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[cleggy]

Got a 55 plate 3.0 cdr . When I'm towing the wrangler plus trailer , the temperature gage starts to go up but only on hills .had the same problem with my 3.2 shogun . I was told to put a new radiator on the shogun which I did and it did solve the problem but then the shogun got wrote off . Before I put a new radiator on at £300 compared to the shogun which only cost £180.00 can give me any other solutions

[Bishops Finger]

How much by? ie into the red?


First step is clean externals of the rad out with a hose...not jet wash...

[wildwood]

use mine for towing as well .not much else.... doesn't overheat but spotted water/rust staining near rad cap and res was empty..its happened a few times now....... looked at rad cap and reckon rubber perishing.. got a new one from Lighties and prob gone ............

so far.............

[Jonny Jeep]

Check/replace the rad cap first as already suggested since it's cheap. If you do decide to get a new radiator you can get a Nissens off ebay for a shade over £250 which is cheaper than the £300 you stated and good quality too.

[Dave69]

what weight are you towing and for how long up hills as this will increase the coolant temperature rapidly due to the strain on the engine for the towed load.

do you have a transmission cooler ? might be worth while adding a manual overide to the cooling fan so to pull maximum air through the rad during the tow up the hill from start to finish.

Motor manufacturers spec the rad pack assembly for cost which means they make it as small as possible taking into account a lug down test (towing heat build up time). this test doesn't realy match with real world conditions so what is happening on your jeep is perfectly normal but over longer periods of sustained towing will cause some concern as your experiencing.

[cleggy]

Mark Clegg
Cleggy
Registered:
10/Dec/04
My Ride 1
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Posted 15/Mar/12 21:34 
Looks like I've got a few things to look into . Posted this on 3 different sites and got 3 different answers
Cheers 

[Dave69]

post on four different forums and you will most likely get a different answer.

Increasing the size of the rad will obviously be a benefit but also making the cooling fan work sooner to pull more air through and improve the cooling. But remember this will lower the heat buildup in the engine and not the transmission so if you increase one you will have to consider both hence when you order a tow pack on a new vehicle they sometimes come with a transmission cooler.

what people have said in flushing the radiator and such like should be a matter of course after offroading but on a road biased vehicle it should be the case.
 
The manufacturers tow test is along the lines of a car strapped down on a dyno with a calculated load profile to simulate a towed load at a fixed speed. the driver then sits in the car (or robot) an puts his foot to the floor. The time the temperature takes to increase to maximum must be longer than a predicted time lapse.