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engine numbers
https://slantsix.org/forum/viewtopic.php?t=15112		 Page 2 of 2
Author:  Charrlie_S [ Wed Nov 23, 2005 2:43 pm ]
Post subject: 
It sounds like this is a "reman" engine. Major engine reman shops use the screwed on or riveted tags. If the engine was done by one of these places, most likely they took a cut of the top of the block, and this could remove the factory numbers.
Author:  valiant effort [ Wed Nov 23, 2005 4:11 pm ]
Post subject:  numbers
thanks Charlie..i suspected something like that..too bad..it does have solid lifters so i guess its pre 1980 and it does look like its a rebuild..actually looks pretty good inside except it looks like no one ever changed the oil..
Author:  Charrlie_S [ Thu Nov 24, 2005 6:42 am ]
Post subject: 
The only things you need to be concerned about, as for the year, for parts, is: solid/hydraulic valve train, and cast/forged crank. Everything else will not make any difference in the year. You need to be more concerned with over/under sizes, that were used during the rebuilding process.
Author:  valiant effort [ Thu Nov 24, 2005 9:19 am ]
Post subject:  engine numbers
how can i tell if its cast or forged crank?
Author:  dusty7t4 [ Fri Nov 25, 2005 6:40 am ]
Post subject: 
1975 and earlier used a forged crank, 76 and up is cast

-dave
Author:  SlantSixDan [ Fri Nov 25, 2005 7:07 am ]
Post subject: 
Quote:
1975 and earlier used a forged crank, 76 and up is cast
No, actually, it's more complicated than that. The changeover from forged to cast was in the middle of 1976 production. All 1975 slant-6s have forged cranks, some 1976s have forged, some 1976s have cast, and all 1977-up have cast.

This is for US/Canada/Mexico production; other plants worldwide may well have stayed with forged right through to the end. (Argentina-Slantsixer?)
Author:  relic-lover [ Fri Nov 25, 2005 8:02 am ]
Post subject:  Get a cup of coffee Dan
Quote:
and all 1977-up have forged.
That is just plain wrong -

77 and up would be cast cranks.
Author:  SlantSixDan [ Fri Nov 25, 2005 8:19 am ]
Post subject:  Re: Get a cup of coffee Dan
Quote:
Quote:
and all 1977-up have forged.
That is just plain wrong -

77 and up would be cast cranks.
Whoops, bad things happen when I post before breakfast. :roll: I've fixed it.
Author:  Charrlie_S [ Fri Nov 25, 2005 8:19 am ]
Post subject: 
The problem Valiant Effort is having, is, he doesn't know the year of the engine. I have been looking for my bearing book, so I could post the bearing sizes for the cast/forged crank, but it is misplaced.
The forged crank has a 1, 2, 4, main bearing width, slightly larger then 1 inch. The cast crank has a 1, 2, 4, bearing width less then 1 inch.
Author:  dusty7t4 [ Tue Nov 29, 2005 12:03 pm ]
Post subject: 
Quote:
Quote:
1975 and earlier used a forged crank, 76 and up is cast
No, actually, it's more complicated than that. The changeover from forged to cast was in the middle of 1976 production. All 1975 slant-6s have forged cranks, some 1976s have forged, some 1976s have cast, and all 1977-up have cast.

This is for US/Canada/Mexico production; other plants worldwide may well have stayed with forged right through to the end. (Argentina-Slantsixer?)
yes, that is true, I just go with the "76 up" statement when I am browsing the local yards to avoid getting a cast.

truth be told, I have have never had a crank or bearings fail anyway

-dave
Author:  valiant effort [ Thu Dec 01, 2005 7:28 pm ]
Post subject:  numbers
thanks again charlie..I will measure them and let you know..
Author:  YeahBut [ Fri Dec 02, 2005 1:27 pm ]
Post subject: 
I also have a remafactured engine with a riveted tag on the block right side front just above the oilpan. It is painted black. My truck is a 67, but now the engine--block and/or head could be almost anything. I do have spark plug tubes--they are moist.

Guessing from the posts, I am looking for an earlier block with a forges crank, and a later head with hydralic lifters?
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