BMW Drive Belts & V-Belts

Turner Motorsport Crank Seal Guard with ECS Kevlar-Reinforced Belt

Protect your S55 from catastrophic failure with this must-have upgrade!

The Turner Motorsport Crank Seal Guard is meticulously designed to safeguard your engine’s crank seal from potential damage caused by a shredded serpentine belt. Oil or coolant leaks can lead to accessory belt slippage, fraying, and tearing, which can send belt debris behind the harmonic balancer and into the crank seal, risking serious engine damage.

Key Benefits:

Shields crank seal from accessory belt debris, preventing engine failure Custom fit for S55 engines Zinc-coated fasteners for superior corrosion resistance Durable 6061 billet aluminum construction, with Turner blue anodized finish for added strength and style Cutting-Edge Design:

Designed using FARO laser scanning and Solidworks CAD for precision fitment Rigorous testing ensures reliable protection in all conditions Easily installs with 2 securing bolts torqued to 20Nm FREE ECS Performance Kevlar-Reinforced Accessory Belt: Receive a FREE ECS Performance Kevlar-Reinforced Accessory Belt with your purchase of the crank seal guard. This premium belt, designed for BMW S55 engines, offers:

Reduced elongation for consistent performance over time Enhanced shock and impact resistance Superior oil and temperature resistance tested to JASO E 109-94 and SAE J2432 standards Ensure long-term engine health and peace of mind with the Turner Motorsport Crank Seal Guard and ECS Kevlar-Reinforced Accessory Belt combo. Prevent the "when, not if" risk of belt-related engine failure today!

This limited-time Doorbusters package is a must-have for any F87 M2 Competition or M2 CS owners! Featuring the Turner Motorsport Skid Plate & S55 Crank Seal Guard, this package helps prevent two major known issues found on the F87 M2 with the S55 engine.

TURNER MOTORSPORT SKID PLATE - WRINKLE BLACK POWDERCOATED FINISH - F87 M2 COMPETITION & M2 CS S55

Since the F87 M2 Competition & M2 CS was designed to make impressive power in stock form (and loads more with upgrades) these cars feature some heavy-duty cooling hardware. In order to keep oil temperatures down (something many late model M cars have struggled with) requires a large oil cooler. BMW engineers positioned the oil cooler quite low under the car, positioned horizontally - an aerodynamic design that creates a vacuum force while driving, drawing heat from the oil cooler. The issue some of the vehicle owners have experienced is road debris from small branches to chunks of ice that have impacted the OE belly pan hard enough to crack the oil cooler draining the car's oil rapidly. Being one of the lowest points of the car, even a close encounter with a parking block can mean the end of the road for the factory belly pan - and oil cooler. Damage to the belly pan means reduced cooling, which can result in dangerously high engine temperatures. Once the belly pan is damaged, there is no longer any protection for the oil cooler, meaning damage to the cooler and a catastrophic loss in oil pressure may be right around the corner.

Designed using 8 gauge 5052 aluminum, this skid plate offers plenty of strength to protect your oil cooler. We also made sure this would be an easy, reversible upgrade by maintaining OE mounting locations and hardware that requires NO cutting or modification to your vehicle for fitment. Our engineering team also felt it was important to maintain some of the cooling features the BMW engineers spec'd out such as having a trim seal to fit snugly against the cooler edges to create the same vacuum cooling effects as stock.

Features:

• No cutting, drilling, or modification required
• 1/8” 5052 Aluminum skid plate construction.
• 10 Ga 5052 Aluminum side pieces to save weight. 
• Increased ground clearance. 
• Integrated frame-mounted support bracket for maximum strength.
• Included bulb seal maintains oil cooler efficiency. 
• Retains factory air duct for oil cooler. 
• Maintains wheel liner mounting positions.
• Black powder-coated or Mill finish (T#:637536) options.

TURNER MOTORSPORT CRANK SEAL GUARD - N52/N54/N55/S55

Introducing our Turner Motorsport Crank Seal Guard – the essential shield for your BMW's engine integrity. Safeguarding the heart of your vehicle, this meticulously designed guard offers robust protection for the crank seal concealed behind the harmonic balancer.

Considered an indispensable maintenance component for your BMW, the Crank Seal Guard acts as a crucial defense against a potential and preventable catastrophe involving your accessory belt. Facing the reality of potential oil or coolant leaks in your engine, this guard becomes a reliable barrier, preventing these fluids from reaching the accessory belt. The consequence of a compromised belt includes walking, slipping, fraying, and rubber particles finding their way behind the harmonic balancer and into the crank seal – a scenario that can lead to severe engine failure.

Let's be honest, engine leaks are a common occurrence, and whether your engine is currently leaking or not, the Crank Seal Guard is a proactive measure against future threats. The wear and tear on the accessory belt due to oil and coolant exposure can result in slipping, tearing, or, worst-case scenario, belt snapping – posing a significant risk to your engine's well-being.

Prepare your car for the long haul and protect the vital components, It's not a matter of "if" but "when" your belt will become a problem, and our Crank Seal Guard is your proactive solution. Rigorously tested on N52/N54/N55 and S55 for 100% confirmed fitment, it stands as a reliable guardian for your engine's health. Invest in the protection your BMW deserves with the Turner Motorsport Crank Seal Guard.

Key benefits: 

• Protect crank seal from rogue accessory belts and their shredded debris
• Optimized to fit N52, N54, N55, and S55 engines
• Rigid design that fits within the space constraints between the engine block and harmonic balancer
• Zinc-coated fasteners for corrosion and oxidation resistance

Design:

• Modeled and designed from FARO laser scanning and Solidworks CAD
• Manufactured from 6061 billet aluminum 
• Turner blue anodizing

Installation:

It is a good idea to note how your belt is routed before starting the installation.

2 securing bolts for crank seal guard - Torque value of 20Nm

You will find either 6 or 8 E10 bolts are holding the harmonic balancer depending on the engine.

E10 (P#11237564511) 
N52: 6 bolts - Torque value of 25nm
N54: 6 bolts - Torque value of 35nm
N55: 8 bolts - Torque value of 35nm

E10 (P#11237575488)
S55: 8 Bolts - Torque value of 35nm

Click HERE for installation instructions:

Product Development:
Our crank seal guard was designed, engineered, tested and quality inspected by our Research and Development team at Turner. Nothing but the highest level of precision and quality through leading-edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer and rigorous long term product testing.