Points vs Electronic ignition and Pulley timing mark

[Phil Waterman]

Hi Mark

Have you tried shorting out one plug at a time to see if you can find the one that doesn't make the engine change beat?

Even compression across all the cylinders would normally indicate cylinders and valves are not the cause of the problem.

The only exception to a valve sticking on closed on a flat heads that I can think of is with the flat heads have hydraulic lifters. My 49 Lincoln has a big flat head that has hydraulic lifters but the truck version of the same engine has solid lifters.

Keep us posted on what you find.

Cheers Phil

[Richard Farrant]

Originally Posted by Phil Waterman

The only exception to a valve sticking on closed on a flat heads that I can think of is with the flat heads have hydraulic lifters. My 49 Lincoln has a big flat head that has hydraulic lifters but the truck version of the same engine has solid lifters.

Hi Phil,
I have been dismantling a Cadillac V8 today, probably been standing for 60years, this has hydraulic lifters and turning the cam over, it still lifts the valves open and shut with no oil pressure.

regards, Richard

[Phil Waterman]

Hi Richard

You are correct the hydraulic lifters would still have to open the valves even when completely compressed or you would never be able to start and engine that had never had oil in it or had sat for a long time.

Cheers Phil