The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need Help, knocking-pinging

**Getter-Done** · 10-07-2018, 10:13 PM

Is the mechanical advance working?
A way to check is to take the distributor cap off.
Then turn the rotor button with you hand it should move about a 1/4 inch or so. If it does not move at all the shaft is seized up.
While you got the cap off check the springs on the flyweights under the rotor button.

10-07-2018, 10:13 PM	#9
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,719	Re: Need Help, knocking-pinging Is the mechanical advance working? A way to check is to take the distributor cap off. Then turn the rotor button with you hand it should move about a 1/4 inch or so. If it does not move at all the shaft is seized up. While you got the cap off check the springs on the flyweights under the rotor button. __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build