What does '0.030 inch undersize' mean for these bearings?

This means the bearings are designed to fit a crankshaft that has been machined down by 0.030 inches. It's common during engine rebuilds when the original crankshaft journals have wear or damage and need to be ground to a standard undersize.

What is the typical application for this main bearing set?

This set is typically used when rebuilding the bottom end of a Ford 351M, 351W, or 400 V8 engine. It's essential for ensuring the crankshaft is properly supported and lubricated within the engine block.

Do I need to purchase anything else with these main bearings?

When rebuilding an engine, you'll also need to consider new rod bearings, piston rings, gaskets, seals, and fresh engine oil and filter. Always refer to your vehicle's service manual for a complete list of required components and procedures.

Clevite Main Bearing Set MS981A30 - Ford V8 351M/351W/400

Name: Clevite Ford V8 351M-351W-400 1969-98 Main Bearing Set
Brand: Clevite
Price: 53.59 USD
Availability: InStock

Clevite Ford V8 351M-351W-400 1969-98 Main Bearing Set

$53.59

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Clevite Ford V8 Main Bearing Set MS981A30. This set is 0.030 inch undersize, ideal for rebuilding engines with worn crankshaft journals.

Key Features

Fits 1969-1998 Ford 351M, 351W, and 400 V8 engines.
This is a 0.030 inch undersize main bearing set.
Multi-layer bearing material with steel backing for durability.
Designed to maintain proper oil clearance for crankshaft support.
Helps reduce friction and wear in the engine's bottom end.

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Will this fit your vehicle?

Product Details

This Clevite main bearing set is 0.030 inch undersize, meaning it's designed for crankshafts that have been machined down by 0.030 inches during an engine rebuild. These bearings are built for Ford 351M, 351W, and 400 V8 engines produced between 1969 and 1998. When you're rebuilding the bottom end of one of these classic Ford V8s, fresh main bearings are crucial for ensuring proper oil clearance and supporting the crankshaft smoothly.

Clevite uses a multi-layer bearing material with a steel backing for strength and a bronze-alloy overlay to handle the loads. The precise dimensions and material composition help maintain the correct oil film between the crankshaft and the bearing, which is essential for reducing friction and wear. This set is a solid option for anyone looking to restore their engine's health and performance, especially if the original crankshaft journals have been turned down to accommodate standard undersize bearings.

This set fits a wide range of Ford vehicles, including popular models like the Ford Bronco, F-150, and E-series vans from the 70s and 80s. Make sure to check the full fitment list to confirm compatibility with your specific application.