Need Help with LT5 Serial number

[ImpalaSSpeed]

Help...
ok i am in the process of purchasing a Crated 405hp LT5 engine motor i asked the guy for the vin number he email me the Vin number/serial on the engine block, as i did some research on this great forum on how to read the correct vin/serial for the crated LT5 it show's that for it to be a 405hp motor it must read "10ZVC"

10ZVC is a mercury marine tracking # for a 93+ 405hp engine, BUT the sellers serial number that was sent to me reads "10ZUD" and his serial also was short one number it was only 14 numbers and not the correct 15 numbers, i am going to request that he take a picture of the serial number and email it me, i am wondering if "10ZUD" is the 1990-92 375hp engine, i faintly remember GM having some back-up/rebuild motors for engine's still under warranty, can someone give me insite info. to what "10ZUD" means
i want to purchase a 405hp crate motor but not a rebuild GM crate motor.

i hope this makes any sense.



thank you..

[GOLDCYLON]

Originally Posted by ImpalaSSpeed

Help...
ok i am in the process of purchasing a Crated 405hp LT5 engine motor i asked the guy for the vin number he email me the Vin number/serial on the engine block, as i did some research on this great forum on how to read the correct vin/serial for the crated LT5 it show's that for it to be a 405hp motor it must read "10ZVC"

10ZVC is a mercury marine tracking # for a 93+ 405hp engine, BUT the sellers serial number that was sent to me reads "10ZUD" and his serial also was short one number it was only 14 numbers and not the correct 15 numbers, i am going to request that he take a picture of the serial number and email it me, i am wondering if "10ZUD" is the 1990-92 375hp engine, i faintly remember GM having some back-up/rebuild motors for engine's still under warranty, can someone give me insite info. to what "10ZUD" means
i want to purchase a 405hp crate motor but not a rebuild GM crate motor.

i hope this makes any sense.



thank you..

Is it a 2 bolt or 4 bolt main. THe 405s had a 4 bolt main. Really easy way to determine what you got.

[A26B]

Originally Posted by GOLDCYLON

Is it a 2 bolt or 4 bolt main. THe 405s had a 4 bolt main. Really easy way to determine what you got.

Since the pan is still on & the seller is unlikely to want to remove it, there are other ways.

The easiest is:
The 405 Hp engines are EGR equipped. A complete crate engine will have all of the plumbing on it with that heat-sheilded tube running from the EGR valve to the plenum.

[ImpalaSSpeed]

i requested for a better pics of the crate motor.. the one's that i have seen are at angle only facing the front of the motor.. hopefully i get the email pic of the block production/serial number.

[Jagdpanzer]

I recall seeing a post either here or other on the ZR-1 section of Corvette Forum that gave a breakdown for each model year based on the numbers and letters stamped on the engine block. Does anyone remember when and where this imformation was posted?