Crankshaft & Main Bearings

WARNING: This page is about a different car, the 1995 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.

Ensure main bearing oil clearance and crankshaft end play is within specification. See CRANKSHAFT MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS. Replace thrust bearing if end play is not within specification.
If oil clearance exceeds specification, try using a different combination of main bearings. See, in this article, SELECTIVE MAIN & ROD BEARINGS table. Use only bearing combinations listed in table.
CAUTION: DO NOT grind more than .010" (.25 mm) From crankshaft journal surfaces. Further grinding may cause crankshaft failure.

If any bearing cannot be adjusted to standard oil clearance specification, grind crankshaft and use oversize bearings. Oversize main bearings are available in .010" (.25 mm). Tighten main bearing cap bolts to specification.

SELECTIVE MAIN & ROD BEARINGS

Excess Clearance: In. (mm)

Use Upper Bearing: In. (mm)

Use Lower Bearing: In. (mm)

0.0-.0005 (0.0-.013)

.001 (.025)

⁽¹⁾

0.0005-.0010 (.013-.026)

.001 (.025)

0.0010-.0015 (.026-.039)

.002 (.050)

.001 (.025)

0.0015-.0020 (.039-.052)

.002 (.050)

⁽¹⁾	Use standard bearing.

Main bearing caps are marked for location, with No. 1 at front and No. 4 at rear of engine. Triangle on main bearing cap must point toward front of engine.
Apply a 1/8" bead of silicone sealant to parting line between rear main bearing cap and cylinder block before installing. Install main bearing caps with triangle on cap pointing toward crankshaft pulley end of crankshaft.
Tighten bolts finger tight. Pry crankshaft forward, and tighten main bearing cap bolts to specification. See, in this article, TORQUE SPECIFICATIONS . Ensure rear main bearing cap is even with rear of cylinder block.