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Premium 100/6 & 3000 Aluminium Oil Sump - UK cast & CNC LM25 alloy - CapeSport

Big Healey

Part no:

ENG664

Product name:

Premium 100/6 & 3000 Aluminium Oil Sump - UK cast & CNC LM25 alloy - CapeSport

Additional information:

Description:

This Premium CapeSport aluminium oil sump is for Austin Healey 100/6 and 3000 BN4–BJ8 six-cylinder engines. It is UK-cast in LM25 alloy and CNC-machined, with machined sealing faces intended to support reliable gasket contact during installation.

Key Benefits

UK-cast LM25 aluminium with full CNC machining for consistent fit and machined sealing surfaces.
Designed with cast fins as part of the sump casting.
Supplied with the required fitting kit, plus sump plug and fitting instructions.

Fitment and Compatibility

Will this fit my Austin Healey 100/6 or 3000?

Yes. This sump is for six-cylinder Big Healeys BN4 through BJ8.

If the car uses a non-standard engine build or modified oil pick-up arrangement, confirm clearance and pick-up positioning before final tightening.

Will I need to modify anything to fit it?

Yes, the oil pump pick-up requires shortening to suit this sump.

Follow the supplied fitting instructions and confirm the pick-up sits correctly before the sump is fully installed.

What’s Included

Aluminium oil sump (LM25 alloy)
Fitting kit
Sump plug
Fitting instructions

Related gasket set: Oil Sump Gasket Set (BN4-BJ8).

Technical Details

Fitment range: BN4–BJ8 (six-cylinder)
Material: LM25 aluminium alloy
Manufacturing: UK-cast and CNC-machined
Sealing faces: CNC-machined sealing surfaces
Additional provision: drilled and tapped mounting points for a sump baffle (if required)

Installation

This is a mechanical installation. Use the supplied instructions, check oil pump pick-up position after shortening, and confirm gasket alignment across the machined sealing faces. Clean mating surfaces and even tightening are important for consistent sealing.

Why Choose This Part

This page covers the Premium CapeSport aluminium sump for BN4–BJ8. It combines UK casting with full CNC machining and includes the fitting kit, sump plug and instructions, so the key installation requirements are defined from the outset, including the oil pump pick-up shortening step.

Cape Sport Logo

INCLUDES:

FITTING KIT
SUMP PLUG & WASHER
FITTING INSTRUCTIONS

OE part number:

AEC203AL

Application:

BN4 - BJ8

Quantity per vehicle:

Items Per Pack:

???

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Your Price:

£312.50 Exc VAT
£375.00 Inc VAT

Quantity:

Frequently Asked Questions

Do I have to modify the oil pump pick-up to fit it?

Yes. The oil pump pick-up needs shortening to suit this sump. Use the supplied fitting instructions, then confirm the pick-up position and clearance before final tightening.

Does it have provision for a sump baffle?

Yes. It includes drilled and tapped mounting points intended for fitting a sump baffle if required. A baffle is not necessary for every use case, but the mounting provision is there for applications that need it.

Is a sump plug included?

Yes. A sump plug is included. The required fitting kit and fitting instructions are also included, so the installation hardware and guidance are supplied with the sump.

What makes this a “premium” aluminium sump?

It is UK-cast in LM25 alloy and fully CNC-machined. That matters most at the sealing faces and critical mounting surfaces, where consistent machining supports predictable installation with the correct gasket set.

Which gasket set should be used?

Use the BN4–BJ8 oil sump gasket set. The correct related item is ENG666 Oil Sump Gasket Set (BN4-BJ8).

Will this stop oil leaks?

The sealing faces are CNC-machined to support accurate gasket contact. Final sealing still depends on correct gasket choice, clean mating faces, and even tightening during installation.