L48 vs. L82 question
Thread Starter
Instructor
Joined: Jul 2003
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From: Tecumseh, OK USA
L48 vs. L82 question
Is there a difference in the main caps between these two engines? I just pulled the pan on my 78 to look at the rod bearings and it has 4 bolt mains.
I don't think it's the correct engine and as soon as I can get the casting numbers off the block I'll be posting that as a question as well. The engine pad is clean (meaning it looks like the block has been decked). I know someone has been into the engine, but now I'm not sure if it's original or not. The dipstick tube is on the correct side for the model year however. If it's not original it just means no heartburn over dropping a 406 later! 
Thanks
I don't think it's the correct engine and as soon as I can get the casting numbers off the block I'll be posting that as a question as well. The engine pad is clean (meaning it looks like the block has been decked). I know someone has been into the engine, but now I'm not sure if it's original or not. The dipstick tube is on the correct side for the model year however. If it's not original it just means no heartburn over dropping a 406 later! Thanks
Race Director
Joined: Mar 2001
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From: Living in the Hartland
Originally Posted by Chumpzilla
L48's are two bolt mains.... L82's are 4 bolts...
Le Mans Master
Joined: Mar 2002
Posts: 7,456
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From: Coming home from Luckenbach Texas
If an engine assembly plant temporarily ran out of 2-bolt blocks, they'd use 4-bolt blocks instead. So once in a while you'll find a Caprice with 4-bolt mains. The same holds true for the L48 -- once in a while you'll find one that has 4-bolt mains.
Racer
Joined: Mar 2004
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From: Guston KY
I believe that the casting #'s will just tell you what it came with. . .
If the numbers match, then you're good from that perspective.
The L-82's also had larger valves, different cams, and I believe forged pistons. If your's is original, and an L-48, I think you should have a cast iron intake as opposed to an aluminum one that L-82's came with.
If the numbers match, then you're good from that perspective.
The L-82's also had larger valves, different cams, and I believe forged pistons. If your's is original, and an L-48, I think you should have a cast iron intake as opposed to an aluminum one that L-82's came with.
Last edited by 79-L-82; Jul 12, 2004 at 10:00 AM.
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Le Mans Master
Joined: Mar 2002
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From: Coming home from Luckenbach Texas
Yes. There is nothing special about the blocks beyond 2-bolt/4-bolt. It's the stuff that goes into them and on them (heads, pistons, crank, etc.) that make the difference...
Le Mans Master
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From: Tuttle OK
Cruise-In VIII Veteran
Le Mans Master
Joined: Jan 2003
Posts: 6,575
Likes: 1
From: Tuttle OK
Cruise-In VIII Veteran
Originally Posted by 79-L-82
The L-82's also had larger valves, different cams, and I believe forged pistons. If your's is original, and an L-48, I think you should have a cast iron intake as opposed to an aluminum one that L-82's came with.
Thread Starter
Instructor
Joined: Jul 2003
Posts: 153
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From: Tecumseh, OK USA
Boat anchor (intake)
Originally Posted by 79-L-82
If your's is original, and an L-48, I think you should have a cast iron intake as opposed to an aluminum one that L-82's came with.
