The 75 and ZT Owners Club Forums - View Single Post - Loud whistling noise from the rear of the engine

Don_neo · 19th May 2022, 13:40

Yesterday I took of the inlet manifold to check the compression in all cylinders. I was scared of a burned valve.

But the compression I measured was between 12.5 and 13 BAR in all cylinders. So the valves should be fine.

During the last weeks I noticed that the whistling noise appears a little bit earlier each time.

Might this noise come from the exhaust system, especially exhaust manifold?

Did anybody have a similar experience?

Greatings
Martin

19th May 2022, 13:40	#2
Don_neo Newbie MZ ZT Join Date: Apr 2022 Location: Duisburg Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Compression checked Yesterday I took of the inlet manifold to check the compression in all cylinders. I was scared of a burned valve. But the compression I measured was between 12.5 and 13 BAR in all cylinders. So the valves should be fine. During the last weeks I noticed that the whistling noise appears a little bit earlier each time. Might this noise come from the exhaust system, especially exhaust manifold? Did anybody have a similar experience? Greatings Martin