| Application | Specification |
|---|
| Displacement | 153 Cu.In. (2.5L) |
| Bore | 3.3071" (84 mm) |
| Stroke | (1) |
| Compression Ratio | (1) |
| Fuel System | SFI |
| (1) Information not available from manufacturer |
| (1) | Information not available from manufacturer |
| Application | In. (mm) |
|---|
| Crankshaft |
| End Play |
| Standard | .0044-.0122 (.112-.310) |
| Limit | .0149 (.378) |
| Runout (Center Journal) | .0023 (.060) |
| Thrust Bearing |
| Standard | .0984 (2.500) |
| Oversize | .1009 (2.563) |
| Main Bearings |
| Journal Diameter |
| Size Mark "1" | 2.5588-2.5590 (64.994-65.999) |
| Size Mark "2" | 2.5586-2.5588 (64.988-64.994) |
| Size Mark "3" | 2.5583-2.5586 (64.981-64.988) |
| Journal Out-Of-Round | .0004 (.010) |
| Journal Taper | .0004 (.010) |
| Oil Clearance |
| Standard | .0010-.0018 (.025-.046) |
| Limit | .0023 (.058) |
| Bearing Cap Bore Diameter |
| "A" | 2.7559-2.7561 (69.999-70.005) |
| "B" | 2.7561-2.7563 (70.005-70.010) |
| "C" | 2.7563-2.7566 (70.010-70.018) |
| Connecting Rod Bearings |
| Journal Diameter |
| Standard | 1.9678-1.9685 (49.982-49.999) |
| Undersize | 1.9580-1.9586 (49.733-49.748) |
| Journal Out-Of-Round | .0004 (.010) |
| Journal Taper | .0004 (.010) |
| Oil Clearance |
| Standard | .0018-.0025 (.046-.064) |
| Limit | .0031 (.079) |
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS
| Application | In. (mm) |
|---|
| Bore Diameter |
| Pin Bore | .8269-.8272 (21.003-21.011) |
| Maximum Bend | .0020 (.050) |
| Maximum Twist | .0039 (.099) |
| Side Play |
| Standard | .0099-.0157 (.251-.399) |
| Limit | .0177 (.450) |
| Application | In. (mm) |
|---|
| Pistons |
| Clearance | .0008-.0015 (.020-.038) |
| Diameter | 3.3059-3.3067 (83.970-83.990) |
| Pins |
| Diameter | .8266-.8268 (20.996-21.001) |
| Piston Fit | Slip |
| Rod Fit | Slip |
| Rings |
| No. 1 |
| End Gap |
| Standard | .0079-.0137 (.201-.348) |
| Limit | .0276 (.701) |
| Side Clearance | .0012-.0027 (.030-.069) |
| No. 2 |
| End Gap |
| Standard | .0138-.0196 (.351-.498) |
| Limit | .0276 (.701) |
| Side Clearance | .0008-.0023 (.020-.058) |
| No. 3 (Oil) |
| End Gap |
| Standard | .0079-.0275 (.201-.699) |
| Limit | .0709 (1.801) |
| Application | In. (mm) |
|---|
| Cylinder Bore Diamater (1) |
| Size Mark "1" | 3.3075-3.3078 (84.011-84.018) |
| Size Mark "2" | 3.3071-3.3074 (84.000-84.008) |
| Maximum Limit | 3.3090 (84.049) |
| Maximum Taper | .004 (.10) |
| Maximum Out-Of-Round | .004 (.10) |
| Maximum Deck Warpage | .0024 (.061) |
| (1) Cylinder bore diameter determined by number stamped on block head surface. |
| (1) | Cylinder bore diameter determined by number stamped on block head surface. |
| Application | In. (mm) |
|---|
| Intake Valves |
| Face Angle | 45 Degrees |
| Head Thickness |
| Standard | .039 (.99) |
| Limit | .023 (.58) |
| Face Width | .0433-.0512 (1.099-1.300) |
| Stem Diameter | .2348-.2354 (5.964-5.979) |
| Exhaust Valves |
| Face Angle | 45 Degrees |
| Head Thickness |
| Standard | .047 (1.19) |
| Limit | .027 (.69) |
| Face Width | .0433-.0512 (1.099-1.300) |
| Stem Diameter | .2339-.2344 (5.941-5.954) |
| Valve Springs |
| Free Length |
| Inner | 1.4204 (36.078) |
| Limit | 1.3780 (35.001) |
| Outer | 1.5921 (40.439) |
| Limit | 1.5441 (39.220) |
| Out-Of-Square |
| Inner | .063 (1.60) |
| Outer | .070 (1.78) |
| Lbs. @ In. (kg @ mm) |
| Pressure |
| Inner | 15.2-17.4 @ 1.08 (6.9-7.9 @ 27.43) |
| Limit | 13 @ 1.08 (5.9 @ 27.43) |
| Outer | 33.9-39.2 @ 1.25 (15.4-17.8 @ 31.8) |
| Limit | 30 @ 1.25 (13.3 @ 31.8) |
| Application | In. (mm) |
|---|
| Maximum Warpage |
| Head-To-Block | .002 (.05) |
| Manifold-To-Block | .004 (.10) |
| Valve Seats |
| Seat Angle | 45 Degrees |
| Seat Width | .0433-.0512 (1.099-1.300) |
| Valve Guides |
| Valve Guide I.D. | .2362-.2367 (5.999-6.012) |
| Valve Guide Installed Height | .53 (13.5) |
| Valve Stem-To-Guide Oil Clearance |
| Intake Valve |
| Standard | .0008-.0018 (.020-.046) |
| Limit | .0027 (.069) |
| Exhaust Valve |
| Standard | .0018-.0028 (.046-.071) |
| Limit | .0035 (.089) |
| Application | In. (mm) |
|---|
| Bore Diameter | 1.0236-1.0249 (25.999-26.032) |
| Journal Diameter | 1.0210-1.0218 (25.933-25.954) |
| Journal Runout | .0039 (.099) |
| Lobe Height |
| Intake |
| Standard | 1.5530-1.5593 (39.446-39.606) |
| Limit | 1.5512 (39.400) |
| Exhaust |
| Standard | 1.5523-1.5586 (39.428-39.588) |
| Limit | 1.5512 (39.400) |
| Oil Clearance |
| Standard | .0018-.0039 (.046-.099) |
| Limit | .0047 (.119) |
| Application | In. (mm) |
|---|
| Bore Diameter | 1.2205-1.2214 (31.00-31.023) |
| Lifter Diameter | 1.2188-1.2194 (30.958-30.9723) |
| Oil Clearance |
| Standard | .0010-.0025 (.025-.063) |
| Limit | .0059 (.150) |
