Running Cold

Author
Discussion

Viper Stuart

Original Poster:

66 posts

208 months

Wednesday 1st June 2016
quotequote all
Looking for opinions. Was out tonight and noticed car seemed to running colder than normal by about 15 degrees ( euro spec 98gts and usually sits with needle vertical at 90 degres). Got home and let it idle for 10 mins and gauge went to 90 but no higher. However fan had kicked in by 90 and normally it wouldn't come on til about 100 . So
1. Is there a sensor that links to the gauge that could be faulty
2. Is the fan controlled by a different sensor which would appear to be working correctly
3. Is it a thermostat problem
Any help appreciated
Stuart

Viper Stuart

Original Poster:

66 posts

208 months

Thursday 2nd June 2016
quotequote all
thanks guys. Was kinda hoping it was just the coolant sensor. However I started the car from cold tonight and the top hose pipe heats up quickly in sink with the engine and not after the engine gets hot so looks like thermostat open. Having read Marks write up last week on changing his I know what's ahead of me. Don't know whether to be confident or worried!

Viper Stuart

Original Poster:

66 posts

208 months

Wednesday 8th June 2016
quotequote all
my fan is kicking in at 12 o'clock when it used to be 1 o'clock. If the thermostat is now stuck slightly open making it run cooler then I don't see why that should affect the fan cut in temp. I believe the sensor sends signal to both the gauge and the ECU ,so have ordered a new sensor and will see what difference it makes ,if any,before changing stat.

Viper Stuart

Original Poster:

66 posts

208 months

Wednesday 8th June 2016
quotequote all
thanks for the heads up on the coolant! I was mulling over whether to drain it or not but decision made. Cheers

Viper Stuart

Original Poster:

66 posts

208 months

Monday 13th June 2016
quotequote all
New sensor fitted and all is back to normal. Thanks to those that offered gaskets and to Billy Whizz and VPRMAN Colin who genuinely offered their time had the stat needed changing!