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#1
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383 Chevy Stroker Valve Train Problem
What I Have Is A Chevy Cavalier With A 383 Stroker In It Tried Starting It And I Just Purchased It And Noticed A Tapping Sound So I Took Valve Covers Off And Noticed A Couple Of Roller Rockers Blue In Color Not Sure What They Are Didnt Get Paper Work Were Loose So I Decided To Readjust Valves So I Got Number One Up On Compression Stroke And Set Timing Mark On Zero And Made A8 Marks On Harmonic Balancer In 45 Degree Increments And Each Mark Representing A Valve But Noticed As I Started To Adjust The Vavles That Some Of Push Rods Are Bent What Could Be The Reason And What Is The Easiest Way To Set Roller Rockers Thanks Dan
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#2
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Looks like you bought something that someone wanted to unload in a hurry.
Let me guess, it was a cheap "good deal" The bent pushrods will have to be replaced with new ones. To adjust the valves, you need to position the valve you want to adjust fully closed. #1 cylinder: Bump the starter over while watching the valves motion. When the #1 intake valves open, and closes and just arrives back on the valve seat (just closes) , stop and adjust the #1 exhaust valve to spec. ( o lash hyd cam) (.015" .028" lash spec solid cam). Continue to bump the starter over bit by bit while watching the #1 exhaust valve motion. When the #1 exhaust valves just starts to open (first starts to move off seat) stop and adjust the #1 intake valve to spec. Repeat, using the same method for the other 7 cylinders. The $$bent push rods$$ are a strong indication of likely over rev abuse, valvetrain interference and/or valve/piston interference. You may have other more serious engine damage than just the pushrods. I'd start with a compression test. Last edited by F-BIRD'88 : 04-08-2009 at 12:45 AM. |
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#3
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You need to find out what bent the pushrods. The usual suspects are:
Lack of sufficient piston to valve clearance. Rocker to stud interference. Valve spring coil bind. Retainer to valve guide interference. |
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#4
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Quote:
This is going to end up being hosed up on so many levels!!!!!!!LOL Wasn't a Cavalier originally a FWD transverse engine car? Now it's got a SBC stuffed in it? I'm a gett'n the shivvers just thinking about it!!! |
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#5
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Quote:
All very good advice. Can I add something - addressed to the orig poster? It would really be helpful to try making your messages easy to read. Insert paragraphs where needed, and periods after each sentence. Not trying to be a jerk here, but it's a GOOD thing your original post was short. A lot of people may not even have tried to read it. |
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