Re: Can anyone help me decode this block stamping 318
[Re: tt76400]
#1423283
04/21/13 07:56 PM
04/21/13 07:56 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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I Live Here
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Posts: 15,487
Florida
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look on the pass side of engine block date/yr is cast into the block driver side will have the cubic inch cast into the block looking at the front of engine on driver side just below the head gasket is # stamped into the block and will have cubic inch there also. IIRC, 3-318 is a truck engine 
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Re: Can anyone help me decode this block stamping 318
[Re: scratchnfotraction]
#1423285
04/22/13 02:20 PM
04/22/13 02:20 PM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
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The casting date tells when the block was cast not when it was actually assembled . But if it's not an 84 or 85 casting it is most likely not an 85 model year engine. Not that a block could have been set aside for what ever reason and built later.
That said if the 4596 is the assembly date that is Feb 26 1974 ?????
Do these era engine have the Vin pad on the oil pan rail ?
It is a 318 assembled an Mound Rd.
If
Last edited by JohnRR; 04/22/13 02:24 PM.
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Re: Can anyone help me decode this block stamping 318
[Re: JohnRR]
#1423286
04/22/13 03:05 PM
04/22/13 03:05 PM
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Joined: Oct 2010
Posts: 162
Iowa
tt76400
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Iowa
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I'm going to go out and see if I can possibly get to the casting date, never thought of the VIN stamped on the rail, that just has the last numbers of the vin though right? No way to tell year from that or am I mistaken, thanks for your help, I'm going to go out and see if I can get at anything else to help me decode this. Just trying to figure out if it's a roller cam block or not........ 727 is number PK4058332, which I gather is a 1979 truck non lock up, which is odd, cause it sure feels like a lock up trans when I drive it, but the numbers don't lie.. So anyway, I know for sure that the transmission has been swapped at some point. The truck is coded for a 318 2bbl, but now has a 318 with 360 heads, factory spread bore intake, etc. I was just hoping that someone swapped the top end and I still have the roller cam block as I wanted to put a reground early 90's roller cam in it to eliminate the problems with flat tappet failure with todays crappy oils. Don't want to have to put a bottle of zinc in with every oil change if I don't have to. Maybe I'll just look into using a diesel oil that has a good additive package if I can find one that's not $5 a quart!!!!
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Re: Can anyone help me decode this block stamping 318
[Re: tt76400]
#1423287
04/22/13 03:57 PM
04/22/13 03:57 PM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
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U.S.S.A.
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Quote:
I'm going to go out and see if I can possibly get to the casting date, never thought of the VIN stamped on the rail, that just has the last numbers of the vin though right? No way to tell year from that or am I mistaken, thanks for your help, I'm going to go out and see if I can get at anything else to help me decode this. Just trying to figure out if it's a roller cam block or not........ 727 is number PK4058332, which I gather is a 1979 truck non lock up, which is odd, cause it sure feels like a lock up trans when I drive it, but the numbers don't lie.. So anyway, I know for sure that the transmission has been swapped at some point. The truck is coded for a 318 2bbl, but now has a 318 with 360 heads, factory spread bore intake, etc. I was just hoping that someone swapped the top end and I still have the roller cam block as I wanted to put a reground early 90's roller cam in it to eliminate the problems with flat tappet failure with todays crappy oils. Don't want to have to put a bottle of zinc in with every oil change if I don't have to. Maybe I'll just look into using a diesel oil that has a good additive package if I can find one that's not $5 a quart!!!!
The number on the pan rail will be the MODEL YEAR , plant the vehicle was assembled at and the last 6 of the vin.
Oil isn't cheap anymore no matter what you use , not all diesel oils have hi zinc levels , thank the EPA . Use Valvoline VR-1 10 -30 , you can get it at NAPA.
Since many things have been changed if it feels like lockup it could be , the trans case is the same , the front half of the lockup trans could have been swapped in.
I don't know if a 79 lockup 727 is electric control or HYD. like the same vintage 904 ?
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Re: Can anyone help me decode this block stamping 318
[Re: tt76400]
#1423290
04/22/13 04:41 PM
04/22/13 04:41 PM
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Joined: Jan 2003
Posts: 25,885
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
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Posts: 25,885
Rio Linda, CA
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021404596M318
That number is out of the usual sequence; the 6M318 is usually at the front of the number sequence and would be a '76 or '86 or '96 318 built at the Mound Road plant.
The assembly date is in the other numbers but what sequence? The casting date on the side of the block will determine which "6" it is.
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Re: Can anyone help me decode this block stamping 318
[Re: tt76400]
#1423292
04/22/13 08:08 PM
04/22/13 08:08 PM
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Joined: Jan 2003
Posts: 25,885
Rio Linda, CA
John_Kunkel
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Too Many Posts
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Rio Linda, CA
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4323345 is a '85-'89 flat tappet head so the 6M318 engine number is an '86.
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