212 intake manifold

Unknown
Unknown
edited November -1 in HUDSON
I've read through my shop manual and can't find the info. I was working on my car the other day and a bolt which was apparently held into a larger hole by J.B. Weld or something similar fell out. It is toward the bottom of the intake, in the center section under the carb on the firewall side. When running exhaust comes out of this hole. Directly opposite there is apparently the same hole with a large fine thread bolt screwed in it. It appears to be a modern bolt, not vintage 1947. What are these 2 holes for? I'm guessing something to do with a heat riser or something? Also was the Marvel Mystery Oil injector standard, a factory or aftermarket accessory? It is painted body color on my 47 Commodore. Thanks.

Comments

  • Unknown
    Unknown
    The MMO injector was after market. The holes in the manifold are bolt holes to fasten the manifold to the block and this passage is for the carb heat. Scroll down a few threads and there is a picture of 2 manifolds. The 2 holes in the center are for the heat.
  • Unknown
    Unknown
    Those are the holes I'm wodering about, the ones for the heat. Were they just holes that were there for casting purposes? and therefore originally just blocked off as mine are, or did somebody remove something from there?
  • Unknown
    Unknown
    The heat valve is in the exhaust manifold. Probley stuck open. It turns some of the hot exhaust down to the intake manifold. Goes in one of the center holes and back out the other one back to the exhaust. The bolt hole may be stripped out or twisted off. Probley havt to take the intake off and maybe the exhaust manifold to fix it.
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