Rotary Shaft Seal CORTECO 12036967 32x52x7 FPM BASLX7 Oil Seal

What is the CORTECO 12036967 Oil Seal?

The CORTECO 12036967 is a premium-quality rotary shaft oil seal manufactured from FPM (FKM fluoroelastomer) and engineered for demanding automotive and industrial applications. Featuring the advanced BASLX7 sealing profile, it incorporates a spring-loaded primary sealing lip together with an additional dust lip, providing excellent protection against oil leakage while preventing dirt, dust and moisture from entering the assembly.

With dimensions of 32 mm x 52 mm x 7 mm, this oil seal is used in selected Mercedes-Benz applications and replaces OE part numbers A0159972846 and 0159972846.

BASLX7 Design and Construction

The BASLX7 profile is an advanced radial shaft seal design developed to improve sealing efficiency and installation performance.

Key construction features include:

• BASLX7 sealing profile
• Premium FPM (FKM) material
• Spring-loaded primary sealing lip
• Integrated dust exclusion lip
• Elastomer-coated outer diameter
• High wear resistance
• Designed for rotating shafts

Compared with the traditional BASL profile, the BASLX7 design incorporates external grooves that improve sealing performance and housing retention while maintaining full compatibility with the original application.

Technical Specification

Manufacturer: CORTECO

Manufacturer Part Number: 12036967

Product Type: Rotary Shaft Oil Seal

Design: BASLX7

Material: FPM (FKM Fluoroelastomer)

Inner Diameter: 32 mm

Outer Diameter: 52 mm

Width: 7 mm

Primary Sealing Lip: Spring-loaded

Dust Lip: Yes

Colour: Brown

OEM References:

• Mercedes-Benz A0159972846
• Mercedes-Benz 0159972846

Trade Number:

• 82036967

Why Choose FPM (FKM)?

FPM (FKM fluoroelastomer) is one of the highest-performance sealing materials used in modern automotive engineering.

Its major advantages include:

• Excellent high-temperature resistance
• Outstanding resistance to engine oils
• Excellent compatibility with transmission fluids
• High resistance to fuels
• Excellent chemical resistance
• Outstanding ageing resistance
• Ozone and UV resistance
• Long service life in demanding environments

These characteristics make FPM seals the preferred choice for modern engines, transmissions and industrial drive systems.

How Does the BASLX7 Oil Seal Work?

The seal operates by maintaining continuous radial contact between the spring-loaded sealing lip and the rotating shaft.

The garter spring applies constant radial force throughout the seal's service life, compensating for normal wear while maintaining effective sealing performance. The additional dust lip protects the sealing area by preventing contaminants from entering the assembly, helping extend both shaft and seal life.

Industrial and Automotive Applications

The CORTECO 12036967 oil seal is designed for applications requiring a 32 × 52 × 7 mm radial shaft seal.

Typical applications include:

• Internal combustion engines
• Gearboxes
• Transmissions
• Industrial pumps
• Drive systems
• Industrial reducers
• Rotating machinery
• OEM automotive applications

Known OEM references:

• Mercedes-Benz A0159972846
• Mercedes-Benz 0159972846

Vehicle compatibility should always be verified using the VIN number or the manufacturer's electronic parts catalogue.

Installation Recommendations

For optimum sealing performance:

• Clean the housing thoroughly before installation.
• Inspect the shaft sealing surface for wear.
• Lubricate the sealing lip before assembly.
• Use an appropriate installation tool.
• Press the seal squarely into the housing.
• Avoid damaging the sealing lip during installation.

Correct installation is essential for achieving maximum seal life.

Common Causes of Oil Seal Failure

Typical causes include:

• Worn shaft surfaces
• Misalignment
• Installation damage
• Dry running
• Excessive temperature
• Chemical incompatibility
• Contamination
• Excessive shaft runout

Preventive inspection of the shaft and housing significantly increases sealing reliability.

Why Engineers Choose CORTECO Oil Seals

• Original Equipment quality
• Premium FPM (FKM) material
• Advanced BASLX7 profile
• Excellent thermal resistance
• Outstanding chemical resistance
• Integrated dust protection
• Long service life
• Trusted by OEM manufacturers worldwide

Frequently Asked Questions (FAQ)

Which Mercedes-Benz part numbers does this oil seal replace?

It corresponds to Mercedes-Benz A0159972846 and 0159972846. Vehicle compatibility should always be confirmed using the VIN number or the manufacturer's parts catalogue.

What is the BASLX7 profile?

BASLX7 is an advanced CORTECO radial shaft seal design featuring a spring-loaded sealing lip, an integrated dust lip and an improved outer profile for enhanced sealing performance.

Why choose FPM instead of NBR?

FPM provides significantly better resistance to high temperatures, synthetic oils, fuels and aggressive chemicals while offering a longer service life.

Does this seal include a garter spring?

Yes. The primary sealing lip is spring-loaded to maintain constant sealing pressure throughout its operating life.

Is this oil seal suitable for high-temperature applications?

Yes. FPM is specifically designed for demanding operating conditions where conventional NBR seals may not provide sufficient durability.