Does rod knock get louder with higher revs?
- Thread starter Skiver
- Start date
Hi folks - happy holidays to all!
It’s been a while - kids and fixing up a 993 and finally got round to stripping the engine to figure out what was causing that knocking noise.
Turns out it’s the piston pin / wrist pin bushing on cylinder 3 that has worn down and increasing the gap. While i was in there it looks like the connecting rod cap was bolted on the wrong way too. Cylinder 5 also had a loose piston pin but not as bad as #3.
I’ve cleaned all the crowns and just waiting for w&n order to arrive to reassemble.
Question for everyone - did you also find you had piston washing on your crowns? Mine seem to have and wondered if normal for this engine? The rings looked decent and gasket was intact.
It’s been a while - kids and fixing up a 993 and finally got round to stripping the engine to figure out what was causing that knocking noise.
Turns out it’s the piston pin / wrist pin bushing on cylinder 3 that has worn down and increasing the gap. While i was in there it looks like the connecting rod cap was bolted on the wrong way too. Cylinder 5 also had a loose piston pin but not as bad as #3.
I’ve cleaned all the crowns and just waiting for w&n order to arrive to reassemble.
Question for everyone - did you also find you had piston washing on your crowns? Mine seem to have and wondered if normal for this engine? The rings looked decent and gasket was intact.
