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Location: Fredericksburg, VA | I'm having trouble fixing the year on a Mopar engine I just bought and want to rebuild. Was told it was a early 60s 318. But I can't find anything on the numbers. Can anyone help? Stamped number on LF of block just below the head = LP8 211096. Casting number on RF of block = 1737929. And casting number on intake = 1630944. I'm new to Mopar so hopefully you guys can help me figure it out.
Don
Edited by pittsdriver 2007-01-11 8:13 PM
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Member
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Location: The Netherlands | Don ,
my engine also has the nr:1737929 stamped on the block. I believe I have a 1958 318 engine. But I haven't found the LP8 number on mine yet. So If you DO have this number (lp8211096) I am guessing yours is a 58. The number 1737929 was used for severeal different engines from different years though. This has been somewhere on the forwardlook forum in the past. Try Google and type in 'engine number 1737929' and you'll get multiple hits you can work with. Hopes this helps. 
Sebastiaan58
by the way what size are the head bolts ? 
Edited by sebastiaan58 2007-01-12 3:15 PM
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Location: Fredericksburg, VA | Sebastiaan, thanks for the info. I finally got the headbolts off and they are 1/2" diameter coarse thread and I used a 3/4" socket. I think this engine might be a Mopar marine engine. Still looking. Thanks again.
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Extreme Veteran
Posts: 409
Location: Tampa, Florida | Are you sure that it isn't LP2?
LP2 is the engine designation for a 1958 Plymouth V-8. The following series of numbers is the serial number. |
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Expert
Posts: 1506
 
Location: Colo Spgs | Don
Is the distributor in the front or the back ???
The rear is most likely an 318 and the front could be the heavier 350, 361 and the such.
Uncle Rodger & Aunt Gabby
COS |
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Location: Fredericksburg, VA | It's definitely a LP8 211096 and the distributor is in the rear.
Don |
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Location: Fredericksburg, VA | Guys, I'm 99% positive I have a 1958 318 poly. I've been told it's pre-LA and pre-early"A". This has been a challenge but I've learned a lot. Thanks for all your input.
Don |
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Extreme Veteran
Posts: 331
Location: Northern North Carolina |
I revived an old thread rather than starting a new one, since there are at least 9 existing threads on Identifying a 318 Poly Engine.
I'm the 2nd owner of my 1957 Plymouth Belvedere. Bought it from the son-in-law of the original owner. In 1982 when I bought it, he said he believed everything to be "original". We didn't get into all details, as he was just selling for his family, since the owner had gone into a nursing home, and I already knew I wanted the car, "all-original" or not. Everyone who's ever looked at the car has said "it's definitely a 318"... though I know the line re Only Fury's-had-318's-in-1957. I've never had any real investment in the engine being one thing vs another---- have just repeated what's been told to me by people who worked on the car, and Mopar buffs who've seen it.
When I took the engine in to be rebuilt, I told the shop owner the above information. I said "first thing, make sure it IS a 318! It could be anything. Let me know what's really in there".
He came back with "it's definitely a 318".
Now with all the issues of why this engine won't "run right" after the rebuild (separate thread), here's what's come up, this week:
--Rebuilder says "from everything I've seen in your engine, it's a 318. I haven't seen anything that suggests it's anything other than a 318".
--The raised block numbers are 1737929----- I know that that's a shared code, showing up on various Mopar engines from at least 1957 to 1962.
--The rebuilder says he can't find ANY other numbers anywhere on this engine--- except a partial number on the crank -- "557".
--I told him to check for the stamped # on the driver's side front of block, just under the head deck. He says there's no # there.
Your thoughts?
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Expert
Posts: 3035
Location: N.W. Fla. | 57PlymouthNC - 2008-08-26 4:00 PM
I revived an old thread rather than starting a new one, since there are at least 9 existing threads on Identifying a 318 Poly Engine.
I'm the 2nd owner of my 1957 Plymouth Belvedere. Bought it from the son-in-law of the original owner. In 1982 when I bought it, he said he believed everything to be "original". We didn't get into all details, as he was just selling for his family, since the owner had gone into a nursing home, and I already knew I wanted the car, "all-original" or not. Everyone who's ever looked at the car has said "it's definitely a 318"... though I know the line re Only Fury's-had-318's-in-1957. I've never had any real investment in the engine being one thing vs another---- have just repeated what's been told to me by people who worked on the car, and Mopar buffs who've seen it.
When I took the engine in to be rebuilt, I told the shop owner the above information. I said "first thing, make sure it IS a 318! It could be anything. Let me know what's really in there".
He came back with "it's definitely a 318".
Now with all the issues of why this engine won't "run right" after the rebuild (separate thread), here's what's come up, this week:
--Rebuilder says "from everything I've seen in your engine, it's a 318. I haven't seen anything that suggests it's anything other than a 318".
--The raised block numbers are 1737929----- I know that that's a shared code, showing up on various Mopar engines from at least 1957 to 1962.
--The rebuilder says he can't find ANY other numbers anywhere on this engine--- except a partial number on the crank -- "557".
--I told him to check for the stamped # on the driver's side front of block, just under the head deck. He says there's no # there.
Your thoughts?
1737929 is a 301. 1739429 is 318 |
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Expert
Posts: 3400
Location: Chestertown, NY ( near Lake George) | How about measuring the bore and stroke then matching those specs to what engine fits the measurements? Any machine shop can take those measurements in 3 minutes! The check them against the 301/318 specs., no? |
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Expert
Posts: 4533
Location: Ripon, WI | that could work and might not.... Depends on if it has had a rebore and how bad it is worn.
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Extreme Veteran
Posts: 331
Location: Northern North Carolina |
Update today: Engine rebuilder says "557" partial number found on crank indicates "definitely a 301 crank--- a 301 crank is the only crank made with those numbers". He says "but there were TWO 301 engines made [never heard that before--- is that true?], one with a 3 and a half inch bore, one with a bore of almost 4 inches".
Obviously this is frustrating (if you've seen the "other" thread, on the engine rebuild mess, you know what I mean), since the FIRST thing I said when I took the engine for a rebuild was "first, make sure WHICH engine it is---- I've been told it's a 318, but I need to make SURE. It could be a 301". |
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mopar engine id
