FullSpecDiesel
Shop / Engine / MAHLE Rear Main Engine Crankshaft Seal 01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML
MAHLE  Rear Main Engine Crankshaft Seal 01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML
MAHLE

MAHLE Rear Main Engine Crankshaft Seal 01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML

MPN: MAH-JV1691

Are you dealing with a leak around your crankshaft? The MAHLE is designed to deliver dependable, OE-quality sealing performance in applications where precision fit and long-term durability matter. When gaskets wear out,…

Daily Driver
$43.22
Ships From Supplier · Ships in 37 business days
Supplier availability is confirmed before your card is charged
Shipping calculated at checkout
Fitment sensitive
Select your truck to continue

This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.

1

Select your truck to continue

Shipping calculated at checkout

Ships directly from the supplier. The final shipping cost will be shown before payment.

  • Ships from MAHLE
Need help confirming fitment?
Ships directly from our trusted supplier network.
Warranty
Warranty Information Pending

Warranty information has not yet been provided for this product. Contact FullSpecDiesel for help locating the applicable manufacturer or supplier warranty.

View complete warranty

Are you dealing with a leak around your crankshaft? The MAHLE is designed to deliver dependable, OE-quality sealing performance in applications where precision fit and long-term durability matter. When gaskets wear out, become brittle, or are reused during maintenance, even small imperfections can lead to leaks, reduced efficiency, and potential component damage. The JV1691 solves that problem by restoring a proper factory-style seal, helping ensure everything stays tightly secured and operating as intended. Whether you're completing routine maintenance or replacing worn components, this gasket provides the confidence of a direct-fit solution engineered for consistent performance and dependable protection. The MAHLE JV1691 is manufactured to meet strict OEM standards, ensuring accurate dimensions and reliable sealing under demanding operating conditions. It is built from high-quality, heat-resistant materials designed to withstand temperature fluctuations, vibration, and exposure to automotive fluids without cracking, shrinking, or degrading over time. Precision production processes help guarantee consistent thickness and uniform surface contact, promoting proper sealing pressure once installed.

Product conditions

Professional installation is recommended.

Return eligibility
Returnable within 30 days of confirmed delivery, in original condition, with an approved RMA
Return window
30 days from confirmed delivery
Restocking fee
No restocking fee
Return shipping
Customer pays return shipping on voluntary returns
Made to order
No
Backorder status
Not backordered
Cancellation
Cancellation is only possible before the supplier order is submitted
Warranty provider
Warranty Information Pending
Warranty duration
Pending verification
Compatibility
Listed for specific vehicle configurations
Legal use
Street legal
Processing estimate
3–7 business days supplier processing
Shipping
Shipping calculated at checkout
Signature
No signature requirement
Supplier
MAHLE

Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.