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Heater not hot.


 
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kayak
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Joined: 06 Feb 2008
Posts: 13
Location: Leicestershire

PostPosted: Mon Oct 15, 2012 7:56    Post subject: Heater not hot. Reply with quote

Hi all.

Fairly new on here so be gentle!

Ive got a S plate crewcab TFS 2.8.

Regardless of wether the it has been running all day or not the temperature guage never really moves much above cold and the heater never goets hot.
Also as you drive along the faster you got the temp guage goes down, also the faster you have the fan on the colder the blown air gets!

I think that the previous owner used to run the engine on more or less neat antifreeze by the looks of things but surly this would still get hot at some point. I drive it 20 miles to work every day and its still not reading or blowing hot by the time i get there.

Could it be as simple as a dodgy thermostat?

All help appreciated chaps, i recon its going to be a cold winter this year!

K.
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griffter
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Joined: 07 Dec 2010
Posts: 955
Location: west sussex

PostPosted: Mon Oct 15, 2012 9:10    Post subject: Reply with quote

yes thermostat change
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griffter
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Joined: 07 Dec 2010
Posts: 955
Location: west sussex

PostPosted: Mon Oct 15, 2012 9:34    Post subject: Reply with quote

think your right about a cold and snowy winter!!! i hope Laughing
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Rhanagar
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Joined: 12 Jan 2010
Posts: 4861
Location: Preston, Lancs.

PostPosted: Mon Oct 15, 2012 12:06    Post subject: Reply with quote

I would change the thermostat (Quinten Hazel QTH411K 85 degree one from Halfords) and make sure you have the correct 50/50 mixture of blue coolant. Works on my 2.8 a treat. These engines never get hot (mine never rises above the 1/3 mark even when towing a 16' fully loaded caravan up and down hils in a 2 ton truck - total weight about 3 1/2 tons) unless you have an issue somewhere like blacked radiator or such like.

Another possibility is the viscous fan is jammed on all the time never letting the engine get to temperature.
Another problem could be the heater matrix is blocked.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

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florin_cars
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Joined: 23 Apr 2015
Posts: 10
Location: Stoke on trent

PostPosted: Thu Dec 15, 2016 11:36    Post subject: Reply with quote

Got the same problem on my 3.1td Trooper LS. It worked fine, the temp gauge was always reading a bit under 1/2, the heater was blowing hot after about 10 mins of driving in the winter, I was happy

Now, since 3 weeks ago the temp gauge is reading just about 0, the heater blows some warm(ish) air and I have to fix this problem as I don't really think it's a gauge/sender problem because the fuel consumption got up and that means that the engine is not up to the working temperature.

The viscous fan I think it's preatty stuck on but it doesn't botter me for now, it's like that since 2 years ago.

The most sure thing is the thermostat  or what do you guys think of this?
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florin_cars
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Joined: 23 Apr 2015
Posts: 10
Location: Stoke on trent

PostPosted: Thu Dec 15, 2016 11:42    Post subject: Reply with quote

No edit function  ...wanted to say that the temp gauge is reading just ABOVE 0 Sad
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Rhanagar
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Joined: 12 Jan 2010
Posts: 4861
Location: Preston, Lancs.

PostPosted: Thu Dec 15, 2016 12:13    Post subject: Reply with quote

Pretty much the same engine .. put a new thermostat in as described above (Quinten Hazel QTH411K) though you will find them cheaper on eBlag Very Happy
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

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Rhanagar
Lifetime member
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Joined: 12 Jan 2010
Posts: 4861
Location: Preston, Lancs.

PostPosted: Thu Dec 15, 2016 12:15    Post subject: Reply with quote

... also make sure the coolant is topped up with the right mix of anti-freeze.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

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gderek7
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Joined: 30 May 2017
Posts: 22

PostPosted: Tue Jun 13, 2017 10:08    Post subject: Reply with quote

Had the same problem, and I just changed the thermostat.
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