Briann Posted December 4, 2022 Share Posted December 4, 2022 (edited) Drove the car around town this summer ran not bad for sitting for years was not able to get the idle down rebuilt carb mixture screw did not c do much and was worse when hot plus plugs were on the hot side this week I took the head off when i took the intake off the middle horn broke off so was sucking air all this time so thats why was running rich and the exhaust had a couple of cracks and as i thought the heat riser was jammed on heating up the intake and not letting out the exhaust out much on 3 cylinders. that made for harder starting when hot the valves are lap in now should be up and running again soon the spare engine i had will come in handy for the manifolds Edited December 4, 2022 by Briann (see edit history) 1 Link to comment Share on other sites More sharing options...
61polara Posted December 7, 2022 Share Posted December 7, 2022 A crack in the intake manifold pulling in air will cause an engine to run lean not rich. 1 Link to comment Share on other sites More sharing options...
Briann Posted December 8, 2022 Author Share Posted December 8, 2022 I got my word mixed up it started well and idal was a little hi but after a dive it went up a bit the crack i guess opened up plus the gaskets were very old they were most likely never taken off the engine I check for air leaks never found any and vacuum was around 20 it will be fine now with the new intake and exhaust the compression was low on 2 cylinders there was not much gap on the 2 valves in these cylinders and these valves needed to be dressed a bit on my B&D valve grinder the rest lapped in by hand quick 3 Link to comment Share on other sites More sharing options...
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