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1989 GMC 4000 Diesel 275CID Valve Train Knock
Hi Everyone! I have this cab forward that has a loud upper knock that sounds like valve clearance is to much and the problem I am having is I don't have any shop manuals on this truck and/or engine. So I would like to know if anybody has the valve adjustment s...
FIX posted 7/28/1998
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Message Closed w/FIX
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| VIN | J8DB4B1H8K |
| Engine | 275 / 4 cyl |
| Affected | Valve Train Knock |
| Conditions | Heavy Knocking |
| Misc. | Cab Forward, Isuzu Engine |
Message Closed w/FIX
Vehicle Data
1989 GMC 4000 Diesel
| VIN | J8DB4B1H8K |
| Engine | 275 / 4 cyl |
| Affected | Valve Train Knock |
| Conditions | Heavy Knocking |
| Misc. | Cab Forward, Isuzu Engine |
Video