crankshaft rope seal question

[[email protected]]

I am in the process of rebuilding a stock model a engine. While taking it apart I found a rope seal on the rear main and the block. Can anybody tell me some info on this, where to buy replacement rope, how long does this last, anything to installing it? thanks for the info, steve

[Kurt in NJ]

on some i have seen it as a desperate attempt at stopping a leak, no other modifications, others the slinger has been cut off and other modifications.
It’s best if you can post pictures of what you have.

[J and M Machine]

Originally Posted by [email protected]

I am in the process of rebuilding a stock model a engine. While taking it apart I found a rope seal on the rear main and the block. Can anybody tell me some info on this, where to buy replacement rope, how long does this last, anything to installing it? thanks for the info, steve

Model A engines don't use a "rope seal" just a slinger.
I have enclosed pictures of the crank and rear main so you can see what stock Model A should look like.
www.jandm-machine.com

[[email protected]]

This crank has been machined for the rope seal . That is why I am asking questions. steve

[nkaminar]

You could try the rope seal that is used in the front. Maybe more than two pieces. The modern rope seals are Teflon impregnated so they last longer. You may have to cut down the size of the front seals. You can also buy lip seals that are in two pieces. Try the ones that are used on small block Chevy V8's.

[Jim Brierley]

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I've used seals from older cars, flathead V8's, Chevy 6's, etc. You could also get some graphite rope as used by plumbers. You may have to put a piece of small copper tubing to support it.

[Dan McEachern]

A rear seal from a 216 CI 6 cyl Chevy is a rope seal that will work just fine.


here is 1 part number that you might try. Rock Auto is out of stock on this but...……..


VICTOR REINZ 191015201

[JOES31]

Check out a rope seal from a WWII jeep L head 134 motor.




MB GPW, MB GPW Partscrankshaft seal, rear main, FELPRO -637237,MB,GPW,637237 Jeep G503 RFJP VintageJeeps
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crankshaft seal, rear main, FELPRO -637237 Felpro
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crankshaft seal, rear main, FELPRO

installation video

https://youtu.be/vVLXAGKjnGI

Automotive Engine Rebuilders Association, AERA TB2025

[Terry Burtz, Calif]

The surface finish on the slinger of a stock Model A crankshaft is rough and similar to the surface finish on a smooth concrete sidewalk.

Any packing will work until it is abraded away.

A better solution is to create a smooth surface on the crankshaft so the packing is not abraded.

Other solutions include the use of radial lip seals that are used on modern engines.

[[email protected]]

thanks, steve