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KIES S55/N55/N54 CRANK SEAL GUARD (E9x/F3x/F30/F80/F82/F83/E92/ETC)
KIES S55/N55/N54 CRANK SEAL GUARD (E9x/F3x/F30/F80/F82/F83/E92/ETC)
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KIES S55/N55/N54 CRANK SEAL GUARD (E9x/F3x/F30/F80/F82/F83/E92/ETC)

Kiesn54n55s55sealguard
$220.00 $199.99

$199.99

KIES S55/N55/N54 CRANK SEAL GUARD (E9x/F3x/F30/F80/F82/F83/E92/ETC)
** Please note, these are precision engineered with tight tolerances, based on factory specs. If you've had your seal replaced due to an engine repair, crank hub upgrade, etc, please ensure that the seal has been properly set. Compatible with all S55, N55, and N54 BMWs
The all-new Kies Crank Seal Guard is an inexpensive insurance policy to protect your very expensive BMW N54, N55, and even S55 from potential catastrophic engine failure! 

On the N54, N55, and S55, the accessory belt sits under some common leak areas in your car’s oil and coolant system. If you experience one of these leaks, what can happen is your accessory belt can start to walk off your crank pulley. Because of the design of the engine, tiny shards of rubber from your fraying belt can easily find their way through your crank seal. If this happens, these little pieces of the belt can get picked up by your timing chain and find their way into your valve cover and cause damage, and/or they can lodge themselves into your oil pickup, starving your engine of oil. Additionally, as we’ve learned from N54 engines, we’ve even seen cases where the belts snap, wrap themselves around your crank pulley and force the entire belt into the engine, through the crank seal! If either of these situations is to occur, you’ll be certainly looking at a costly new engine, which will cost thousands of dollars.

After seeing these devastating engine failures, we went to work to design a bulletproof solution to prevent this from happening! The Kies Crank Seal Guard is a precisely engineered piece of art, which acts to block belts and belt particles from making their way through the crank seal, by reducing the gap between the Kies Crank Seal Guard and the crank hub to just twenty thousandths of an inch, saving your engine! The Kies Crank Seal Guard also features self-centering technology, to ensure a perfect fit every single time.

The Kies Crank Seal Guard is machined out of a single piece of 6061 billet aluminum, to eliminate the chance of any welds snapping, it includes BMW Genuine Bolts and it’s proudly made in the USA! 


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We are typically very quick and have a 24-48 hour turnaround time. Transit time depends on your order and which warehouse we are shipping from, but typical transit times are between 5-7 business days from one side of the US to the other.

Majority of the items we offer do ship free to the lower contiguous 48 states. States that require plane or boat to reach (such as Hawaii, Alaska, Puerto Rico, etc) do NOT qualify for free shipping. Please contact us to inquire about international shipping costs. During checkout, you will know which items ship free and which have shipping costs associated with them. In general, larger/heavier items will have additional shipping costs (body kits, wheels/rims, etc)

Even though everything can be shipped internationally, sometimes the cost is simply just too high and doesn't make sense to do so. We're here to make sure you have a great shopping experience, so if you have a product(s) you want to inquire about, please contact us at info@kiesmotorsports.com

Yes, we do price match reputable competitors in the marketplace. If you find a product cheaper elsewhere, please email us the (1) link of the product from our website and (2) the link to the competitor site. We will make an assessment on our end if we are able to price match or not and respond to you via email.

Typically you have 14 days to return a product you purchase when you change your mind. Damaged and improperly installed products are NOT eligible for returns. Shipping fees may be assessed and not refunded based on criteria as well as restocking fees. Please see our FAQ page for more details.

Unfortunate Kies Motorsports no longer does customer installs (with the exception of crank hubs - we still do thos inhouse). Our HQ is solely reserved for filming, office space, and shipping/receiving.

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