the commodores. Hope nissan didnt make the same mistake haha
Thanks again all
Reply 6 of 8
FollowupID: 409138 Submitted:
Wednesday, Feb 15, 2006 at 18:34
My Turboed GQ runs cool all the time.
A few pointers which may help....
1.Obviously the Viscous fan is critical. If it is not working 100% when you need it you'll overheat.
2.Use the lowest % glycol Vs water mix you can get away with considering your winter temperatures. Water is a better coolant than glycol because it needs more kilojoules (or BTU's or what ever you prefer) to raise a litre of water by 1 degree than the glycol. I run
only about 10% glycol. If you can get away with no glycol then do so - but of course you need a suitable corrosion preventative. I use Redline's "Water wetter" additive which I believe helped considerably. See their website.
3. Radiator must obviously be clean internally as well as externally.
4. I tapped in to the heater line using a commodore heater valve, and added an extra mini radiator (using a heater core from the wreckers) fitted in my 'roo-bar, so that I always have water flowing thru the heater line instead of it being shut off when you are not using the heater.
5. I have an oil cooler fitted- figured it takes load of the internal heat exchange cooler near the oil filters.
6.Finally, I fitted a High flow thermostat, though I don't know how that compares with the genuine Nissan variety as mine went in the bin years ago.
Net result is an engine which NEVER runs hot even though I tow a heavy van and boat and run
12psi boost on my turbo.
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