Getting hot

[Buggerific]

Hey guys

Recently bought a 92 gq 4.2 diesel and the temp guage sits at about a quarter till I'm going up a hill with some weight loaded in the car then it seems to climb to around half on the guage.

Is this fairly common or should I start chasing causes. Ive heard the temp guages aren't great, perhaps I should chuck an aftermarket one in?

[big red]

halfs OK
worry when it hits the top line.

[Buggerific]

But I was sort of wondering if there should really be that much movement in the guage. At "normal" operating temp it sits at a quarter or less and with weight up hills she rises to half.

If the guages aren't really accurate that might be a substantial differ in engine temps.

[mq_camo]

between hot and cold is only very minimal, only a few degrees, wouldnt hurt to fit a new guage, its cheaper than going through the cooling system if its fine.

[its aford not a nissan]

on mine 1/2 way on the guage is about 90 deg , 1/3 would be about 80

i found on mine a standard thermostat was too restrictive when under load ( like on the hwy) it wouldnt flow enough when partialy opened to maintain the around town temps , so it heated up more till the thermostat opened enough to allow more flow , now i fitted a high flow thermostat which allows more flow when partially opened , the result is a more stable temp guage


but ..... 1/2 way on the guage is nothing to worry about

[Dirty]

now i fitted a high flow thermostat which allows more flow when partially opened

Is there a modification to the standard thermostat, or where are they purchased?

- David.

[Reddo]

I find with my TBET, that on the downhill runs, it will head off to a 1/3, however, normal running temp is half a gauge. Working it on the sand for the first time last weekend, it went up another small amount past half, and i heard the fan roaring for the first time, and it went straight back to half.

But as a suggested, if you are worried about it, head off and get an aftermarket item.

This post is more of a back up than anything else

[thelux]

My 96 4.2 Diesel GQ gets hot going up long labouring hills as well I thought it a bit strange but now i'm glad to hear i'm not the only one.

Guage goes to about 3/4 maybe a little more, boiled once on a rediculously long hill but temp never even went right to hot.

If i climb a long hill i usually stop at the top and let it idle for a few mins to cool down, generally it cools down again fairly fast.

[toy77]

also curious about this high flow thermostat.....

[money_killer]

also curious about this high flow thermostat.....

i got a high flow to when u ask for a new themstat just say u want a high flow. if says it on the packet. if they tell u they is no they dont know wat they are talking about, i would fush ur radatior new themstat and coolant just for a good piece if mind,and away u go, they should normally sit on a quater but do get upto half way so i would not be bothered .

i also just fitted a aftermarket gauge send into the top of the hose just before the themostat housing but yet to take it for a run and compare that temp to the factory gauge, idleing for a while was only like 50 degrees.

aaron

[money_killer]

http://www.outerlimits4x4.com/viewtopic.php?p=1760744

[its aford not a nissan]

the highflow thermostat basicly has a bigger opening ie : instead of being say 25mm across the part that opens its about 35mm , this bigger opening simply allows more flow once the thermostat starts to open , this thermostat should help stablize your temps as long as your radiator is in good nic , if it is half blocked then it wont do jack

but i did notice this weekend towing the camper trailer with the a/c on that my temps still rose to about 1/2 way but that was sitting on 115 kph going up a big hill and 1/2 way on the guage is where i have the thermo fans set to come on full power , a couple of mm below 1/2 is where the thermo fans come on 1/2 power but they are on 1/2 power with the a/c on anyway , yet to test towing the camper trailer on the beach which will be interesting

[its aford not a nissan]

now i fitted a high flow thermostat which allows more flow when partially opened

Is there a modification to the standard thermostat, or where are they purchased?

- David.

most auto shops will be able to get them in ( if the pimply faced kid knows what he is doing )

i used to mod the standard thermostat so it ran hotter ie: 90 deg , that stopped my water temps from hitting the 3/4 mark but sinse fitting thermo fans i found the motor relying on the fans to keep cool where i wanted just the air flow from driving to keep the temps in check , originally i thought there was too much crap infront of the radiator blocking airflow but when i fitted the highflow thermostat the fans didnt need to come on any more when on the hwy unless pushing it towing

[DJJ77]

My old Patrol used to do the same thing. Up hills and on the highway with a load it would climb up to half or a bit over. On the beach doing say 90kph it would sit on a half in 5th gear but 1/3 in 4th gear doing same speed. It is common in the td42 and its just something that I used to keep an eye on but not worry to much. I have heard that the difference between a 1/4 and 3/4 on the gauge is not that much. I was worried when I turboed mine it might get worse but it didn't. I always just drove to it and was aware when loading up the engine.