Conversions & Swaps LSX Engines in Non-LSX Vehicles
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LR4 serial number location

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Old Jun 22, 2021 | 07:59 AM
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Default LR4 serial number location

I have a 2001 LR4 (4.8) and I don't see a serial number in the typical locations. Is there another spot or have the numbers just corroded away? I'm looking for the numbers so I can get


a new title for my 49 Chevy. Michigan requires pre-1955 cars to have engine serial number as the new VIN. I do have a copy of the donor truck title and I emailed the SOS on what to do without an engine serial number.
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Old Jun 22, 2021 | 08:24 AM
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What kind of serial number? Like a ten digit or something? The only numbers I have ever known to be on the block is the cast number 3 digit
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Old Jun 22, 2021 | 11:26 AM
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As you may know that older vehicles used the number on the block as a VIN. The practice was done away with back in the '50s some time. Newer engines do not have a serial number stamped on them either. What I would do is use the VIN from the '49 (if you have it) and stamp it on the block.
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Old Jun 22, 2021 | 11:27 AM
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No no no put some crazy numbers on there like 69420 blah blah blah and do it like that
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Old Jun 22, 2021 | 12:22 PM
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Originally Posted by 33willys
As you may know that older vehicles used the number on the block as a VIN. The practice was done away with back in the '50s some time. Newer engines do not have a serial number stamped on them either. What I would do is use the VIN from the '49 (if you have it) and stamp it on the block.
I know VIN's are not on LS engines. I could use the 49's number since the original engine was scrapped, but I'm waiting for an answer from the SOS. Here are samples of numbers on LS blocks in the locations that I posted. Kudo's to the original posters.




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Old Jun 22, 2021 | 12:57 PM
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Huh that is strange I’ve never seen that before. Those are American engines, made for an American consumer I mean.

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Old Jun 22, 2021 | 01:14 PM
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SOS? What does that mean?
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Old Jun 22, 2021 | 01:37 PM
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Originally Posted by Jimbo1367
SOS? What does that mean?
Secretary of State. Some states have Department of Motor Vehicles (DMV), Michigan has the Secretary of State (SOS), They handle matters pertaining to motor vehicles, boats, and elections.
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