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Discussion Starter #1
I replaced the fuel pump on my 68 cougar 302
Start and run a few seconds when cold then shut it off.
I then hear a knocking noise for a few seconds,never heard before.
Plus I had the radiator off and refilled it.
Sounds like tapping your knuckles on the desk.
Any ideas? Thanks
 

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Sounds like an air pocket in the block that needs to come out. The easiest way to avoid them is to drill a small hole in the thermostat or get a quality one that has a "dingle" valve on it.
 

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I know this isn't your issue, but after WWII my father was a Buick dealer, he had at one time 116 new engines in crates lined up around the walls waiting to be installed in cars. Don't ask me why I remember the 116 number, kids just do funny things. New cars weren't available yet, so new engines, and tranny's were installed.. Anyway they installed all of them, but one had a TICKING noise, and they finally figured it out, they had stuck the customers OLD oil DIP stick in the new crate engine, and it was bent a tad on the end and the crank was clipping it.

Lots of strange stuff happens when working on cars, FOR SURE....

Dale in Indy
 

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MAybe a bit of a late thought, but are you sure you got the arm for that fuel pump UNDER the eccentric and not over it? Depending on what postion it was it when you installed it it may be beating the bajesus out of the FP arm?
 

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Its not deiseling? if so Idle is to high.
 
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