Sorry for the delay in posting. I believe I found the culprit (what's left of my razor scrapper nut) in cylinder 6 (see attached photo). Top of piston looks pitted but not destroyed (see attached photo). Cylinder walls and valves look unscathed as well. I am hoping I do not have to replace...
Will absolutely let everyone know. Going to finish up some other things first like Dakota Digital instrument cluster and Painless wiring harness (items started before changing out the intake manifold). If anyone is close to Melbourne Florida and wants to help diagnose - would welcome a visit.
Ok guys. I realized I am missing a small nut (maybe 3/16”x1/4”) from my gasket scraper and now, just now after starting the engine a dozen times, I am picking up what sounds like a small bb sound. It’s not synchronous, but random. Take a listen…
Backfire happened right after starting engine and giving it a bit of gas. My wife stared the engine and I watched the flex plate rotate with engine running and it looked like a a nice smooth disc rotating. Sounds smooth starting. If cracked wouldn’t it be a bit wobbly? Also check cylinder...
Already drained oil and changed filter. Oil looked good, no glitter. Will check flex plate and starter, but when cranking with coil wire pulled to check lifter operation, engine sounded smooth while cranking. Take a listen…
Just replaced Intake Manifold. Started engine and timing was off and engine backfired twice, once extremely loud. Set timing and engine idles fine, but there is a loud knock. Any ideas on the source of the knock? Any help is appreciated.