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04-30-2003, 01:00 PM
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Registered User
Join Date: Nov 2001
Location: Harvest, AL 35749
Posts: 337
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Valve Clatter - Timing ?
I hear some valve clatter when it hit 2nd and third gear on a slight incline on my 305 K5 Blazer. I've bumped the timing from 4 to 8 to 12 without major improvement although 12 does sound better than 8 degrees. Yesterday I filled up with 89 octane to give it a try. Again some improvement. This is a newly rebuilt motor with about 2500 miles on it.
Ideas.
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1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749 |
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