cam to opti dowel pin
Thread Starter
Staging Lane
Joined: Sep 2005
Posts: 56
Likes: 0
From: plymouth,MN
cam to opti dowel pin i heard that sometimes you have to shave the dowel pin in aftermarket cams i put in a comp cams cam and the car is running like **** ignition related issue and i put in a new opti and still not right
Thread Starter
Staging Lane
Joined: Sep 2005
Posts: 56
Likes: 0
From: plymouth,MN
thats what i think is happening it is a 94 were would i find info on that i have a hard time finding anyhting on the lt1s that i dont allready know there arent many good sites that i have found i always get better info from people on here that know what there talking about and have been inside the motor
When we put the cam in on my 95, we had to shorten the pin a little bit, but not much. Ask a GM Dealership, the might have that spec. The guy that helped me build mine used to work for GM, so we had all the info needed.
TECH Enthusiast
Joined: Nov 2004
Posts: 660
Likes: 0
what cam is it and did you get a tune done with the cam swap??
the 94 nonvented setup has a dowel pin length of .300"-.320"
the 95+ vented setup has a dowel pin length of .620" to .650"
it could be a few things. when you replaced the opti did the opti drive gear come out with it and you had to reinstall it?? i know it's splined and keyed, but it can go in incorrectly. i know because i've done it. if the dowel pin was too long, it could damage the opti, or make it difficult/impossible to install correctly.
have u ever set the lash before doing it for this swap?? are you certain you did it correctly?? are you certain the spark plug wires are in the correct places on the opti?
the 94 nonvented setup has a dowel pin length of .300"-.320"
the 95+ vented setup has a dowel pin length of .620" to .650"
it could be a few things. when you replaced the opti did the opti drive gear come out with it and you had to reinstall it?? i know it's splined and keyed, but it can go in incorrectly. i know because i've done it. if the dowel pin was too long, it could damage the opti, or make it difficult/impossible to install correctly.
have u ever set the lash before doing it for this swap?? are you certain you did it correctly?? are you certain the spark plug wires are in the correct places on the opti?
