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change of head and running hot
https://www.slantsix.org/forum/viewtopic.php?t=13741
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Author:  saskatchewan [ Mon Jul 18, 2005 9:08 pm ]
Post subject:  change of head and running hot

I put an Offenhauser intake and the four bbl Holley 390 on my 1965 Valiant.

I also changed the cylinder head to one I pulled of a 1976 dart.

I don't have the carb or the valves adjusted that well yet but, it is running.

However, it is running a bit hot.

Do you think that this might be because I set the valves a bit "loose"? I set them at more than .022 exhaust and over .012 intake because the car was cold when I was doing this and I figured that the heat would cause it to tighten up?

Or do you think that running different spark plugs would help?

Thanks

Author:  Slant6Ram [ Tue Jul 19, 2005 8:18 am ]
Post subject:  Lean runs hot

A lean fuel mix will run hot. It's just my first guess, but check for vacuum leaks and mixture adjustment.

I won't say your other ideas are way off, but I don't really know.

Author:  70valiant [ Tue Jul 19, 2005 4:57 pm ]
Post subject: 

do yourself a favor and readjust the valves hot. cold adjustments just aren't accurate.

Author:  zedpapa [ Wed Jul 20, 2005 8:01 am ]
Post subject:  running hot

check ignition timing and your vacuum advance. the vacuum advance hose fell off my dist. one time and caused the engine to overheat(read: boiling) from retarded timing.

zedpapa

Author:  kesteb [ Wed Jul 20, 2005 9:45 pm ]
Post subject: 

I would say warped cylinder head and/or bad head gasket.
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