Collection of Early LT5 VIN, MM Numbers

[A26B]

Some of this has already been offered in other recent threads about miss-stamped or revised VIN & Serial Numbers. With the recent interest in early ZR-1's, I'm publishing some data acquired in the LT5 engine acquisition I made a few years back which contained some great pieces of LT5 history. I hope it will be interesting, possibly answer some questions or spark new possibilities.

I do have a lot of pictures of these engines. Unfortunately, I didn't photo-document them as well as I would now.

Jerry

[QB93Z]

Thanks for posting that list Jerry.

I don't have any data on the pre-1990 cars.

For the 1990's:
L5800005 is an RPO YE8 (Engineerling Test Vehicle)
L5800017 is an RPO ACM (Vehicle Lead Unit)
L5800079 no special RPO's
L5800130 no special RPO's
L5800703 no special RPO's
L5801085 is a Europe Export car, no special RPO's
L5802610 no special RPO's

For the 1991's:
M5800029 no special RPO's
M5800064 no special RPO's
M5800739 no special RPO's
M5801454 no special RPO's
M5802008 no special RPO's

For the 1992's:
N5800002 is an RPO YE8 (Engineerling Test Vehicle) & WD1 (Pilot Vehicle)
N5800004 is an RPO YE8 (Engineerling Test Vehicle) & WD1 (Pilot Vehicle)

Jim

[1989ZR1#74]

Oil pan stamping on #004: MM 0418

[1989ZR1#74]

1989 ZR-1 #074 has a upper LT5 case casting date of 12/19/1988.

[1989ZR1#74]

There is a picture in the January 1990 Vette of 3 "Pilot" LT5s taken in 12/1988. Two of them have numbers on the tags:


#375


Number 376:


Looks like 89 #62 had LT5 #373 so these must be around #62.

[1989ZR1#74]

Update on 1989 MM numbers:

#004 is MM 0418 CZA 218
#026 is MM 0514 CZA 230
#029 is MM 0421 CZA 223
#045 is MM 1020 CZA 352
#058 is MM 1220 CZA 375
#062 is MM 1216 CZA 373
#074 is MM 0308 CZA 612

[Toranamat69]

Hi Guys,

I was hoping to find out a little more about my LT5 I have fitted in my Torana.

I was told by the importer back in 2000 that it was a test engine when I bought it. I always thought it was a 1990 engine as all the parts seemed to correspond and fit.

I make the engine number out to be 1L5700024.
The engine number seems to be mis-stamped or something and the 'L' is a little shallow in the stamping but I have checked really closely and had others check and verify.

Going by other numbers in this thread, the 8 has been stamped as a 7 - this character is very clearly stamped.

The stamping on the pan rail is MM 0602 ZSH 656 - this is nice and clearly marked.

The date code on the block (from memory) is 04 24 89. My headers are too close to see this number whilst assembled in the car but I am pretty sure.

Where do I find the number on the heads? I seem to remember seeing them before - is it on the back face of the heads?

The wiring loom that came with the car was the manual A/C type which I understand was not very common.

There was 1 or 2 very minor differences to some of the other '90 engines I have seen such as the 1 mounting tab on the alloy PCV pipe rather than 2 that I see on most '90's and something else I can't remember at the moment. I have changed these items anyhow to improve it slightly.

It did not look like the engine had ever been fitted to a car. The clutch had certainly never been used to move a vehicle when I got it.

Any info on my engine would be appreciated.

Engine still runs great with the only thing the oil pressure being slightly lower than some of the figures I have seen for these engines but not by too much - I give it hell still so it is obviously not an issue.

Matt