M30 Cam Timing FAQ

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Andrew in Calgary
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M30 Cam Timing FAQ

Post by Andrew in Calgary » Wed Aug 30, 2006 12:55 am

Courtesy of Peter Florance



There is some misunderstanding about timing the M30 motor. This FAQ should help the "I got the motor back together but it won't start" problem.

Below is a picture of the harmonic balancer with the crankshaft at top dead center. Note this occurs twice for every single rotation of the cam and distributor.

Image

At TDC of #1 cylinder (compression stroke) the cam should be aligned as shown below:

Image

Both valves on #1 cylinder should be closed (low spot on both cam lobes - this is important) and the distributor rotor should be pointed to #1 wire.
Timed like this, the engine should run. If idle is really low and smooth, it's likely you are one tooth off on cam timing.

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