Pete_A4

i just bought a coolant temp sensor its square, black and goes to a 4 pin connector. I have a 96 a4 2.8 and have no idea where it is located please anyone help me
thank you

Pete_A4

ok so i found it installed it and the temp hits quarter heat but doesnt go to the middle??? Please im so lost and frustrated idk what else to do. i put in the new sensor o-ring and only thing is the connector is on but wasnt able to connect the d-clip back on
any help would be highly appreciated
thanks

Gjaime

Start from the beginning. Is your coolant level correct and bled properly?

How long since waterpump, thermostat has been changed. I would try to fill and bleed coolant first.

I would of done that before changing the ect out. But it's done.

-Jaime

turbo510

First, don't run your car without the retainer clip that holds in your temp sender; the sender will pop out, along with coolant, when the system gets hot.

Second, be sure that you have purged the air from the cooling system. The left-side heater hose has to be pulled almost off the firewall pipe, to expose a small hole. This will leak out air, then coolant, as the air is purged out. You will need the plastic coolant tank lifted up as high as the hoses allow, and the cap off, plus the engine should be running. It helps to unplug the coolant level sender at the bottom of the coolant tank when lifting the tank up.

If your gauge still only reaches about 1/4 range, this could be a stuck open thermostat. I had to replace my 2.8's because it never closed. It's a fairly cheap part, but kind of difficult to get at.

dm.A4.B5

What turbo510 said in the first sentance about the temp sender popping out, the same thing happened to me.

I drove almost a mile with no coolant, I think, but still alive 32k miles later. Only later did I realize I had a broken clip on the garage floor when I crawled back into the garage.