dampener keyway lost
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From: Utah
dampener keyway lost
I have lost the key that indexes the balancer to the crank on my 390 project. I dissassembled over three years ago. yah I know. anyway, its gone and i cant remember what it looks like, ford says its obsolete. Parts store only show the pre- '63 units which are way too small, I'm thinkin' square stock, but i'm not sure. Can somebody give me a clue.
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From: Aurora, Colorado
dampener keyway lost
Man...I wish I had a good set of calipers. I have the exact key you are referring to downstairs in the garage...in a baggie! Sorry, but I have nothing to measure it with, otherwise I would give you exact sizeing. Bummer!!!!! And no...you can't have it! 
I need it for the engine it came from. If you can wait until Tuesday evening, I will take it into work and get exact sizes for it. Sorry, that's the best I can do.
Chad Burns
1968 F-250 390
Aurora, CO.
I need it for the engine it came from. If you can wait until Tuesday evening, I will take it into work and get exact sizes for it. Sorry, that's the best I can do.Chad Burns
1968 F-250 390
Aurora, CO.
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From: Utah
dampener keyway lost
Chad, that would be cool. I think that 1/4" stock would work, but if you could get the exact length for me that would be great. I'm worried that if it were too long, It would push too hard against the sleeve, therefor pushing against the slinger and the timing gear. If I cut it too short, there might be strength issues. Is plain old square stock going to be strong enugh?
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From: Long Island USA
dampener keyway lost
I found the key from a '67 390 I have apart in my garage.
It is .761" long, and .251" wide. Notice that it is .251, not .250 (1/4"). This is the interference fit that is needed to keep it in place.
The worn area where it was already inserted into the crankshaft snout is .250", but is .251" in all other locations. Actually it is more like .2515, but I have dial calipers and can't be more accurate than that.
Check the width of the cut in the snout to make sure I have the right key.
art k.
It is .761" long, and .251" wide. Notice that it is .251, not .250 (1/4"). This is the interference fit that is needed to keep it in place.
The worn area where it was already inserted into the crankshaft snout is .250", but is .251" in all other locations. Actually it is more like .2515, but I have dial calipers and can't be more accurate than that.
Check the width of the cut in the snout to make sure I have the right key.
art k.
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From: Utah
dampener keyway lost
Thanks Art, you're my hero. I work at an auto parts store and I have some plane old square stock that mics at .251, however it does'nt appear to be hardened, it's shinny like chrome or nickel. Does anybody think this will do the job, or should I find something else.
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From: Long Island USA
dampener keyway lost
Originally posted by chissler
Thanks Art, you're my hero. I work at an auto parts store and I have some plane old square stock that mics at .251, however it does'nt appear to be hardened, it's shinny like chrome or nickel. Does anybody think this will do the job, or should I find something else.
Thanks Art, you're my hero. I work at an auto parts store and I have some plane old square stock that mics at .251, however it does'nt appear to be hardened, it's shinny like chrome or nickel. Does anybody think this will do the job, or should I find something else.
The crank is plain cast-iron. The harmonic balancer is plain cast-iron. I would think what you describe is perfect key material. The key I have must be steel because I can hardly make a mark on the end of it with a pair of vice-grips. Pretty hard stuff.
ak
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From: Long Island USA
dampener keyway lost
Originally posted by chissler
Can we verify the length on this key way? .761" would probably work great, but it sounds a little short to me, could it be 1.761"?
Can we verify the length on this key way? .761" would probably work great, but it sounds a little short to me, could it be 1.761"?
Isn't the slot in the crank curved upward at the aft end?
ak
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From: Utah
dampener keyway lost
Yes the slot in the crank curves up and dissapears, but that happens way back and underneith the sleeve. The sleeve fits onto the key for the timing gear, right? and then the dampener key butts up against the sleeve? I'll check it out tonight. Am I lost?
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From: Littleton, CO
dampener keyway lost
Chissler:
How soon do you need the pin??? I know I have an extra one floating around the garage someplace I can mail to you. Drop an address if you wish and I'll send it out. The salvage yard always manages to have at least one or two FE's lying around. May want to make a visit there as well.
--Mike G
How soon do you need the pin??? I know I have an extra one floating around the garage someplace I can mail to you. Drop an address if you wish and I'll send it out. The salvage yard always manages to have at least one or two FE's lying around. May want to make a visit there as well.
--Mike G
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From: Utah
dampener keyway lost
Thanks for your generosity Mike, but I already built one. I can't believe it, I've got four "basket case" FE's in my garage and not one of them had a key. The one I built is on and worked great. I'd like to thank all of you who helped me with this tiny problem. I hope I can return the favor.
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