L'il help with timing chain keyway identification?
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Supreme Member
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
L'il help with timing chain keyway identification?
Just swapped a cam and found the motor had a GM timing chain p/n 3735412 in it which has 3 keyways. Unfortunately, they are marked in symbos, not numbers. Which keyway is Advanced, Straight Up and Retarded? Symbols:
o (and the keyway that is used for this is rounded on the top)
triangle (keyway is pointed on top)
rectangle (keyway is square on top)
It just looks like your run-of-the-mill double roller chain. Even worth keeping? It showed ZERO signs of stretch in the 10,000 miles it was in the motor.
o (and the keyway that is used for this is rounded on the top)
triangle (keyway is pointed on top)
rectangle (keyway is square on top)
It just looks like your run-of-the-mill double roller chain. Even worth keeping? It showed ZERO signs of stretch in the 10,000 miles it was in the motor.
Thread Starter
Supreme Member
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
RB, thanks. My first thought was that "o" was straight up but my local shop said the keyway with the squared off top (the rectangular mark) was "straight up." I did a long "hmmmmmm......." in doubt of that answer.
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