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Old 03-24-2013, 02:41 PM
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Jeff Hamlin Jeff Hamlin is offline
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Question Crankshaft # ID

Tearing down a '69 250 Sprint and came across a number I am not sure of.
It's either 3878802 or 9878802 I don't have anything on my list for this one.
Any help identifying greatly appreciated.

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Last edited by Jeff Hamlin; 06-15-2014 at 08:22 PM.
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Old 03-24-2013, 03:55 PM
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Not able to answer your question but it does raise another.

Check and see if the 69 Sprint Rods are "special" or not. Do they look like all the other rods that our OHC's use or are they different? Pics?

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69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213)
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Old 03-24-2013, 06:39 PM
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Looks like the same casting # thats on my 69' 250 1bbl crank

I think your casting # is actually 3876802
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Last edited by hpp; 03-24-2013 at 06:54 PM.
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Old 03-24-2013, 08:01 PM
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whew,

Thanks I was beginning to think it was a Chebby crank swap.

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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.

Last edited by Jeff Hamlin; 03-24-2013 at 08:12 PM.
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Old 03-24-2013, 08:12 PM
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FYI;
Rods are no different the any of the others I have on hand.

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Old 03-24-2013, 08:29 PM
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Almost looks like the only difference between the 1bbl and 4 bbl crank is more holes drilled into the 4bbl cranks counterweights.

How do the journals look will the crank need any machine work or just a polish?

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Old 03-24-2013, 08:37 PM
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Quote:
Originally Posted by Jeff Hamlin View Post
FYI;
Rods are no different the any of the others I have on hand.
would you please REPEAT that very loudly for those that are hard of hearing

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Old 03-24-2013, 08:41 PM
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Quote:
Originally Posted by hpp View Post
Almost looks like the only difference between the 1bbl and 4 bbl crank is more holes drilled into the 4bbl cranks counterweights.

How do the journals look will the crank need any machine work or just a polish?
that will vary from one crank to the next
only part of rotating assembly that differs from 1 to 4bbl was the damper and bearings

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Old 03-25-2013, 05:54 AM
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Quote:
Originally Posted by Cammer-6 View Post
would you please REPEAT that very loudly for those that are hard of hearing
NOW HEAR THIS,
THERE IS NO DIFFERENCE BETWEEN THESE RODS AND THE OTHERS I HAVE IN STOCK!
THAT IS ALL.

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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
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Old 03-25-2013, 11:23 AM
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Quote:
Originally Posted by Jeff Hamlin View Post
NOW HEAR THIS,
THERE IS NO DIFFERENCE BETWEEN THESE RODS AND THE OTHERS I HAVE IN STOCK!
THAT IS ALL.
HIS?
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Old 03-25-2013, 11:26 AM
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Quote:
Originally Posted by Jeff Hamlin View Post
NOW HEAR THIS,
THERE IS NO DIFFERENCE BETWEEN THESE RODS AND THE OTHERS I HAVE IN STOCK!
THAT IS ALL.
ROTFLMAO

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69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213)
99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale
http://sohcsix.yuku.com/forums/1/OHC-lounge
Wanted: 1969 OHC "H" Camshaft
  #12  
Old 03-25-2013, 11:48 AM
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lol

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  #13  
Old 04-17-2023, 07:29 PM
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Quote:
Originally Posted by hpp View Post
Looks like the same casting # thats on my 69' 250 1bbl crank

I think your casting # is actually 3876802
Just discovered the crankshaft in my '68 casting date 250 is also 3876802. A quick online search seems to indicate this is a Chevy crank. Is this in fact a correct/original Pontiac part/part number, shared with Chevy I6 engines?

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Old 04-18-2023, 06:27 AM
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OHC CRANKSHAFT NUMBERS I HAVE ON FILE;

9782279 ‘66-67-230
9790154 ‘68-69-250
3876802 ’69-250

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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
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Old 04-18-2023, 09:48 AM
In_The_Pink In_The_Pink is offline
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Thanks, Jeff. I had seen the first two listed online, but not the third number, so thanks for confirming.

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