1937 crank pulley seal?

[Solo_909]

Hey fellas,

So my crank pulley is leaking so I assume it’s the seal. I recently purchased this but is it correct for my car?



I understand that originally it had some sort of rope seal but I want to upgrade it so I don’t have any issue I’m the future.

With that said will this kit work even though it says 49-53?



Any mods I need to do to the crank shaft?

[flatjack9]

In order to use the metal sleeve, you will need to remove a like amount from the crank pulley. No mods to the crank shaft.

[Solo_909]

Originally Posted by flatjack9

In order to use the metal sleeve, you will need to remove a like amount from the crank pulley. No mods to the crank shaft.

Do I need the metal sleeve?

[tubman]

I would say if the OD of the pulley and the sleeve are exactly the same, no.

[flatheadmurre]

If the pulley isn´t worn it wil work fine...they can have kind of a valley in them from the ropeseal wearing against it.
Cutting the pulley depends on how they are built...some just have the contact area against the crank at the ends and you end up with a loose fitting pulley.
A speedy sleeve might be a better option in that case.

[Brian]

Sponsored Links (Register now to hide all advertisements)

And some pulleys have a helical groove cut into them. These are not too good with your one piece type seal. So if you have this style, machine grooves off and fit a thin wall sleeve, then the seal will have a smooth surface to run on. To fit the seal you'll need to remove the timing cover and oil pan. Normally use silicon rubber sealant or similar to glue the seal into the grooves. A bit of work to cure a leak. Good luck

[RKS.PA]

I think the sleeve that comes with the one-piece seal will not work on your pulley, i.e. too thick. But, as noted above, a speedy sleeve to cover the groves will do the trick and no more leaks!!!

Dick.

[Solo_909]

So here’s the crank pulley I have now. It fits over the crank shaft fairly tight but I’m able to slide it on and off without any tools and there is a very minut amount of wiggle if I wiggle it. I assume the metal sleeve won’t wrk with this type of fit. So my question is do I have the wrong rubber seal or will the one I have still work?

[JSeery]

See the groove worn into the pulley seal area? You are going to have to address that issue.

[flatjack9]

Your rubber seal will work but as noted, you need to repair that groove worn in it.

[Solo_909]

Originally Posted by JSeery

See the groove worn into the pulley seal area? You are going to have to address that issue.

How do I fix that?

[RKS.PA]

Solo, I believe the speedy sleeve is your easiest way to provide a smooth surface for the new neoprene seal. It will cover up the groove. You drive the sleeve onto the pulley snout. It come with a "cap" to allow you to press the sleeve on.

Dick.

[JSeery]

You should be able to get a sleeve that will fit it with minor cleanup of your current surface.

[Solo_909]

Originally Posted by RKS.PA

Solo, I believe the speedy sleeve is your easiest way to provide a smooth surface for the new neoprene seal. It will cover up the groove. You drive the sleeve onto the pulley snout. It come with a "cap" to allow you to press the sleeve on.

Dick.

Awesome, do you have a link to the “speedy sleeve?”

[RKS.PA]

The full name of the ones I've used is SKF Speedi-Sleeve. Try www.skf.com and see if that gets you there.

Dick.

[Seth Swoboda]

Originally Posted by Solo_909

How do I fix that?

Buy the replacement sleeve with no spiral groove cut into it. Then have someone machine off the old sleeve on your pulley in the equivalent length of the new smooth sleeve. the new sleeve can be welded to the original pulley, also. Any reputable machine shop can do this easily. Contact VanPelt sales for the replacement smooth sleeve.

[Seth Swoboda]

Originally Posted by flatjack9

In order to use the metal sleeve, you will need to remove a like amount from the crank pulley. No mods to the crank shaft.

Do as Flatjack has recommended. This is also what I described.

[Solo_909]

Originally Posted by RKS.PA

The full name of the ones I've used is SKF Speedi-Sleeve. Try www.skf.com and see if that gets you there.

Dick.

Originally Posted by Seth Swoboda

Buy the replacement sleeve with no spiral groove cut into it. Then have someone machine off the old sleeve on your pulley in the equivalent length of the new smooth sleeve. the new sleeve can be welded to the original pulley, also. Any reputable machine shop can do this easily. Contact VanPelt sales for the replacement smooth sleeve.

Thanks guys, so this is getting a little to over my head and skill level just to fix the crank pulley lol. Looking. At the Speedo sleeve, I have no idea what size, width, length, or any of that info to order one. Can’t I just buy a new pulley?

[Tony, NY]

Speedi-sleeve by Chicago Rawhide. #99162. NAPA did sell them. Here it is. I used this one on my '51 Merc. Check size against yours.
https://www.napaonline.com/en/p/NOS99162
Install video https://www.youtube.com/watch?v=5XIjYuhxKsw

[RKS.PA]

Solo, the install video that Tony referenced above will give you a better picture on how these thin sleeves work on our flat head pulleys. If you don't feel comfortable or have access to a micrometer to measure diameter and length of the area you need to repair, another option is to take your pulley to a machine shop and let them put the proper sized sleeve on for you. As to whether or not you can buy a new pulley, bear in mind that these were all intended to be used with the rope seal, so finding one that's set up for the new one piece might be a challenge.

Dick.