National
Harmonic Bal. Sleeve
$19.94
National
Part # 88186
4.7(47 reviews)Coquille amort vibr
Fits Buick, Pontiac, Oldsmobile & more — 385 vehicle applications
Call for Price
Contact us at 1-866-461-2787 for pricing
available
Contact us at 1-866-461-2787 for pricing
Call for PriceFree ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
Will this fit your vehicle?
Select your vehicle to check fitment.
National 88186 Vehicle Fitment
Fits 385 vehiclesThis Coquille amort vibr fits Buick, Pontiac, Oldsmobile, Stutz vehicles.
1975-1981 Pontiac Grand LeMans
1973-1980 Pontiac Grand Am
1971-1978 Pontiac Grand Safari
1971-1975 Pontiac Grandville
1967-1981 Pontiac Laurentian
1967-1981 Pontiac Firebird
1967-1981 Pontiac Parisienne
1967-1970 Pontiac Executive
1964-1973 Pontiac GTO
1963-1981 Pontiac LeMans
1963-1970 Pontiac Tempest
1962-1981 Pontiac Grand Prix
1960-1977 Pontiac Ventura
1958-1981 Pontiac Bonneville
1958-1981 Pontiac Catalina
1958-1966 Pontiac Star Chief
1958 Pontiac Chieftain
1958 Pontiac Super Chief
National 88186 Specifications
- Grade Type
- Standard Replacement
- Width
- 1.025
- Part Description
- Harmonic Balancer Sleeve
- Shaft Diameter Minimum
- 1.866
- Unit of Dimension
- Inch
- Material
- Stainless Steel
National 88186 Product Description
National 88186 Moteur – Amortisseur de vibrations – Manchon de réparation pour Pontiac Firebird
Key Features
- Designed to prevent timing cover seal leaks
- Made of stainless steel
- Takes up gaps caused by worn-out harmonic balancer shafts
- Elimina los huecos provocados por el desgaste de los ejes armónicos equilibradores
- Hecho con acero inoxidable
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
About National
Shop National Engine Timing Cover Harmonic Balancer Sleeve at Autrex with vehicle fitment details, current pricing, and checkout options for the National 88186. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
4.7out of 5
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering — the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions — National 88186
What vehicles does the National 88186 fit?
The National 88186 fits 28 vehicle applications including 1979-1981 Buick Century, 1979-1981 Buick Regal, 1967-1981 Pontiac Laurentian, 1958-1981 Pontiac Bonneville, 1958-1981 Pontiac Catalina and 23 more. Check the full fitment list above to confirm your vehicle.
What are the shipping options for the National 88186?
Shipping options for the National 88186 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
What is the price of the National 88186?
For current pricing on the National 88186, please call us at 1-866-461-2787. Availability and final order details are confirmed before checkout is completed.
Is the Coquille amort vibr a direct fit replacement?
Yes, the Coquille amort vibr by National is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Coquille amort vibr come with?
The Coquille amort vibr comes with the standard National manufacturer warranty. Please check the product specifications for exact warranty terms.