251 Timing and Freeing Stuck Valves

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Posted by Dave Horvath [162.158.79.248] on Friday, April 07, 2017 at 20:01:16 :

Been helping Keith Wolfe get the 251 that we installed in his 1940 VF started. It ran when pulled, but sat outside covered with no carb on it for a few years. Installed professionally rebuilt carb. No compression in #3 and #4. Figure the valves are stuck open from sitting. Soaked with Marvel Mystery Oil. Fired on a few cylinders, but no happiness. Backfiring through carb suggested intake valve stuck open. Removed valve covers and confirmed large gap between lifter and valves in low position on #3 and #4 intakes. Used allen wrench in plug holes to tap on valves. Freed up #4 intake, but still no compression. Soaked with PB Blaster and will try again when snow melts, which should be Sunday in the 70s.

Was surprised to find the rotor pointing to 5:00 when at TDC. I thought it should be at 7:00.

Follow Ups:

Re: 251 Timing and Freeing Stuck Valves - Ray 15:55:22 04/09/2017

Play whack a mole :°) - Gary in CO 11:45:09 04/09/2017

Re: 251 Timing and Freeing Stuck Valves - Ray 20:50:00 04/07/2017

Re: 251 Timing and Freeing Stuck Valves - Ray 10:48:47 04/09/2017

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