How can i determine year of L67 block - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-07-2008, 11:40 PM   #1
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Default How can i determine year of L67 block

the engine in my park ave is from a 93 olds ninety-eight.( or so i was told.)

but after reading how the hb and the cps pulses are different between the 92 and 93s, im a little confused. heres why. when i originally got the engine in i had tried to use a 93 pcm, and prom, it didnt start. i also had a 92 ssei prom, so i tried it, and it started up first try. so that would lead me to believe that the engine is a 92. considering i didn't change the hb. is there any numbers on the block i can use to trace the exact year?

i have also heard mention of a slight difference in the heads between the 92 and 93. i think it was rocker arm bolts, or studs, not 100% sure though. is there something i can measure to help ID?
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Old 04-08-2008, 02:15 PM   #2
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According to this:

http://64.233.169.104/search?q=cache...lnk&cd=2&gl=us

You should be able to determine 92 versus 93 with number of knock sensors and the block casting number
(where exactly to find the casting number, you got me hanging )

Quote:
•1990-’92 VIN L
The 3.8L block was updated with a one-piece rear seal in ’90. The Buick Regal was the only application for this engine in ’90, but the new “EV-6” motor was used for all the FWD cars and vans including the Lumina APV, Pontiac Transport and Olds Silouette from ’91 through ’92. Look for a block with either a 25532674 or 25534243 casting number.

•1993-’94 VIN L OR VIN 1 SUPERCHARGED
The earlier “EV-6” block was revised in ’93. It had an additional pad on the driver’* side for the knock sensor and another bolt hole in the left front corner, just below the deck surface, for an accessory mount. It’* either a 24502134 or a 24502441 casting.
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Old 04-08-2008, 02:17 PM   #3
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All Series 1'* have only ONE knock sensor on the rear bank in an oil passage/gallery. Whether there'* a SPOT for another I don't know, but all of them (L27 and L67 alike) only had one installed.

I would dig mine out and tell you, but I've wrapped and sealed it, and put it away.
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Old 04-08-2008, 02:18 PM   #4
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Poke around this site:

http://www.mortec.com/location.htm

I know it'* for V8s, but there might be some info for V6s. You might even want to email the admin to see if he can point you in the right direction.
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Old 04-08-2008, 02:26 PM   #5
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Look closely:
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Those are the Zilla'* original motor, this is the new motor from a 95 Riv in there now:

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Old 04-08-2008, 02:46 PM   #6
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93 blocks received a boss for a front knock sensor that the 93 L27 used. My 92 block has no boss under the front head for a knock sensor.
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Old 04-08-2008, 05:22 PM   #7
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the crank sensor issue has me confused even more now. on rock auto, the hb from 91-93 are the same for the L67, and 94-95 are different. now for the L27s they are the same from 91-92, and 93 to 95 are the same. but im just going to leave that out of the equation. that will just make it more complicated.

i know the oe ks is in the rear of the engine, but there is also a hole threaded in the front of the block too. thats where i had the ks when i used the regal wiring harness when the engine was in my grand prix.

now bill, in your pics, am i looking for the casting numbers that i see on the bellhousing? is that what you are trying to show me? cuz if not, i dont see any thing different between the 2 blocks .

i will check those block castings and use agrazela'* post to help narrow it down.

thanks guys.
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Old 04-08-2008, 05:50 PM   #8
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Wes, I'm just showing you WHERE the markings are.
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Old 04-08-2008, 06:05 PM   #9
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Quote:
Originally Posted by willwren
Wes, I'm just showing you WHERE the markings are.
thats what i thought, just wanted to make sure i wasn't missing anything you were trying to show. i dont have the same eagle eyes that Haro has with pics . that boy is AMAZING with the detail he catches!

but i looked and dont see the numbers im looking for. all i could see were the "3800" casting, and something that said "B233". i will have to wait till i do my sc swap to get a better view.

but when i was out there, it had occurred to me that the original LIM was the walled one. were there any known 92s here that had that?
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Old 04-08-2008, 06:10 PM   #10
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None. About half the 93'*, and everything later are walled.
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