Block Casting Help.
Thread Starter
Team Owner
Joined: Aug 2006
Posts: 24,125
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From: Columbia Missouri
Block Casting Help.
I have tried to find the origin of this block using all my sources that I use when trying to help other people but I can't get a hit on it.
Can any of you shine some light on this block casting number from the front pad?
CE3N55093
Thanks,
Can any of you shine some light on this block casting number from the front pad?
CE3N55093
Thanks,
Thread Starter
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
CE = Chevrolet Engine (essentially, a counter engine)
3 = probably 1973, but will depend on the casting number/date
N55,093 is the sequence number from that particular engine facility
What is the casting number and casting date?? They usually help with deciphering these numbers.
3 = probably 1973, but will depend on the casting number/date
N55,093 is the sequence number from that particular engine facility
What is the casting number and casting date?? They usually help with deciphering these numbers.
Well that was the mystery, cause the casting number is 3970010, which according to Mortec, can be a:
1969 4 bolt 302 from a Z28 Camaro...or a...
1969 2 bolt main 327 from a truck...or a...
1969 - 1980, 2 or 4 bolt main 350...
The date code is JUST a 3, so I got no help from that either.
Does that mean anything to you guys?
Thread Starter
Team Owner
Joined: Aug 2006
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From: Columbia Missouri
"the date code is just a 3" ... is that the casting date as located on the rear passenger side of the block behind the distributor??
If yes, you have a replacement block from 1973. It's not from Flint, as their CE sequence numbers were 20,000 to 49,999, if I remember correctly ... so maybe from McKinnon or Tonawanda or ??
2 bolt or 4 bolt??
If yes, you have a replacement block from 1973. It's not from Flint, as their CE sequence numbers were 20,000 to 49,999, if I remember correctly ... so maybe from McKinnon or Tonawanda or ??
2 bolt or 4 bolt??
Yep it's just a 3, right next to the arrow with the circle of dots, and just on top of the driver's side top bell housing bolt casting.
It's a 2 bolt main block.
Also, I had heard that if the engine has a square plug in an oil hole in the front of the block, just above the timing cover and off to the passenger side just a bit...that it was a flint engine. Is that not correct?
Thread Starter
Team Owner
Joined: Aug 2006
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From: Columbia Missouri
Okay, the date code looks like B233. It was on the passenger side, where I didn't even bother looking. I assumed the 3 was in the date code location.
Thread Starter
Team Owner
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From: Columbia Missouri
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Thread Starter
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Oh I see, you mean the CE - 3 - N55093 of the front pad number.
Assuming the 3 is because it was a '73, does this mean a 2 would be '73, 5 would be '75...yata yata?
Thread Starter
Team Owner
Joined: Aug 2006
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From: Columbia Missouri
This is fun, okay, here's a set of numbers from a 400. I found the block casting, but still don't know how to decipher the date code of the pad code.
T10140SA
3951511
J12-72
T10140SA
3951511
J12-72
Thread Starter
Team Owner
Joined: Aug 2006
Posts: 24,125
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From: Columbia Missouri
J1272 = October 12, 1972 casting date (cast in Tonawanda)
3951511 = 400ci - 1970-73 - 4 bolt - Some replacement blocks had 2-bolt main caps
T1014 = Tonawanda October 14, 1972 engine build date
OSA ... there is no OSA suffix code . I suspect it is really CSA.
CSA = 1973 400ci Impala 150hp LF-6 TH400 2bbl carb
http://www.mortec.com/castnum.htm
http://www.chevymania.com/partsid/su...fm?block=small
3951511 = 400ci - 1970-73 - 4 bolt - Some replacement blocks had 2-bolt main caps
T1014 = Tonawanda October 14, 1972 engine build date
OSA ... there is no OSA suffix code . I suspect it is really CSA.
CSA = 1973 400ci Impala 150hp LF-6 TH400 2bbl carb
http://www.mortec.com/castnum.htm
http://www.chevymania.com/partsid/su...fm?block=small
Sweet, thanks.
