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Perfect Circle JV638 Rear Main Bearing Seal Set AMC V8 290 304 343 360 390 401

Part of: Perfect Circle Main Set

Other options in this family: Perfect Circle JV1657 Perfect Circle JV1690 Perfect Circle JV1720

Manufacturer

Picture for manufacturer Perfect Circle

Part Number

JV638
5 reviews
Sale Price

$12.42

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Perfect Circle JV638 is a two-piece rubber rear main bearing seal set designed as a direct-fit replacement for AMC and Jeep V8 engines spanning the 1966–1991 model years. This seal prevents crankshaft oil leaks at the rear of the engine block, helping maintain proper oil pressure and a clean engine bay.

Key Features:

  • Two-piece rubber construction for straightforward installation without engine removal
  • Direct-fit replacement for AMC/Jeep V8 engines displacing 290, 304, 343, 360, 390, and 401 cubic inches
  • Meets or exceeds original equipment specifications for reliable, long-lasting sealing performance
  • Compatible with a wide range of AMC and Jeep platforms from 1966 through 1991
  • Cross-references with OEM and aftermarket part numbers including: AMC 3180468, 3180469, 3194879, 3194880, 3206691; Jeep J3206691; Muskegon RM638; Corteco 17021; Detroit Gasket 17021; Victor Reinz JV638

Installation involves removing the oil pan and rear main bearing cap to access the old seals. The upper half slides into place around the crankshaft while the lower half seats in the bearing cap. Applying an oil-soluble grease to the seal lip prior to installation is recommended to ensure proper seating and prevent premature wear.

Great service and fast delivery service. Ill order from again. Thanks

Great overall experience and fast shipping. Thank you.

Easy to locate parts needed, just had issue finding mounting hardware.

Bought wheels for a trailer, they arrived in a timely manner. The product picture was a little misleading but overall happy with the purchase.

Ordered 8 11R24.5 tires... Price was good and they shipped out in a day or two. Did not receive in 2 days as promised but that was Fed X's fault not THMotorsports. Would buy from again...

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