Author Topic: Temp gauge reads high with cold engine and hard cold start (Read 4019 times)

Dieseleo · « **on:** November 12, 2007, 05:29:03 pm »

My temp gauge maxes out and blinks even when the engine is still cold, and the car won't start when it gets below forty degrees outside. I don't know if these things are related or not. It's an 86 Golf. The gauge seemed to work fine when it was warm outside, and after the car runs for a while it corrects itself and reads at the normal operating temp. The glow plugs are good, I think the fuel lines and injectors are fine. There's a little white smoke when trying to start but not a cloud or anything that bad. I don't get much heat out of the blowers either. My Bentley says something about a sending unit that could be screwed up, but then doesn't say anything about what it is or how to replace it. Winter's coming, and I just got a job, so I need this little #&*@! to start dependably. Any suggestions?

jtanguay · « **Reply #1 on:** November 12, 2007, 08:12:25 pm »

how's the coolant level? maybe you have a hg leak?

Dieseleo · « **Reply #2 on:** November 13, 2007, 08:11:10 am »

coolant level's fine, that's not it.

saurkraut · « **Reply #3 on:** November 13, 2007, 09:26:30 am »

Might be the temperature sensor. When they go bad, they read hot. I just had to change one on my '79.

The sensor is probably located in the spigot on the driver side of the head that the heater hose goes to.

burn_your_money · « **Reply #4 on:** November 13, 2007, 12:08:53 pm »

Probably a fault temp sensor or a bad wire.

jtanguay · « **Reply #5 on:** November 13, 2007, 03:41:19 pm »

as for your heat problem you may need a new thermostat.