Dorman Products

Dorman 550-017 Expansion Plug - Engine Cylinder Head

In stock
SKU: 591|550017
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Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
$15.83
Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.

Product details

  • SKU 591|550017
  • Barcode 19495550174

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Description

Product Description

This engine cylinder head plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

  • Direct replacement - this engine cylinder head plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution - this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction - this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience

Detailed Applications

Year Make Model Configuration Positions Application Notes
1981 Cadillac Commercial Chassis V8 368 6.0L 4 Required
1981 Cadillac DeVille V8 350 5.7L 4 Required
1981 Cadillac DeVille V8 368 6.0L 4 Required
1981 Cadillac Eldorado V8 350 5.7L 4 Required
1981 Cadillac Eldorado V8 368 6.0L 4 Required
1981 Cadillac Fleetwood V8 350 5.7L 4 Required
1981 Cadillac Fleetwood V8 368 6.0L 4 Required
1981 Cadillac Seville V8 350 5.7L 4 Required
1981 Cadillac Seville V8 368 6.0L 4 Required
1980 Cadillac Commercial Chassis V8 368 6.0L 4 Required
1980 Cadillac DeVille V8 350 5.7L 4 Required
1980 Cadillac DeVille V8 368 6.0L 4 Required
1980 Cadillac Eldorado V8 350 5.7L 4 Required
1980 Cadillac Eldorado V8 368 6.0L 4 Required
1980 Cadillac Fleetwood V8 350 5.7L 4 Required
1980 Cadillac Fleetwood V8 368 6.0L 4 Required
1980 Cadillac Seville V8 350 5.7L 4 Required
1980 Cadillac Seville V8 368 6.0L 4 Required
1979 Cadillac Commercial Chassis V8 425 7.0L 4 Required
1979 Cadillac DeVille V8 350 5.7L 4 Required
1979 Cadillac DeVille V8 425 7.0L 4 Required
1979 Cadillac Eldorado V8 350 5.7L 4 Required
1979 Cadillac Fleetwood V8 350 5.7L 4 Required
1979 Cadillac Fleetwood V8 425 7.0L 4 Required
1979 Cadillac Seville V8 350 5.7L 4 Required
1978 Cadillac Commercial Chassis V8 425 7.0L 4 Required
1978 Cadillac DeVille V8 425 7.0L 4 Required
1978 Cadillac Eldorado V8 425 7.0L 4 Required
1978 Cadillac Fleetwood V8 425 7.0L 4 Required
1978 Cadillac Seville V8 350 5.7L 4 Required
1977 Cadillac Commercial Chassis V8 425 7.0L 4 Required
1977 Cadillac DeVille V8 425 7.0L 4 Required
1977 Cadillac Eldorado V8 425 7.0L 4 Required
1977 Cadillac Fleetwood V8 425 7.0L 4 Required
1977 Cadillac Seville V8 350 5.7L 4 Required
1976 Cadillac Calais V8 500 8.2L 4 Required
1976 Cadillac Commercial Chassis V8 500 8.2L 4 Required
1976 Cadillac DeVille V8 500 8.2L 4 Required
1976 Cadillac Eldorado V8 500 8.2L 4 Required
1976 Cadillac Fleetwood V8 500 8.2L 4 Required
1976 Cadillac Seville V8 350 5.7L 4 Required

Product Specifications

Closed End Diameter: 1.255 in
Material: Steel
Open End Diameter (in): 1.255 in
Package Contents: Cup Type Plug
Packaging Type: Box
Package Quantity: 10
Brand: Dorman - AutoGrade - Boxed

OE Numbers

DIRECT OE CROSS
1489745 GENERAL MOTORS