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ayglass ayglass is offline
Registered User
Join Date: Aug 2006
Location: Cleveland, Georgia
Posts: 149
Question Slack chain sounds?

Having just put in new cams, timed them, and cleaned everything up I am now worrying about every little sound. Here's one I would like to ask the group about.

With the engine cool it sounds perfect. When it's hot after a good drive I find that reving in neutral gives me a little growl like a slack chain sound as the revs are dropping back down. I don't notice this on the road. I put in the updated restrictors in the heads while it was out.

I put in Rotella-T 30 weight for the 1st 20 minute break-in and dumped the oil/changed the filter. I now have almost 100 miles on the new cams and plan to put in the Rotella-T 15w40 within another 100 miles. If I can find a 20w50 with ZDDP in it I'll go back with 20W50. Maybe the tensioners like thicker oil?

The tensioners seem healthy otherwise so I am wondering if anyone has experienced this sound. Feel free to tell me I'm being paranoid.
Andy Glass
'86 930 Kokeln IC, K27-7200, SC cams, GHL headers, Fabspeed muffler, Short R&P , misc other mistakes made...
Old 10-11-2007, 02:08 PM
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