Thread: temp rises when going uphill

Aim it at the thermostat housing.... That's the ideal location.

I'm sure someone will correct me if I'm wrong but IIRC late 90s/low 100s is what it should be.

HTH

M

sounds about right as a lot thermostats are only fully open at 92deg. thanks for the input.

Originally Posted by camel_landy

Personally, I'd want a second opinion on the temperature reading first. Do you have access to a laser thermometer? If so, see if you can get some readings when the temp is getting high to confirm that there may be a problem... You might find that the problem might actually be electrical.

M

a good tip here, i borrowed a laser thermometer to prove i had a constant temp at the thermostat, onto top of the radiator and on the block

after a couple of months when i used the headlights and windscreen wipers the temps would either go up or down

i tried running new earths with no luck so in with a new mechanical temp which has worked a treat

I've been down this path with exactly the same problem just recently and I have cleaned up the earthing points and it appears to have improved things. My temp would climb but as soon as I switched off the aircon or lights it would start to sink back down.


My Mechanic checked out the colling system and gave it a clean, also replaced the coupling which was tired.

We are having a cool snap at the moment and I have been only doing short trips round town so have not been able to replicate conditions to see if it gets hot but I will be paying very close attention to temperature; coolant levels etc over the holidays with some country drives.

Correct me if I'm wrong, but the "laser themometer" mentioned above is probably a infrared non-contact thermometer. Many of them have a laser pointer built in to assist in aiming them. Very handy tools. Can get them at Jaycar for around $70.

Originally Posted by CowsGoMoo

Correct me if I'm wrong, but the "laser themometer" mentioned above is probably a infrared non-contact thermometer. Many of them have a laser pointer built in to assist in aiming them. Very handy tools. Can get them at Jaycar for around $70.

yep thats them, must get around to buying one

Im sure the laser thermometer would be a handy tool but there is nothing better than dropping the coolant and changing the thermostat and having a look to see what is in the radiator and tanks to tell you what is actually going on in there.

If the Radiator hasnt been cleaned in the last 12 months and the coolant hasnt been changed in the same then it is worth changing them anyway and the thermostat should be changed anytime the cooling system is touched (e.g. with coolant change and flush or if you change the water pump or anything like that) so that everything is how it is meant to be and in the best condition possible.

As far as under load the flow should increase in the cooling system, thats not really correct as the coolant flow is only relavant to engine revs and weather the thermostat is open or not, engine load cant have any bearing what so ever.

Mine had a bit of a rise last week coming back from Albury on the Hume just out of town on that long hill with a head wind, 4 adults and 2 spares and the tent on the roof rack and the aircon on full blast and it went up to about half way between the hot mark and where it normally sits but as I know that everything is pretty much clean and new in the cooling system I can put it down to Load and Mud build up in the radiator which I will fix (by giving it a good clean out) when I go back to work.

Good luck with it, it isnt a huge stress unless it is doing it all the time but once in a blue moon when there are other factors involved you wont need to worry that much.