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Cooling problems

General Tech Talk

Moderators: toaddog, TWISTY, V8Patrol, Moderators

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Posts: 65
Joined: Fri May 07, 2004 12:12 pm

Cooling problems

Post by PSI3y »

I have the problem of when 4x4ing at low speeds with highish rpm the temp climbs. This also happens travelling at low rpm and high freeway speeds. Currently there is a 3 core radiator with two ten inch pusher fans and no engine fan. The gap between engine and radiator is about 10cms. Also the upper radiator hose may present some restriction on the flow.
Does this problem sound more like a water flow or air flow problem, or is it just a matter of this system not being efficient enough?
Is there any way of telling what area the problem is or do I just start eliminating possibilities? Does anyone have any experience here?
Cheers
Posts: 713
Joined: Tue Nov 05, 2002 2:12 pm
Location: Brisbane

Post by Hybrid »

What engine? I assume an engine swap seeing as you have no engine fan.
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Joined: Fri May 07, 2004 12:12 pm

Post by PSI3y »

it now has a 5mge. the front area of engine is quite flat so radiator is uniformly ten cms from engine
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mav
Posts: 320
Joined: Thu Jun 26, 2003 1:53 pm
Location: traralgon victoria

temp

Post by mav »

how does it go at freeway speeds with higher revs (lower gear)???
if this makes it better it sounds like a water flow problem.
what about the standard stuff ?? is there a thermostat??
is there much room around the motor and in front of the radiator for air flow?? pics???
see ya mav
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Joined: Thu Jul 15, 2004 9:21 am
Location: Townsville

Post by Dane »

If you already think that flow is restricted through the top hose, it probably is. Fix it. Is your radiator in good nick? Are the cooling fins clear of mud and grass seeds? Get it pulled apart and cleaned. If your car gets hot at highway speeds but the cooling fins are clear, it is probably not just an air flow problem caused by the fans, because they only matter at low speed. Does the radiator have the capacity to cool your motor? Fix the things you already suspect and work from there. Cooling issues can be a bastard so you need to get your equipment in as good a condition as possible.
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Location: Central Queensland

Post by BundyRumandCoke »

I agree with the radiator. Get it internally cleaned, not just a chemical flush, but get it disassembled, and the cores reamed and cleaned. It doesnt take much to block them, even if you run the correct coolant.
Mud makes excellent toothpaste.
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Location: Geelong

Post by HSV Rangie »

Do you have a good shroud around the fans so that all air flow is directed through the rad.

I have found this to be critical on all vehicles played with.

Michael.
Mitsubishi 2010 NT DID Pajero wagon, Factory rear diff lock, Dual batteries, ARB bar, winch, Mt ATZ 4 rib tyres.
1986 RR.
Custom suspension links etc.
HSV 215 engine.
4.3 diffs.
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