'66 - 427 / 425 Question

[Zachary K.]

Trying to cure an oil leak at the crank seal timing case cover. Vibration dampner has been sleeved and vibration dampner seal is new and installed correctly. Before this gets put back together I am wondering if an oil slinger belongs on the crank before the timing case cover is installed. I have checked the GM Illustrated parts manual (mine is effective Sept '80) and it shows a slinger on a page listed as 1955 to 1968 V8 Engine, unfortunately the part is not serviced so I can't go to the application section to see if this engine gets one or is supposed to have one. This engine was rebuilt recently and it might have been left off and I'd like to install one if it is supposed to be there just to keep the extra oil away from the seal area.

Thanks for the help!!

[Michael H.]

Re: '66 - 427 / 425 Question

Zachary,

Is this an original 66 block and correct original timing chain cover? If so, the problem is probably the fact that 65 and 66 big blocks didn't have dowel pins in the front of the case for the timing chain cover alignment and the cover was allowed to move around quite a bit. In place of the dowel pins, GM used a different method of aligning the cover/seal. With the cover loosly installed, a special Kent Moore tool that resembled the hub of the harmonic balancer was to be slid over the nose of the crankshaft to center the cover/seal before the cover bolts were secured.

If this Kent Moore tool isn't available, you can use the existing balancer if you install it just far enough to get the hub into the seal, then snug as many bolts as you can with the balancer in place. Remove the balancer again and secure the rest.

Joe Lucia told me the correct Kent Moore tool is still available but I don't have the number that he gave me handy. If he doesn't see this post and give you the number, I'll dig it out for you. It's here somewhere in all this rubble.

Michael

[Joe L.]

Re: '66 - 427 / 425 Question

Michael and Zachary----

The tool is Kent-Moore J-22102. Be prepared for a stiff price, though. Most of the Kent-Moore tools have increased in price DRAMATICALLY over the past few years. Some have doubled or tripled.

Your application did not use an oil slinger. Most small blocks didn't either. The inclusion of that item in the P&A diagram is an anachronism.

[Craig S.]

Re: '66 - 427 / 425 Question- price update

I sent an email inquiry to Kent-Moore yesterday with this tool number, and received the following response:

"Craig,

Thank you for your inquiry. The list price on the item you provided is as follows:

J-22102 = 139.60 item is in stock

Best Regards,
June"

I am guessing this is basically a "sleeve" with the OD being the harmonic balancer seating surface OD, and the ID being a slip fit on the crankshaft snout. Seems like a fairly easy tool to fabricate for much less.......Craig

[Michael H.]

Re: '66 - 427 / 425 Question- price update

Craig,

I agree. In fact, if you have an old balancer from any passenger car big block, it could be sacrificed to make the tool. Wouldn't be difficult to remove most of the balancer part from the hub and then just remove a bit of material from the ID so it slip fits. That way you would still have the keyway so the key in the c/shaft snout wouldn't have to be removed in order to use a sleeve without the keyway.

Michael

[Clem Z.]

Re: '66 - 427 / 425 Question- price update

craig i made mine from a piece of aluminum with a bevel cut on one outside edge to help insersion past the seal. you must also mill a groove in the inside diameter to clear the key in the crank

[Tom D.]

Great Discussion - Thanks! *NM*

[Craig S.]

Re: '66 - 427 / 425 Question- price update

Clem and Mike - both good suggestions! I have a metal lathe so this is not that difficult a project...the other thought I had was a BB crank socket could be sacrificed, but I am not sure they fit tight enough.....I have one but haven't checked yet....Craig

[Clem Z.]

Re: '66 - 427 / 425 Question- price update

mine is 2.335 OD,1.605 ID and 1.250 thick with a notch in the ID for crank key clearance

[Michael H.]

Re: '66 - 427 / 425 Question- price update

Joe/Craig,

I was just looking in the factory O.H. manual and happened to notice the number was different than the one that was posted in the above thread. The number in the book is J-21202, not J-22102. Just wondered if this number would be a lot cheaper than the one that you submitted to Kent Moore. Hope so.

Michael

[Craig S.]

Re: '66 - 427 / 425 Question- price update

Michael - I was going by Joes number here, I don't know to be truthful which is right. I will probably just make my own however, I bet Kent Moore has a minumum price of $100 LOL. Here is their website if you want to check, just email, and they will mail you back.....Craig




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