Casting information

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Casting information

Postby Plechtan » January 1st, 2009, 1:20 pm

Here is some information i found on Jeep 4.0 casting numbers, some of this information is contained in other posts, but this is a good overview and spotlights the differences between the castings.


Cylinder Blocks

1987-1990

C/N 8933002665, 53005535
Cast iron block, left side may have three 2" or two 1" cast plugs. Second bolt from pan rail on right side of timing cover is a threaded bolt hole. Oil filter mounting on left side of block is pointing downward.

1991-1995

C/N 53008405
Cast iron block, left side has five 2" cast plugs. Second bolt from pan rail on right side of timing cover is a through hole. Oil filter mounting on left side of block is pointing downward. The upper (block side) bearing-locating tab was moved to the center of the bearing register. Two additional bolt bosses added to block where fuel pump would sit (lower right front) for coil mount

1996-1998

C/N 3010341, 53010449

Cast iron block, left side has five 2" cast plugs. Second bolt from pan rail on right side of timing cover is a through hole, coil mount bosses lower right front. Basically it is the same as the 1991-'95 blocks except for dowel pins in the deck for head and block alignment. Oil filter mounting on left side of block is pointing downward. Uses long main bolts and stud girdle. Has "NVH" on side to denote block strengthened for "noise, vibration and harshness" reductions (no visible differences).

1998


C/N 53020514, 53020515
Cast iron block, oil filter mounting surface is 90° to pan rail of engine instead of pointing downward. Uses long main bolts and stud girdle. Has 1/8? pipe thread oil tap into main oil line in rear of block. Will retro back with filter kit available from Daimler-Chrysler. Has "NVH" on side to denote block strengthened for "noise, vibration and harshness." Grand Cherokee application.

1999-2006

C/N 53010327AB, 53010328AB
Cast iron block, oil filter mounting surface is 90° to pan rail of engine instead of pointing downward. All kinds of configuration and boss changes with long mounting boss protruding off the lower left of block. Uses long main bolts and stud girdle. Camshaft thrust plate block. Has "NVH" on side to denote block strengthened for "noise, vibration and harshness." No coil pack mount bosses, now mounted on cylinder head.
The 327 casting wass used in the wranglers and the 328in the grand cherokee. The 328 seems to have a thicker cylinder wall on the thrust side, generally .3" Good canidate to bore to 4"

1999-2001

C/N 53010449AA
Cast iron block, second bolt from pan rail on right side of timing cover is a through hole. Oil filter mounting on left side of block is pointing downward. Uses long main bolts and stud girdle. Basically the same as 1996-1998 except that it is a camshaft thrust plate block. Has "NVH" on side to denote block strengthened for "noise, vibration and harshness.

Crankshafts

1987-1991

C/N 3003453
This application uses the old style AMC pilot bushing p/n 33004041. Hole for converter hub machined to .550" depth. May also have hub hole depth of .850" using bearing and sleeve assembly p/n 53009180. Caution: this crankshaft can have either .550" or .850" pilot hole. Standard transmission must have .550" pilot hole, can interchange .850" pilot hole crank for automatic transmission. Best information indicates that .550" depth crank has knurled rear seal surface.

1992-1994

C/N 3003453
Cast iron crankshaft that has a .850" rear pilot hole. Caution: this shaft can have either .550" or .850" pilot hole. For standard transmission applications a sleeve and bearing assembly p/n 53009180 is required. The pilot bushing is available separately as p/n 53009181. Can be used for 1987-1991 applications only if the pilot bushing housing bore is drilled out from 1.005" to 1.055". Best information is that .850" depth crank has smooth rear seal surface.

1995

C/N 53020767
Cast iron crankshaft which has a .850" rear pilot hole. This shaft is the forerunner to the 1996-2006 shaft with a shorter casting lug at the outer most edge of the rod throw to clear the stud girdle used 1996 and later. Will interchange for 1992-1994.

1996-2006

C/N 53020767, 53020767
Cast iron crankshaft which has a .850" rear pilot hole. This shaft has a shorter casting lug at the outer most edge of the rod throw to clear the stud girdle used 1996 and later. Will interchange back for 1992-1995.

Camshafts
1987-1995


C/N 8933002893
Cast iron hydraulic lifter camshaft for flat type lifter.

1996-1998

C/N 53020436
Cast iron hydraulic lifter camshaft for flat type lifter. Slightly different grind and used with light pressure springs. This cam will retro back for 1987-1995

1999-2006

C/N 53010397
Cast iron hydraulic lifter camshaft for flat type lifter. This is a thrust plate style camshaft.

Connecting Rods
1987-1995

C/N 205, 2670, 288, 296, 351, 544
Forged connecting rod, Center-to-Center length is 6.127" with a .931" diameter pin. Casting number 544 is the most common number seen.

1996-2001

C/N 691
Forged connecting rod, Center-to-Center length is 6.127" with a .931" diameter pin. It will retro back for 1987-1995.


C/N 548
Forged connecting rod, Center-to-Center length is 6.127? with a .931? diameter pin. It has a slightly different shaped beam but weighs the same as all the other rods. The assumption is that these rods will retro for all applications


1986-1990
Cylinder heads


C/N 2686
Cast iron cylinder head has half circle relief on top of each intake port toward the front of the engine for injector clearance. Has "D" shape exhaust ports that face back to back.

1991-1995

C/N 7120, 33007119
Cast iron cylinder head has a much shallower riser on the front of the intake port than 1987-1990. The exhaust ports are now rectangular shaped with rounded corners.

1996-1999

C/N 0630
Cast iron cylinder head that has two receiver holes on each end of the deck face for block that now uses dowel pins. The intake ports have been changed once again, and there is a new designed rocker cover and gasket that will not retro. This head also uses a lighter pressure valve spring that is beehive shaped.

1999-2006

C/N 0331
Cast iron cylinder head that has two receiver holes on each end of the deck face for the block dowel pins. Once again the intake and exhaust ports have changed and closely resemble 1996-1999. The interior of these ports is very rough almost semi-finished looking. There are now four bolt bosses for the coil pack bracket on the spark plug side of the cylinder head. Early versions of theis head are known to be prone to cracking and allowing coolant into the oil. Thease have smaller exhust ports then the eariler version heads and are not the most desirable head for a performance engine
Peter Lechtanski
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Re: Casting information

Postby dwg86 » January 1st, 2009, 3:02 pm

Good info, but i don't think the connecting rods are forged, I do believe they are cast.
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Re: Casting information

Postby gradon » January 2nd, 2009, 11:04 am

Nice homework.
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