ACL Nissan VQ35DE 3.5L-V6 0.25 Oversized High Performance Main Bearing Set

ACL 4M2633H-.25 is a main bearing set for the cataloged Nissan VQ20DE, VQ25DE, VQ25DET, VQ30DE engine configurations. .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.

Bearing Configuration

H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.

ACLs 2023 guide lists 4M2633 main bearings for VQ20DE, VQ25DE, VQ30DE, VQ30DET and VQ35DE. The associated rod families differ: 6B2630 for the listed 2.0L/2.5L/3.0L applications with a 48 mm rod tunnel, and 6B2640 for VQ35DE. VQ35HR, VQ37VHR and VR30DDTT instead use 1M2505 graded or 4M2505 main bearings; a shared VQ name does not establish interchangeability.

Engine Application

The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.

Specifications

Quantity and Assembly Checks

Confirm the set contents, bearing positions and any separate thrust components against the complete manufacturer number. The photo is representative of the part family.

Measure shaft journals, housing bores and assembled oil clearance using the engine builders specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.

Frequently Asked Questions

Is the year and model enough to choose this bearing? No. Match 4M2633H-.25 to the exact engine and measured build specification.

What size is this listing? .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.

Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.

Related Engine Parts

For the VQ35DE application, see ACL 6B2640H-.25 rod bearings. This is a separately sold component with its own measured journal clearance; confirm the exact engine code and size before pairing parts.