Piston Pin Replacement
Measure piston pin and bore in piston. If clearance is in excess of.001", replace piston and pin. Use suitable tool set and arbor press (see illustration) to press pin in and out of rod. Check freedom of piston on pin after pressing operation.
Courtesy of GENERAL MOTORS COMPANY CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
| Engine |
MAIN BEARINGS |
CONNECTING ROD BEARINGS |
| Journal Diam. |
Clearance |
Thrust Bearing |
Crankshaft Endplay |
Journal Diam. |
Clearance |
Sideplay |
| 1965 |
|
|
|
|
|
|
|
| 283" |
2.300" |
.0003-.0029" |
No. 5 |
.002-.006" |
1.9995" |
.0007.0027" |
.009-.013" |
| 327" |
2.300" |
.0008-.0034" |
No. 5 |
.002-.006" |
1.9995" |
.0007.0028" |
.009-.013" |
| 1966 |
|
|
|
|
|
|
|
| 283" |
2.2990" 2.2983" |
.0003.0029" .001-.0036" |
No. 5 |
.003-.011" |
1.9995" |
.0007-.0027" |
.009-.013" |
| 327" |
2.2990" 2.2983" |
.0003-.0034" .001-.0036" |
No. 5 |
.003-.011" |
1.9995" |
.0007.0028" |
.009-.013" |
| 1967 |
|
|
|
|
|
|
|
| 283", 327" |
2.2989" 2.2983" |
.0008-.0022" .0015-.0031" |
No. 5 |
.002-.006" |
1.9995" |
.0007-.0028" |
.009-.013" |
| 302" |
2.3004" 2.3009" |
.0008-.0022".0015-.0031" |
No. 5 |
.002-.006" |
1.9995" |
.0007.0028" |
.009-.013" |
| 350" |
2.4488" 2.4483" |
.0008-.002" .0008-.0034" |
No. 5 |
.003-.011" |
1.9995" |
.0007.0028" |
.009.013" |
| 1968 |
|
|
|
|
|
|
|
| 302" |
2.2989" |
.0008-.003" |
No. 5 |
.003-.011" |
1.9995" |
.0007.0028" |
.009-.013" |
| 307", 327" |
2.4489" 2.479" |
.0008-.002" .0018-.0034" |
No. 5 |
.003-.011" |
2.0995" |
.0007.0027" |
.009-.013" |
| 350" |
2.4488" 2.4483" |
.0008-.002" .0018-.0034" |
No. 5 |
.003-.011" |
2.000" |
.0007-.0028" |
.009-.013" |
| 1969 |
|
|
|
|
|
|
|
| 302" |
2.4483" |
.0008.003" |
No. 5 |
.003-.011" |
2.0995" |
.0007-.0028" |
.009-.013" |
| 307", 327" |
2.4483" |
.0008-.002" .0018-.0034" |
No. 5 |
.003-.011" |
2.0995" |
.0007-0027" |
.009-.013" |
| 350" |
2.4488" 2.4483" |
.0008-.002" .0018-.0034" |
No. 5 |
.003-.011" |
2.000" |
.0007.0028" |
.009-.013" |
| 1970 |
|
|
|
|
|
|
|
| 307", 350" |
2.4489" 2.4483" |
.0003-.0015" .0006-.0018" .0008-.0023" |
No. 5 |
.002-.006" |
2.0995" |
.0007-.0028" |
.008-.014" |
| 400" |
2.6503" 2.6506" 2.6509" |
.0008-.0O2" .0006-.0018" .0017-.0023" |
No. 5 |
.002-.006" |
2.0995" |
.0009.003" |
.008.014" |
| 1971 |
|
|
|
|
|
|
|
| 307", 350" |
2.4489" 2.4486" 2.4484" |
.0014" .0017" .0023" |
No. 5 |
.002.006" |
2.0995" |
.0013.0035" |
.008-.014" |
| 350" (330 HP) Auto. Trans. |
2.7480" 2.7486" 2.7478" |
.0025" .0019" .0028" |
No. 5 |
.002-.006" |
2.0995" |
.0013.0035" |
.008-.014" |
| 350" (330 HP) Man. Trans. |
2.7486" 2.7478" |
.0019" .0028" |
No. 5 |
.002.006" |
2.0995" |
.0013.0035" |
.008-.014" |
| 1972 |
|
|
|
|
|
|
|
| 307", 350" |
2.4489" 2.4486" 2.4484" |
.0014" .0017" .0023" |
No. 5 |
.002.006" |
2.0995" |
.0013-.0035" |
.008-.014" |
| 350" (255 HP) Auto. Trans. |
2.4489" 2.4486" 2.4484" |
.0025" .0019" .0028" |
No. 5 |
.002-.006" |
2.0995" |
.0013-.0035" |
.008-.014" |
| 350" (255 HP) Man. Trans. |
2.4489" 2.4486" .2.4484" |
.0019" .0028" |
No. 5 |
.002.006" |
2.0995" |
.0013-.0035" |
.008-.014" |
| 1973 |
|
|
|
|
|
|
|
| 307", 350" |
2.4489" 2.4486" 2.4484" |
.0014" .0017" .0023" |
No. 5 |
.002.006" |
2.0995" |
.0013-.0035" |
.008-.014" |
| 350" (245 & 250 HP) Auto. Trans. |
2.4489" 2.4486" 2.4484" |
.0025" .0019" .0028" |
No. 5 |
.002.006" |
2.0995" |
.0013-.0035" |
.008.014" |
| 350" (245 & 250 HP) Man. Trans. |
2.4489" 2.4486" 2.4484" |
.0019" .0028" |
No. 5 |
.002-.006" |
2.0995" |
.0013.0035" |
.008-.014" |
| 1971-73 |
|
|
|
|
|
|
|
| 400" |
2.6489" 2.6484" |
.0014" .0017" .0023" |
No. 5 |
.002-.006" |
2.0995" |
.0013-.0035" |
.008-.014" |