I just installed a new cam in a 327. I thought I followed the directions exactly. It cranks, slower and louder than before. No backfire. I have fuel to carb. I have spark to distributor. (HEI) I have spark to the plugs confirmed with timing light. I rotated the distributor a bit while someone cranked the engine but no change. I have apparently got it way out of time.(?) How do I get it back without tearing the front back off the engine? Any help is appreciated!
05-28-2002 07:09 PM
Maybe try rotating distributor 180 degrees directly across from number one,did you time cam and crank gears dot to dot? If you dont want to move dist.to see if thats your problem you can move your plug wires starting number one at number six firing order.just a couple of Ideals hope this helps(wrenchturner) :)
05-28-2002 07:45 PM
If the cam is so far out of time that it wont start its probably better you pull the timing cover back off. You dont want to bang a valve on a piston that'll mean lots of $$$. Anyway if the cam is advanced or retarded to much that'll drastically move the RPM range of it either up or down.
05-28-2002 10:42 PM
You definetely don't want to ding a valve on a piston cause then you have to tear into the motor. Just take the time to take the cover off and inspect the installation. After that, you can check the distributor. But make sure the cam is right. If thats not the case than you are many degrees off timing. I replaced the distributor and didn't have it right (60 degrees retarded) and I thought I just didn't have any fuel until I looked at the timing light and wasn't even able to see my paint mark on the balancer. If its not the cam, turn the distributor a few notches one way or the other until it starts and you can see how close you are with then timing light. Its good to have someone to help crank and give the motor gas so that you can see the timing without actually starting the motor. Just give it a few cranks so that you can see if you're close or not. Good luck
05-29-2002 12:07 PM
If you've cranked the engine over very much without starting, your new cam is probably toast. It's supposed to fire right up and run with little or no delay, otherwise one or more of the cam lobes will be worn down and your new cam is trash. I'd check to make sure you're not 180 degrees out of time in the distributor (number 6 is firing instead of number 1). I hate to be the bearer of bad news, but I speak from first hand experience. Make sure the engine is timed right before you turn the key.
05-29-2002 06:32 PM
I tried the 180 degree rotation of the distributor. No luck. I'll get deeper into it this weekend. As I look back over the installation instructions, I lined the 2 sprockets up dot to dot, set the piston on #1 just begining the compression stroke and put the rotor pointing to #1 lead in the dist. cap. That seems odd. Why not go to TDC on #1? Anyway, thanks for your suggestions. Hopefully the cam is still good.
4 Jaw Chuck
05-29-2002 07:21 PM
The piston should be at TDC in compression on #1 when aligning the rotor to #1 cylinder, the cam will be fine unless you are running Nascar level springs and a 600+ lift cam. If you are, pull the cam and relube before firing it up.