Isuzu Trooper Owners Club UK™

666 · Posted: Mon Jun 09, 2008 14:24 Post subject: Overheating

Hi all,

Got an overheating problem, damn thing goes near on into the red when underload normaly on a gradient, cant get no heat out of the heater though Confused

just seems to blow cool air Sad

Have flushed it through over a couple of hours but still no different Evil or Very Mad

Could it be the water pump or just the thermostat? Would taking the thermostat out highlite the problem, or cause any problems Embarassed

?

Cheers

Mark
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UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

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dxmedia · Posted: Mon Jun 09, 2008 14:28 Post subject:

If the stat was jammed open it would take an age to heat up, if it was closed youd never get heat to your interiour heater.

Try taking the stat out and, as you say, see if it makes a difference to the running.

I take it you've jet washed the rad down on both sides after Kirton?
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Gary H · * Joined: 11 Apr 2008 Posts: 10 Location: Watford

hi mark, if youre gonna be taking hoses of to remove stat it might be worth taking rad out aswell and give it a proper wash, took mine out on saturday, it took 15 mins to get water running through the fins to come out clean and i'd already washed out 3 times previously whilst it was fitted to the car, 1st time was at yours on the way home from devils pit.
have you checked to see if the viscous coupling still works properly, could stop mine with 1 finger even with temp gauge in the red.
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666 · Posted: Mon Jun 09, 2008 17:16 Post subject:

It was overheating on the way up to Kirton Sad

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UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

markymoan · Posted: Mon Jun 09, 2008 17:20 Post subject:

5 mins to whip the stat out, if the heater isnt working it sounds culprit.
Check the top and bottom rad hoses when its hot to see if one is cold Wink

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Philp · Posted: Mon Jun 09, 2008 17:47 Post subject:

Also check the condition of the rad itself, mine overheated on hills and over 70mph, turned out half the fins had rotted away!
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

666 · Posted: Mon Jun 09, 2008 22:19 Post subject:

Thanks chaps, radiator is not that old and is a large frontera rad, not the smaller trooper rad Shocked

Will take thermostat out and let you know what happens Wink

Cheers

Mark
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UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

:::Matski::: · Posted: Tue Jun 10, 2008 8:06 Post subject:

My moneys on the stat.

*fingers crossed*
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666 · Posted: Tue Jun 10, 2008 8:49 Post subject:

Will let you know when i can be bothered to do it Embarassed

Weather is nice, think i will make the most of it and go sailing tonight instead Cool

Cheers

Mark
_________________
UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

666 · Posted: Tue Jul 15, 2008 16:20 Post subject:

Well i finally got around to removing the thermostat a couple of weekes ago and yes it seems to have settled down now, no more overheating! Strange though that when i put the thermostat in hot water it seems to work Confused

So my question is now, would there be any long term issues with having no thermostat fitted? I cant think of any, how about you?

Cheers

Mark
_________________
UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

Philp · Posted: Tue Jul 15, 2008 17:15 Post subject:

Yep, come cold weather it'll take longer to heat up and so cause more engine wear, a stat is less than a fiver so not worth running without one IMO. It may also be masking another problem like a duff rad.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

666 · Posted: Tue Jul 15, 2008 18:19 Post subject:

The rads in pretty good condition, less than 18 months old at a guess!
I just dont understand why its fine without it yet over heats with it, yet in hot water it seems to work Confused

Will bung a new one in and see what happens Wink

Cheers

Mark
_________________
UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

markymoan · Posted: Tue Jul 15, 2008 18:23 Post subject:

It could just be opening wrong, from memory the 2.8 stat starts to open at 82c and is fully open at 95c, if its not open till the water is boiling then bingo Idea

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666 · Posted: Tue Jul 15, 2008 18:26 Post subject:

TBH i didnt check the tempreture it opend at, just stuck a pan of water on to the largest gas ring on the cooker Laughing

Cheers

Mark
_________________
UK's First off road tested fully live axled Frontera
Now running an Isuzu 2.8TD

Mac Challenge 2009 Team 01

markymoan · Posted: Tue Jul 15, 2008 18:31 Post subject:

Thats what I did, my 2.8 left here without a stat
Then I read the manual Laughing

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