What does 'STD' size mean for these bearings?

STD stands for standard size. This means the bearings are designed to fit crankshaft journals that are still within their original factory specifications. If your crankshaft has been machined undersize, you will need a different bearing size.

What happens if I install the wrong size connecting rod bearings?

Installing bearings that are too large will result in insufficient oil clearance, potentially starving the bearing of oil and causing rapid wear. If they are too small, the clearance will be excessive, leading to knocking noises and potential damage to the crankshaft and bearings.

Do these bearings come with new connecting rod bolts?

This set includes only the connecting rod bearings. New connecting rod bolts are typically recommended for engine rebuilds, as they are often torque-to-yield and should not be reused. Please check the product details or purchase separately.

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Trusted Since 1957

Est. 1957

Specifications

Brand: ACL
Part #: 4B1171A-STD

ACL Nissan 4 1952-2187-2389cc 1968-89 Engine Connecting Rod Bearing Set

Name: ACL Nissan 4 1952-2187-2389cc 1968-89 Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-nissan-4-1952-2187-2389cc-1968-89-engine-connecting-rod-bearing-set-t14-630907
Price: 16.52 USD
Availability: BackOrder

$16.52

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1972-1973 Nissan 620 Pickup. ACL connecting rod bearings help ensure proper oil clearance for your engine.

Key Features

Fits 1972-1973 Nissan 620 Pickup.
Standard (STD) size for use on factory-spec crankshaft journals.
Restores proper oil clearance between connecting rods and crankshaft.
Helps prevent engine knocking and further internal damage.
Well-built replacement bearings from ACL.

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About this part

Product Details

ACL has been making engine bearings for a long time, and these are well-built replacements. They are made to the standard (STD) size, meaning they are intended to be used when the crankshaft journals are still within their original factory specifications. If your crankshaft has been previously machined or ground undersize, you would need a different bearing size. These bearings are crucial for maintaining the thin film of oil that separates the metal surfaces, preventing direct contact and wear.

When you're rebuilding or repairing your Nissan 620 Pickup's engine, using the correct size bearings is essential. These are the standard size, so make sure your crankshaft journals are not worn undersize before installing them. If you're unsure about your crankshaft's condition, it's always a good idea to have it measured by a machine shop.