'94 960 engine knocks when hot...more details inside >>

fharen · Post by **fharen** » 27 Sep 2009, 15:30

I have a 94 960 with 226,000 miles.

The engine knocks really bad.

What it does:
I can hear excessive knocking in the motor. It is also drinking coolant more than normal.

What I have done so far:
As a precautionary measure I filled up with high quality non ethanol fuel and put in a bottle of high mileage fuel system treatment hoping it would go away. It didn't.
I feel this is a mechanical issue since it only happens when the motor is hot. Are there electrical issues to also look into ?

What I plan to do:
Pull the spark plugs and make sure they look good (there were changed about 10k ago). Inspect in and around spark plugs and coil caps....

Head Gasket ? - no apparent condensation on tail pipe. Exhaust smells normal.

What do I need to do next ?

Post by **billofdurham** » 28 Sep 2009, 13:01

There are two knock sensors, one on each side of the engine.

Do you have a check engine light showing?

Other things to check:

960 knocking.pdf: (25.15 KiB) Downloaded 111 times

It is also drinking coolant more than normal.

Have you checked for coolant in the oil or is there any indication that the coolant is being pushed out of the overflow?

Bill.

fharen · Post by **fharen** » 28 Sep 2009, 19:40

I will look into knock sensors.

No CEL.