If you seen my other thread , you know i picked up a cmc 356. With it looks like a stock vw motor.. ID# AE073828 .. will check that later. question is.. i ran a compression test.. #1 - 130lb / #2 - 170 lb / #3 - 145lb / #4 - 130 lb.
I'm thinking a stuck valve on #2 ? .. been sitting for many years
do you think i need to rebuild it?
thanks folks
will get pics late tomorrow, can't figure out how to get them off my phone.
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You can pull up the site on your phone and send them that way. Or just email them to yourself and save them to your computer.
If you take valve covers off and rotate crank, you'll see if valves are opening and closing. A little Marvel Mystery Oil (okay a 1/4 jug) in each cylinder (thru spark plug hole) might free stuck parts up. Some claim AT fluid and Kerosene does the same thing.
Could be a single rocker arm off/loose, broken spring, dropped valve seat, or collapsed spring. Some say just sitting valves collapse. Expect hidden rust on cylinders/rings. Unless you want to keep car and put money into it - I'd install and fire it up and see what you have. Taking heads off would give clear idea of what you have as you can measure valves and cylinder bore.
Windoz 10 now links with my Iphone and makes it easy to access photo on phone.
I would put some penetrating oil on the valve stems, tap the ends lightly with a hammer a few times and let it sit for a while (maybe repeat the process a couple times). After a day or 2 turn the engine over and see if the offending valves move.
Skip the penetrating oil - the only good stuff is "PB Blaster" but go, instead, for a 50-50 mix of automatic transmission fluid and acetone, then liberaly spray the valve stems. Go away for a day or so and then see if the stems have freed up. If not, re-spray and wait another day and repeat until they free up. This stuff works well sprayed into the cylinders, too, to loosen up rusted rings, but Marvel Mystery Oil works well there, too, and seems less caustic to the cylinder walls.
ATF and Lacquer thinner works good too!
I don't see how that valve's gonna stick unless the cam or cam follower is broke/detached. Gotta take the valve covers off and turn it over and look.
Thanks folks. just getting in. Will pull covers tomarrow and spin , and see if all is moving. Rather not pull heads off. if i get to that, I will drop it off somewhere. found a guy to rebuild it for $400 plus parts.. but got a feeling this will run w/ new dual carb set up..lol
