i fitted new rad couple weeks back, bled coolant (took rad cap of, heater on full and just let car idle until warmed up and no more air bubble were coming out and topping up as necessary), ran car for a week and been perfect (fan doesnt kick in but thats another issue im slowly trying to diagnose)

anyway ive just fitted new mugen fan switch and brand new lower temp jackson racing thermostat (both original items were fine, just improving cooling)

basically appears thermostat isnt opening as bottom of rad and lower pipe just stays cold after letting it idle for long time while trying to bleed coolant

now is this indication that thermostat is faulty or could it be something else ?

should i take stat out and drop in boiling water to see if it opens and will i clearly be able to see it opening to find if it is faulty or not ?

 

help

 

Suspending it in a pot of boiling water is the way the Helms has you test the thermostat anyhow - so yeah, do that.

 

so it should pop open in boiling water ? if its fine what else could be at fault and is there specific way of fitting the jackcon stat, oem has bypass pin at top but the jr has nothing

 

ive just tested original stat that i took out (cooling system was perfectly fine when in) and it doesnt move at all when i tested it

what are the chances of old that was working fine and brand new both to suddenly be faulty, im gonna take the new jr that if fitted out tommorow to test but if that doesnt move i aint buying jr again (i can get hold of another new 1 to test though)

 

Did you install the thermostat the right way when you frist installed it cause if you installed it backward it might of damaged it . it happen to a friend of mine but he was also a moron of sorts so he might of f***** it up beofre he put it in but it just a thought.