Timing Marks

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Old January 23rd, 2009 | 08:48 PM
  #1  
iam2fast4u86's Avatar
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Timing Marks

Can anyone tell me the proper way to allign timing marks on a 350 or 403 when Removing & installing a cam or timing chain?
Old January 24th, 2009 | 06:59 AM
  #2  
joe_padavano's Avatar
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Originally Posted by iam2fast4u86
Can anyone tell me the proper way to allign timing marks on a 350 or 403 when Removing & installing a cam or timing chain?
Since the cam rotates at half the crank speed, either way is correct. Either both at 12:00 or crank at 12:00 and cam at 6:00. Of course, you still need to make sure the distributor is installed with No. 1 firing on the compression stroke, not the exhaust stroke.
Old January 24th, 2009 | 07:23 AM
  #3  
iam2fast4u86's Avatar
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There are 2 timing marks on my crank sprocket. Is the correct timing mark the one to the left of the shear pin or to the right?
Old January 24th, 2009 | 09:44 AM
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Originally Posted by iam2fast4u86
There are 2 timing marks on my crank sprocket ........
What manufacturer and part number?

Norm
Old January 24th, 2009 | 09:58 AM
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The crank sprocket that is in the 350 has 2 marks on it. It seems to be original because it still has the plastic like cam sprocket on it. 1 is to the left of the shear pin and the other is to the right. I am in the process of tearing the 403 timing cover off so I don't know if that is the same way or not. The new one I bought from coyles just has the 1 mark to the left of the shear pin so I guess I just answered my own question. Any advice on getting the crank sprocket off without damaging anything?
Old January 24th, 2009 | 08:55 PM
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Regular gear puller.

Norm
Old January 26th, 2009 | 08:13 PM
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Danny Wiseley's Avatar
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Originally Posted by iam2fast4u86
>snip< Any advice on getting the crank sprocket off without damaging anything?
On my '79 350, I had to pull the key out of the crankshaft before the sprocket would come off. Slot in sprocket doesn't go full width.
DW
Old February 4th, 2009 | 07:31 AM
  #8  
iam2fast4u86's Avatar
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Got the timing chain in the 403 and timed it. Soon after that the lower end started knocking. I have shipped my 350 out to be machined and will be rebuilding it as soon as it gets back. Thank you for all of your help and I have learned that its always good to have a spare engine hanging around!
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