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ACL OPSB1478HP is a mpn-specific size engine oil pump for the engine application and crankshaft configuration identified by the exact MPN. It is intended for measured engine assembly where journal diameter, housing bore, oil clearance, bearing position, and every MPN suffix are confirmed before installation.
Key Features
- Performance-oriented ACL bearing construction for demanding engine builds.
- Designed for the specified engine location shown by the application and MPN.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| Match the exact MPN, engine code, crankshaft, journal dimensions, housing bore, and required clearance before ordering. | |||
Vehicle fitment is a starting point only. Engine swaps, machining, crankshaft changes, previous repairs, and production variations can change the required bearing or pump configuration.
Specifications
| Brand | ACL |
|---|---|
| Manufacturer Part Number | OPSB1478HP |
| Component | Engine Oil Pump |
| Size / Clearance | MPN-specific size |
| Condition | New |
What's Included
The exact ACL component set and package quantity identified by the product title and MPN. Order the number of packages stated in the title when a listing is sold by pair or partial set.
About ACL
ACL manufactures engine bearings and lubrication components for replacement, performance, and motorsport engine builds. Black Ops Auto Works organizes the catalog by exact MPN, engine application, component position, and size suffix so builders can compare the correct configuration.
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- ACL Honda B20B4/B18C1/B16A2/B20Z2 High Performance Oil Pump
- Shop the complete ACL engine bearing and oil-pump collection
Frequently Asked Questions
What is ACL part OPSB1478HP?
It is the engine oil pump described on this page in the exact mpn-specific size configuration.
Does vehicle fitment alone confirm the correct bearing?
No. Match the exact MPN, engine code, crankshaft version, journal dimensions, and every size or clearance suffix.
What does STD mean?
STD identifies a standard-size configuration. The crankshaft and housing must still be measured before assembly.
What does an HX or clearance suffix mean?
It identifies an MPN-specific clearance configuration. Never substitute it without measured assembly requirements.
Can bearings be installed without measuring oil clearance?
No. A qualified engine builder should measure every journal, housing bore, and assembled oil clearance with calibrated tools.
Are related bearings or thrust washers included?
Only the components and quantity stated for this exact MPN are included. Main, rod, cam, and thrust components may be sold separately.
Is this product new?
Yes. The condition is new unless the product page explicitly states otherwise.
What should I verify before checkout?
Confirm the MPN, engine application, journal size, required clearance, package quantity, coating or series suffix, and all machine-shop measurements.
Installation Instructions
- Confirm ACL part OPSB1478HP, engine code, drive design, pickup, pan, and front-cover configuration before disassembly.
- Inspect the crankshaft drive, pickup tube, screen, seals, passages, and mounting surfaces before installing the pump.
- Prime the pump with the specified assembly lubricant and follow the engine service procedure for seals, fasteners, and torque sequence.
- Verify pickup clearance, oil-pan clearance, and unobstructed oil passages before final assembly.
- Prime the complete lubrication system and confirm oil pressure before allowing the engine to start and run normally.
ACL
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