I don't remember the GM make. It could have been a Chevy station wagon or a Pontiac back in circa 1982. The car was probably a about a 1975-77. A grad student did not know which cylinder was misfiring or which bank so I selectively removed each plug wire and replaced it. I told him which bank (left) and which cylinder.
The stamped rocker had slipped off the valve tip and had rounded it at a slant so it would not stay on. It could also have been a bent push rod or loose stud or even stuck valve. He had to pull the head and replace the valve. I did not follow up as to the cause. Up to that time I had never seen an engine that had no rocker arm shaft.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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