Collection: Engine Parts
OconnorParts.com specializes in hard to find and discontinued OEM auto parts. These parts are new and may have aged, distressed and or open packages, see descriptions.
We are a multi-brand full scale dealership, and we buy and warehouse much more than what is currently offered on this website. If you have a newer vehicle of a brand we sell, we urge you to reach out and inquire. We can also check fitment by VIN#. Please use our contact form and describe your needs. - CONTACT US

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Genuine GM OEM 55565339 ENGINE EXHAUST VALVE | CS13-B-T
Regular price $15.32 USDRegular priceUnit price / per -
New-GM OEM General Motors PISTON 12643173 - No pin, no rings | VM1-02-E
Regular price $35.70 USDRegular priceUnit price / per -
GM Genuine OEM 97212572 Engine Valve Seat | OS4-04-E
Regular price $10.21 USDRegular priceUnit price / per -
Genuine Mack OEM Belt Tensioner Kit *DAYCO*, 21568411 | CS13-B
Regular price $225.00 USDRegular priceUnit price / per -
Secondary Air Injection Pump Check Valve Gasket GM 12591023 | OS7-14
Regular price $7.23 USDRegular priceUnit price / per -
Genuine GM Exhaust Gas Recirculation (EGR) Valve Gasket 12567275 | OS2-11-E
Regular price $9.19 USDRegular priceUnit price / per -
OE GM 9118283 ACDELCO 15-5716 A/C Compressor Relief Valve | OS7-14
Regular price $21.85 USDRegular priceUnit price / per -
GM OEM-Water Pump Seal 12562004 | OS4-04-A
Regular price $6.64 USDRegular priceUnit price / per -
Genuine OEM GM Control Valve 12703758 | OS4-03-D
Regular price $25.53 USDRegular priceUnit price / per -
Meritor / WABCO RKN28510 Valve Relay RG-2 | CS12-C-T
Regular price $65.00 USDRegular priceUnit price / per -
New-GM OEM General Motors PISTON 12643173 - No pin, no rings | VM1-01-A
Regular price $35.70 USDRegular priceUnit price / per -
A/C Expansion Valve Seal Kit OEM ACDelco GM 22743906 | OS4-03-A
Regular price $17.50 USDRegular priceUnit price / per -
Expansion Valve Block Kit 84087992 Genuine OE GM | CS15-D
Regular price $96.65 USDRegular priceUnit price / per -
Genuine GM OEM Steering Gear-Outer Tie Rod Nut 11609282 | OS4-01-B
Regular price $6.13 USDRegular priceUnit price / per
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Air Conditioning & Heating | Alternators & Starters | Batteries & Accessories | Bearings & Seals | Belts | Brakes | Chassis & Steering | CV, Driveshaft & Axle | Engine Cooling | Engine Parts | Engine Sensors & Emissions | Exhaust | Filters | Fuel Delivery | Gaskets | Hardware & Fasteners | Ignition & Tune-Up | Lighting & Electrical | Shocks & Struts | Tire & Wheel | Trailers & Towing | Transmission Parts | Turbocharger | Wipers & Components
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BlueBird Bus Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM BlueBird Bus...
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Caterpillar Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Caterpillar parts...
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Volkswagen Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Volkswagen VW...
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Western Star Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Western Star...
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Hino Truck Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Hino Truck...
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Isuzu Truck Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Isuzu Truck...
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Mack Truck Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Mack Truck...
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Fisher Plow Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Fisherv/ Western...
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Cummins Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Cummins parts...
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Volvo Truck Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Volvo Truck...
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Freightliner Parts
OconnorParts.com stocks hard to find discontinued and aged genuine OEM Freightliner parts...