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Old 01-02-2003, 05:29 AM
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Post New Cam Problem

I just put a new cam in my 350 and was lining up the marks on the crank gear and the cam gear when I noticed the valves, one was just closing and the other was just begining to open. like it was at the end of the exhaust stroke. Isn't it supposed to be between the compression and power stroke? I tried to figure out how to get it on the compression stroke but cant figure out how. when I put the pistion on the compression stroke the dot on the cam sproket it at the top. What am I doing wrong?

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Old 01-02-2003, 05:48 AM
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It doesn't sound like you're doing anything wrong. If you turn the motor over one more revolution and the dots line up than you're all set. Remember that the crank turns at twice the speed as the camshaft. The only thing is to make sure you put the distributor back in pointing at #1 with the motor on the compression stroke at TDC.
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Old 01-02-2003, 06:39 AM
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If the dots line up it looks like the cam is between the exhaust stroke and the intake stroke not on the compression stroke.
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Old 01-02-2003, 07:34 AM
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When your dots line up on the cam and crank sprockets, check # 6 it's probably on compression stroke, spin the crank around 1 revolution back to TDC now your on # 1 compression, the crank dots pointing straight up, and the cam dot's pointing straight up, now you know where you are, and your good to go.
Aligning the dots at installation is insuring that the relationship between the crank and cam are where they need to be. Hope this helps.
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Old 01-02-2003, 07:57 AM
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It very well may be that it is between the two cycles. The dots are there as a reference to get the cam timing correct. The dots pointing at each other does not mean that the motor is on the compression stroke. The dot on the cam gear could also point straight up, but this would make lining them up much more difficult because of the distance between them. Like I said just make sure the distributor is firing on the compression stroke.
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Old 01-02-2003, 08:43 AM
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Thank Guys,
I just wanted to be sure I had it right before I bolted everything back up.
Rodrunner
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