964 Engine noise

[panipaolo]

good evening everyone. I have a problem with my 964.

After adjusting the valves I let the engine warm up well and then I tested the car on the road (about 20 km) and everything are ok. After two days, I take the car back, I drive about 2 km on the road with the engine at no more than 3000 rpm and suddenly I start to hear this strange noise coming from the right bank. I am attaching this old video taken from Pelican Forum by youtube because the noise is heard much better than in the video made by me.
The noise is just that.

https://www.youtube.com/watch?v=GheB...ature=youtu.be


Operations performed:

I check all the spark plugs on the right bank - ok,

removed power steering belt and A/C belt.

The noise is always present and is related to the engine revolutions.

Right bank cylinder compression checked - all ok.

What can it be?

Best regards
Paolo

[panipaolo]

I found the problem, Heads gasket

[pmax]

Originally Posted by panipaolo

good evening everyone. I have a problem with my 964.

After adjusting the valves I let the engine warm up well and then I tested the car on the road (about 20 km) and everything are ok. After two days, I take the car back, I drive about 2 km on the road with the engine at no more than 3000 rpm and suddenly I start to hear this strange noise coming from the right bank. I am attaching this old video taken from Pelican Forum by youtube because the noise is heard much better than in the video made by me.
The noise is just that.

https://www.youtube.com/watch?v=GheB...ature=youtu.be


Operations performed:

I check all the spark plugs on the right bank - ok,

removed power steering belt and A/C belt.

The noise is always present and is related to the engine revolutions.

Right bank cylinder compression checked - all ok.

What can it be?

Best regards
Paolo

What's ... ?

Video unavailable.

[mikedsilva]

Originally Posted by pmax

What's ... ?

Video unavailable.

yeah, all a bit weird..