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Engine Specific Info and Questions => IDI Engine => Topic started by: kingler5 on December 08, 2010, 03:09:53 am

Title: Engine runs too cold?
Post by: kingler5 on December 08, 2010, 03:09:53 am

Okay so if I am sitting in traffic, my coolant temp will go way up to beyond 3/4 hot, but the other night rambling down the highway, it was abit of a chilly night ( maybe mid 50s ) I tried using the heat at about 90 kph and the temp gauge went from about 2/4 down to less that 1/4 and the heat I was getting was unnacceptably weak, even on full blast with the temp on full hot it still felt pretty cool.

The A/C definitely was not on, and it seemed that when I turned off the heat the temp would come up a little more. I suppose I should be checking for proper operation of the control valve on the heater hoses.

Any other suggestions?

Title: Re: Engine runs too cold?
Post by: BigVWman on December 08, 2010, 04:38:16 am

Failing thermostat maybe?

Title: Re: Engine runs too cold?
Post by: theman53 on December 08, 2010, 05:05:05 am

I had one that would do that. That one was the coolant level was low.

Title: Re: Engine runs too cold?
Post by: Quantum TD on December 08, 2010, 08:20:11 pm

Quote from: BigVWman on December 08, 2010, 04:38:16 am

Failing thermostat maybe?

X2 Sounds like it's stuck open.

Title: Re: Engine runs too cold?
Post by: vanbcguy on December 09, 2010, 05:49:28 pm

Yup have exactly that on another car here right now that's in need of a new thermostat... Thermostat all the way!