1964-1990 Oldsmobile V8 engine information

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m (Reverted edits by 85.115.54.180 (talk) to last revision by Cobalt327)
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The letter indicating factory must match the letter in the sixth position of the car's VIN (it should also, of course, match the factory indication on the body data plate - in other words, for a Lansing-built car, the sixth place in the VIN would be an "M", the body data plate should indicate "LAN", and the third place in the engine ID should also be an "M").
 
The letter indicating factory must match the letter in the sixth position of the car's VIN (it should also, of course, match the factory indication on the body data plate - in other words, for a Lansing-built car, the sixth place in the VIN would be an "M", the body data plate should indicate "LAN", and the third place in the engine ID should also be an "M").
  
Now, obviously this doesn't provide all of the information you're looking for, but you do get something. Year of manufacture is nice to know. Additionally, the manufacturing plant may provide some info as to the motor's original use. For example, if the letter is an "X", that signifies Kansas City, which only produced full size cars (88 and 98). Framingham (the letter escapes me at the moment) built only A-bodies. Lansing, on the other hand, built all Olds car lines (surprise), so an "M" doesn't tell you much.
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Now, obviously this doesn't provide all of the information you're looking for, but you do get something. Year of manufacture is nice to know. Additionally, the manufacturing plant may provide some info as to the motor's original use. For example, if the letter is an "X", that signifies Kansas City, which only produced full size cars (88 and 98). Framingham ("G") built only A-bodies. Lansing, on the other hand, built all Olds car lines (surprise), so an "M" doesn't tell you much.
  
 
If the motor has a number stamped which doesn't match the above, it's a non-original motor from another car. If it doesn't have any number stamped at all, it could be one of two things. First, it could be a dealer-installed factory service block, which would come without a VIN derivative. The dealer should have stamped the new block with the VIN derivative, but may not have. The other possibility is that it's a 1965-'67 block (i.e., a short-stroke 400 or a 425), as these motors did not have the VIN derivative stamped on the block. Note that obviously this latter option can be checked by looking at the block casting letter ("D" for the 425, "B" or "E" for the 400 - as opposed to "G" for the correct 1968 long-stroke 400).
 
If the motor has a number stamped which doesn't match the above, it's a non-original motor from another car. If it doesn't have any number stamped at all, it could be one of two things. First, it could be a dealer-installed factory service block, which would come without a VIN derivative. The dealer should have stamped the new block with the VIN derivative, but may not have. The other possibility is that it's a 1965-'67 block (i.e., a short-stroke 400 or a 425), as these motors did not have the VIN derivative stamped on the block. Note that obviously this latter option can be checked by looking at the block casting letter ("D" for the 425, "B" or "E" for the 400 - as opposed to "G" for the correct 1968 long-stroke 400).

Revision as of 23:09, 13 November 2017

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