Right I know I asked this before and Steve E told me that the fan only comes on at 105ºC and comes on full power at 110ºC so I presume when the temp is below that it is normal.

 

 

I had a cambelt change and before then I it was running cool very rarely going over 80ºC and when it did it went no higher than 90º.

 

Now after my cambelt change which the water pump was changed too, its getting to 100ºC too often. Today I was driving 50mph down the motorway at 2000rpm in 5th gear and the temp was about 95ºC.

 

I accelerated to 70mph which was about 2500rpm for about 10 miles and the temp went up to 110ºC, when I started to get a little worried.

 

Any help?

 

Stuart

Im getting one from AndyZ. Hes wisking it here next day delivery :eek: which you can imagine is costing a few quid, but still way cheaper than Nissan's fan motor.

 

 

My car never used to over heat. The pipes are hot to touch, water is not pissing out and the stock gauge has hardly moved. Probably goes from below the half way line to just above it, while my other one skyrockets.

 

The thermostat is working apparently as the bottom pipe is as hot as the top. If its not working the bottom pipe is cooler apparently.

 

Stuart

Oh yeah, Phil said that because the wire for the temp sensor goes across my engine, the heat could be effecting it.

 

I know it can happen but could it really make the after market one go that far out?

Even though the stock gauge can be highly inaccurate, it would still show a high temp the same as your aftermarket one, hence there has to be another reason the aftermarket one is going nuts !

Did you check yer electric fan and wires by crossing them to see if it will actaully work ? again it won'y work on it's own, if the stock sensors are reading correctly, showing that it is a fault with the aftermarket set up as suspected.

smithy :cool:

Yeah the fan wires work.

 

I have acutally got it moving but it needs a little nudge and then id doesnt spin fast enough.

 

It spins on 2 settings too. There is a really low speed when the engine reaches about 90ºC and if you take the ECU temp sensor off when it should go really fast, its spins enough to make a small breeze

 

 

Stuart

i know i'm talking about the S13 here but I imagine the stock gauges are the same.

 

i ahve jsut fitted an Autometer gauge for water and while the stock gauge reads smack in the middle the autometer will ead anywhere between 170degF and 210degF without the stock gauge even flinching. AFAIC that is pretty piss poor.

I would pull the sender for the after market gauge keep it wired - make an earth connection to the body and stick it in a pot of boiling water to verify it. I doubt its reading right as others already suggested .

 

The leccy fan is a red herring - its got sweet fa to do with cooling the rad once the car gets above about 30mph and through draft takes over. The main viscous fan would also have locked up its bi metallic clutch if your water temp got that hot. It would then have been working overtime and you'd hear it quite loud when you rev it.

i would check the timing doesnt take much to cause overheating i speak from experience

Originally posted by fairlight

i would check the timing doesnt take much to cause overheating i speak from experience

 

 

My dad said that.

Stu with ref to the thermostat, i did some very sad tests with my new v's old one in a saucpan of boining water to check the new one worked before i put it in.

 

I found the old one never quite closed tight, thus making the car get to operating temp more slowly. The new one seemed to open a moment later but when it did it opened much further than the old one, thus sureley allowing more water through faster, thus better cooling.

 

My stock guage still reads abut the same level but have noticed it gets up to temp alot quicker these days.

 

Sureley if you had cambelt etc you got a new stat at the time though:confused:

 

Probably no help, but i try!!

Errr thanks B19rks, I think ;)

 

 

Apparently the thermostat is working fine. I dont know whats wrong. I am now thinking that the sensor is playing up as at 110ºC which it says it gets to, steam should be shooting from the rad cap.

 

Stuart

silly question time, but have you bridged/spliced your aftermarket gauge sender wire with the stock temp sensor like I did, or are you using one of smithys boss jobbies???

 

vicky x x

Originally posted by SRRAE

Errr thanks B19rks, I think ;)

 

 

Apparently the thermostat is working fine. I dont know whats wrong. I am now thinking that the sensor is playing up as at 110ºC which it says it gets to, steam should be shooting from the rad cap.

 

Stuart

 

not quite true actually.

 

boiling point of water is much higher in a pressurised system.

 

our mercs go up to 120 before going in the red. in this hot weather, running at 100+ is not uncommon

Have you had a feel at the top and bottom water connection pipes after a run. You should feel the temperature difference. Also Try to feel the matrix surface of the rad - is it hot or cold? Hopefully you dont have a furred up radiator core.