|
|
Elite Veteran
Posts: 1102
 
Location: Hayward, Calif | Hey Guys, Can anyone decode these LA 318 ID #'s Casting # is 4006730 - 318 - 7 Serial # 5M318 - 12181919 If you could tell me what year eng it is and an added bonas of what it came out of would be great. Thanks, Jerry |
|
| |
|
Elite Veteran
Posts: 1102
Location: Hayward, Calif | OK Guys, where can I find this info ??? I spent an 1 1/2 hrs on this dumb *ss computer , googled Chrys eng id #'s and came up with a lot of useless info. Anyone know where I can go to get this info ? thanks, Jerry |
|
| |
|
Expert
Posts: 3776
  
Location: NorCal | 4006730 - 318 - 7
4006730 is the common casting number for the '75-'79 318. The -7 is a foundry index number for the casting mold.
5M318 - 12181919
5= 1975
M= Marysville engine plant
318= Displacement
1218= Casting date but this decodes to November 27, 1964. Check it again.
1919= Sequence number, the 1919th built that day. |
|
| |
|
Elite Veteran
Posts: 1102
Location: Hayward, Calif | I rechecked that serial # with a bright lite and a magnifying glass and still come up with 12181919. I'm guessing this eng. could have been put in almost anything Chry built in 1975. At least now I have an idea of what I'm working with. Thanks for the info, appreciate it !! BTW, will the 360 heads & intake manifold work on that 318 ? Thanks Again, Jerry |
|
| |
|
Expert
Posts: 1819
Location: Vancouver, BC | 59 in Calif - 2018-01-17 10:02 PM
Hey Guys, Can anyone decode these LA 318 ID #'s Casting # is 4006730 - 318 - 7 Serial # 5M318 - 12181919 If you could tell me what year eng it is and an added bonas of what it came out of would be great. Thanks, Jerry
5M318 - 12181919 - This was stamped on the block just below the head on the front of the left side of the block? It's usually blocked off by the power steering.
5M318 - 12181919
5 - 1975 model year. (Engineering department code was "L")
M - Engine Plant - Mound Road (This plant built A and LA engines for years)
318 - Engine size - 318
1218 - Date engine assembled - 12 - December, 18 - 18th day (December 18, 1974) Chrysler apparently did not use the 10,000 day calendar for the 1975 model year.
1919 - 1,919th engine built on 1218.
If you want to know what assembly plant the engine was shipped to and what car line it was installed in, there should be an eight digit number stamped on the right side of the block just to the rear of the engine mount. Should begin with "5".
I know 360 intake manifolds will work on a 318, not sure about the heads.
Edited by Chrycoman 2018-01-19 5:36 AM
|
|
| |
|
Expert
Posts: 1231
Location: York County, PA | Get the book, "Small Block 'A' Engines", by L. S. Shepard published by Mopar Performance Parts, P/N P4876826. Tells you everything you want to know. As far as 360 heads go, there are multiple types. All will bolt up, a few will improve performance, most will just burn more fuel. Same is true for the intake. |
|
| |
|
Expert 5K+
Posts: 9663
Location: So. Cal | You should check the combustion chamber sizes on those heads. Compression ratio on those '70-'80's motors is the biggest problem. I have a set of rebuilt "302" casting swirl port heads for a 318 if you are interested. You would probably need to pick them up near Los Angeles though because shipping wouldn't be worth doing. |
|
| |
|
Expert
Posts: 1740
Location: Alaska | The 360 heads have larger ports and valves than the 318, also a larger combustion chamber. You can bolt the 360 manifold onto the 318 but you will have a mismatch in the ports although it will seal and run. (I have done this) You can bolt the 360 heads and manifolds onto the 318 and get better flow because of the larger ports and valves but you will lower the compression ratio unless you change pistons and these will have to be aftermarket to raise compression. Hope this is clear. |
|
| |
LA 318
