bad valve chatter

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timothyhampton

11-03-2004, 12:38 PM

I have an 89 Astro with a 4.3 and the valves are chattering really bad on acceleration. Any ideas on what to check? Also, how hard is it to replace the rear main oil seal on this motor? It's starting to leak pretty bad! Thanks

thehoopjumper

11-08-2004, 11:10 PM

Check your timing.

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