1964-1990 Oldsmobile V8 engine information
(→1968-later V-8 Engine:: typo) |
|||
| Line 58: | Line 58: | ||
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). | ||
| − | Some blocks before 1977 have their ID cast above the right hand center freeze plug, e.g. "D" for 425, "F" for 455. Olds didn't cast the displacement into the side of the blocks until they went to the lightweight design in 1977. The 1977 and newer blocks will have the cubic | + | Some blocks before 1977 have their ID cast above the right hand center freeze plug, e.g. "D" for 425, "F" for 455. Olds didn't cast the displacement into the side of the blocks until they went to the lightweight design in 1977. The 1977 and newer blocks will have the cubic inch displacement (i.e. 403, 455, etc.) cast in large raised numbers right above the passenger side center freeze plug. The 307 will be in liters (5L), and a diesel engine will have the letters "DX" on it. The engine VIN letter will also be cast into the side of the block. Note that the 260 blocks sometimes have the last 3 digits of the casting number cast there, "355", which could be rather misleading. |
The VIN in 1972 and newer cars tells you what engine the car came with. | The VIN in 1972 and newer cars tells you what engine the car came with. | ||
Your Privacy Choices