Running Hot

[johnnyp 1]

hi i have just rebult a 1.9 gti engine for my cti car runs fine but it runs hot at idle the fan is on al the time and just keeps it from over heating when driveing it stays about 1/2 way on the gauge

 

i have cheaked the thrmstat blead the system the heaters run hot done a compresion test all fine no water or oil mix either.

 

the rad has no cold spots not sure what to do next?

 

Johnny

[welshpug 1,657]

sounds about normal TBH, the gauges aren't the most accurate, and the fans end to kick in when the needles reach the last mark or two.

 

does it actually overheat and whats the oil temperature like?

[johnnyp 1]

hi oil temp is just over a 1/4

 

the fan dosnt bring the temp down at all its got all the way up to the last mark the last engine neather went past 3/4 and the fan brought the temp down

 

Johnny

[daza4 24]

Sounds like an airlock still somewhere try bleeding again.

You might find the thermosat might be iffy aswell? could cause the same, but if everything is ok it shouldnt overheat.

 

You haven't removed the fan at anytime? it is pulling air through the rad and not pushing back ie wired incorrectly?

 

What idle does it run at? might be too high revs causing the extra heat.

 

anything else you have done to the car ?

[johnnyp 1]

hi its idleing about 1000rpm fan is pulling the air through i have not changed that i did cheak the thermosat in hot water that opened and closed fine and i have bled the system 3 times so i dont think its an air lock iam going to change the rad and try that i have a spare one

 

Thankyou Johnny

[guffe 2]

Have you bled the system from thermostat housing and heater pipe? I had problems with heat when I bled only from heater or thermostat, you must bleed both.