Fan belt too tight?

He ran it with no belt and same sound. Good luck !

I'm curious about the turbo style tensioner? Spring type? Have a part number handy?

Thanks,

These Pelican Parts - Product Information: 930-105-053-00-M260 the last of the contained oil / spring type, some call them "turbo" because of the 930 part no.

Did you ever figure out the problem?

I did. turns out all the head studs on the right side were lose. It's a head scratcher as to why but every head bolton the right was lose a 1/4 turn.

Torqued them all back up and runs like a champ again.

Chris

73 911 E

Switching to the tensioners back to the "Turbo" type got rid of the "noise". I don't know if it was really a problem in the first place, or if the pressure fed tensioner's were bad or the different chains were just noisy. I suspect the pressure fed tensioner's apply more tension to the chains than the Turbo type. I do get a little chain noise at cold start up for about 30 seconds until the tensioner's even out, had that same issue with the pressure fed type before the rebuild.

sorry, just realized I replied to the wrong thread.