What does 0.25mm oversized mean for these rod bearings?

This means the bearings are slightly larger in diameter than standard size. They are intended for use when the engine's crankshaft journals have been machined down by 0.25mm (approximately 0.010 inches) during an engine rebuild.

Are these bearings suitable for a stock VG30DETT engine?

While these are high-performance bearings, they can be used in a stock rebuild if the crankshaft journals are within the 0.25mm undersize specification. For a standard rebuild without crankshaft machining, you would typically need a standard size bearing.

What is the advantage of a tri-metal overlay?

A tri-metal overlay is a common design in performance bearings that uses multiple layers of different metals. This construction helps the bearing withstand higher loads and temperatures while maintaining a consistent oil film, which is crucial for engine longevity under stress.

ACL High Performance Rod Bearings VG30DETT 6B2390H-.25

Name: ACL Nissan VG30DETT 3.0L-V6 0.25mm Oversized High Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-nissan-vg30dett-3-0l-v6-0-25mm-oversized-high-performance-rod-bearing-se-t14-12967
Price: 61.21 USD
Availability: InStock

ACL Nissan VG30DETT 3.0L-V6 0.25mm Oversized High Performance Rod Bearing Set

$61.21

Only 5 left in stock

ACL High Performance Rod Bearing Set for Nissan VG30DETT 3.0L-V6. 0.25mm oversized for improved clearance.

Key Features

Fits various Infiniti and Nissan models with VG30DETT 3.0L V6 engines.
0.25mm oversized for use with machined crankshaft journals.
Tri-metal overlay construction offers improved load capacity and durability.
Designed to provide consistent oil clearance under high-stress conditions.
High-performance bearings suitable for engine rebuilds and performance applications.

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Will this fit your vehicle?

Product Details

When you're rebuilding or refreshing a Nissan VG30DETT engine, especially one that's going to see harder use, the rod bearings are a critical component to get right. These high-performance rod bearings from ACL are built to handle more stress than stock, making them a solid choice for performance builds or when you need a reliable replacement for a worn-out set. They are specifically sized at 0.25mm oversized, which is important for ensuring proper oil clearance after machining or when using a crankshaft that's been ground undersize.

ACL uses a tri-metal overlay on these bearings, which is a well-known design for its ability to withstand higher loads and temperatures. This construction helps prevent bearing fatigue and maintains a consistent oil film between the crank and rod, even under demanding conditions. The 0.25mm oversize means they are designed to fit crankshaft journals that have been machined down by 0.25mm (or approximately 0.010 inches). This is a common practice during engine rebuilding to ensure a fresh, smooth surface for the bearings to run on.

If you're working on a VG30DETT engine and have had the crankshaft journals measured and machined to be 0.25mm undersize, this set from ACL is what you'll need. Always refer to your engine's specific service manual for proper installation procedures and torque specifications.