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**WorkinLonghorn** · 01-09-2007, 01:19 AM

Don't know if this helps but when I had a motor put in recently I saw the same thing and decided it was OK. Now 12K later the TDC mark is about 20 degrees advanced,so I suspect that the thing is slipping internally. I'd get another one.make sure the seal surface is good or get a sleeve installed.

01-09-2007, 01:19 AM	#4
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,887	Re: Harmonic Balancer issues. Don't know if this helps but when I had a motor put in recently I saw the same thing and decided it was OK. Now 12K later the TDC mark is about 20 degrees advanced,so I suspect that the thing is slipping internally. I'd get another one.make sure the seal surface is good or get a sleeve installed. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.