Temp was OK but......
Discussion
I bought my Chim last July and so it was run on a few hot days. The temp guage sat at 90, went near 100 then the fans cut in and water temp dropped to 90 again. Just as you would expect.
I run the car through the winter with no problems.
Today with the sun making an appearance I went for a long drive. The temp guage now sits at 100 and goes up to 110. I switched on my heater full blast just in case and pulled over to check. Both fans were operating OK.
Any ideas why this has happened. My thoughts were a faulty temp guage sender or the guage itself.
I run the car through the winter with no problems.
Today with the sun making an appearance I went for a long drive. The temp guage now sits at 100 and goes up to 110. I switched on my heater full blast just in case and pulled over to check. Both fans were operating OK.
Any ideas why this has happened. My thoughts were a faulty temp guage sender or the guage itself.
Thanks for the advice.
It ended up being the thermostat stuck shut. The one replaced was also fitted incorrectly with the bleed valve at the bottom rather than upper most.
Anyone replacing the thermostat or otter switch should look at a kit just about to be marketed by Leven Technology www.leventechnology.co.uk/. It contains a thermostat and otter switch that open/operate at lower temparatures. Also included is a fluid added to the coolant that improves heat transfer. Unfortunately I found out about this kit too late. Next time...
This maybe useful, the LandRover part number for the original otter switch is PRC3541 (91/96C), cost £18.86. I replaced this as well just in case.
Have fun.
>> Edited by marlboro on Saturday 16th February 22:11
It ended up being the thermostat stuck shut. The one replaced was also fitted incorrectly with the bleed valve at the bottom rather than upper most.
Anyone replacing the thermostat or otter switch should look at a kit just about to be marketed by Leven Technology www.leventechnology.co.uk/. It contains a thermostat and otter switch that open/operate at lower temparatures. Also included is a fluid added to the coolant that improves heat transfer. Unfortunately I found out about this kit too late. Next time...
This maybe useful, the LandRover part number for the original otter switch is PRC3541 (91/96C), cost £18.86. I replaced this as well just in case.
Have fun.
>> Edited by marlboro on Saturday 16th February 22:11
quote:
This maybe useful, the LandRover part number for the original otter switch is PRC3541 (91/96C), cost £18.86. I replaced this as well just in case.
It is a great part for Landrovers but is the wrong one for TVRs! Especially if you want to keep them cool. As stated in the bible both the thermostats and otter switchs are lower switching than the landrover ones which means that using Landie bits can lead to all sorts of cooling problems.
Steve
www.tvrbooks.co.uk
PS At least you didn't fit the 101 degree air con version which really does cause a problem!
I see Leven are doing the same as David Batty. Going with a lower water stat, the heater for the roof off, winter driving is going to be even worse. Not to mention the concern of the engine not reaching operating temp. I quite agree with the otter matter, i ditched the standard otter setup years ago.
As JasonF mentioned above - check the water and oil levels. Mine gets through a little water (but not oil strangely) after high speed runs - nothing out of the normal I have to add...
A little top-up of the water level via the instructions in the owners manual and things are back to normal. It seems that a small drop in the water level will make a pretty big difference to the running temp.
Hope this helps
Paul
A little top-up of the water level via the instructions in the owners manual and things are back to normal. It seems that a small drop in the water level will make a pretty big difference to the running temp.
Hope this helps
Paul
I dont know if you will see this. I have a two stage cooling system. When the under bonnet temp gets up, the fans run at half speed, if needed they cut in full speed at an adjustable temp, around 90. Certainly an adjustable can be strapped on for not much more than a new otter. Of course you could get a Kenlowe for £39 ish. You must of seen my rantings before.
quote:
I'm concerned and confused, the LandRover part number for the otter switch was given to me by a TVR dealer. The one removed also had the same part number / temp ratings stamped on the item???
It will work but it is not the one that most people use as it switches on too high. When it switches on the fans can struggle to get the car down to temp and this means that the safety margin is small or not there.
As for running low temp stats, again this is there to improve the saefty margin so that the rad can stand some chance of cooling the car down. This starts getting worse with the bigger capacity engines. I run a lower temp stat with leakage holes and a mid 80 degree otter switch in the Griff 500 and I stay warm in the winter and the car is remarkably cool in the summer.
Steve
www.tvrbook.co.uk
I've got a lower temp (85 deg C) otter switch on my 4.0HC Chimaera, however the temp gauge lies (the fans come on when the temp reaches 70). I'm pretty sure it's the temp gauge which is wrong, I can't believe the water temperature is only 50 when on the move. This suggests that the gauge reading is about 15-20 degrees too low.
So is it likely I've got the wrong sender unit fitted or is the instrumentation the more likely suspect?
So is it likely I've got the wrong sender unit fitted or is the instrumentation the more likely suspect?
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