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Old 01-13-2014, 01:50 PM   #1
30ccpickup
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Default Crank Pulley

The crank pulley on my Model A shattered and I am in the process of replacing it with an original.
I am looking for tips on how to seat the rope on the block without removing the crank.


Thanks gentleman, I answered my own question. I assume you pull the timing gear cover off, soak the rope in oil and seat it with a socket. I bought an engine stand and I guess I am not use to looking at it upside down.


Paul
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Old 01-13-2014, 02:28 PM   #2
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Default Re: Crank Pulley

I just replaced the seal in the pan, didn't mess with the block. But my engine rebuild was fairly new at the time.
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Old 01-13-2014, 03:16 PM   #3
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Default Re: Crank Pulley

Your picture shows an aftermarket two-piece pulley. Nothing but trouble. As long as you have the engine on a stand, replace it with an original type single piece cast iron pulley. If you polish the seal surface on the new pulley with a drop of oil and some crocus cloth it will last forever.
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Old 01-13-2014, 05:15 PM   #4
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Default Re: Crank Pulley

Ah. Engine out, then do as Mike suggests.
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Old 01-13-2014, 05:55 PM   #5
Purdy Swoft
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Default Re: Crank Pulley

The rope seal isn't in the block. The upper half of the rope seal is in the timing cover and the lower half is in the oil pan.
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Old 01-14-2014, 12:31 AM   #6
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Default Re: Crank Pulley

Paul,
I concur with MikeK that the pulley shown is a junk aftermarket part and they are nothing but trouble. replace with a one piece if the engine is out of the car or two piece if in ( use current quality repro one from Brattons or Snyders). As previously said you can replace the seal by removing the timing cover on the upper half and remove the oil pan to replace if desired on the lower. Personally I would not do it unless leakage is a problem. Polish the seal surface a little and should help.
while you're at it and down there make sure you have the correct original front engine mount and springs installed. See the service bulletins for installation

Best of luck!
Larry S
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Old 01-14-2014, 09:52 AM   #7
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Default Re: Crank Pulley

Thanks, all great info. If all goes well, mainly the temperature, I will be reassembling this weekend.

Paul
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Old 01-14-2014, 07:31 PM   #8
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Default Re: Crank Pulley

The leading edge (rearmost) of the pulley sleeve is made to a taper. I have speculated that this was a manufacturing expediency adopted by Ford for putting the pulley/sleeve in place after assembly of the motor.

You may be able to land the lower seal in the oil pan groove (without taking the pan off) and then press in directly on the sleeve/pulley and cause the taper to compress the lower seal rope. THEN put on the upper cover with it's seal rope doing the "push down" thing on the cover to get the bolting to line up.

Or you may be able to install both upper and lower seal in their grooves, assemble both pan and cover to the block, and then gently push in the sleeve thereby compressing both upper and lower (and maintaining the best possible seal around the oil pan gasket/front cover.)

This the way I think Ford did it originally.

Something I'm going to experiment with on the next engine build.

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