Sealed Power W369P Engine Piston
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Sealed Power

Sealed Power W369P Engine Piston

Brand Sealed Power W369P
Bore (Inch) 4.1250
Bore (mm) 104.8000
Compression Distance 1.725
Head Illustration 28
Head Type Recessed Head .120 deep x 2.940 dia. - 9.75:1 C.R.
Minimum Clearance 0.0015 @ 2.470 from top of head
Note 1 Standard Size
Note 2 Single Piston
Package Alert Single Piston
Part Material Cast
Pin Diameter (Inch) 0.9806
Pin Diameter (mm) 24.907
Pin Offset (Inch) 0.06
Pin Offset (MM) 1.524
Ring 1 Qty 2
Ring 1 Width 5/64
Ring 2 Qty 1
Ring 2 Width 3/16
Standard Size Standard
Fits Oldsmobile · 48 vehicles

Cast construction. Built for dependable performance in engine rebuilds.

Recessed head. Helps deliver a 9.75:1 compression ratio.

Standard size. A direct-fit piston for standard-bore applications.

Cross-references Edelmann 91631, 961P and 1631 for the same application. See all 16.

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Sealed Power W369P Vintage Engine Piston

Sealed Power W369P is a standard-size cast engine piston for vintage rebuilds that need correct dimensions, stable compression, and period-correct fitment. It is built for classic Oldsmobile applications from 1968-1976, including Oldsmobile 98, Cutlass, Cutlass Supreme, Delta 88, Toronado, and Custom Cruiser engines.

Key Features

  • Standard-size piston with a 4.1250 inch bore and 104.8000 mm bore specification
  • Cast construction for vintage engine rebuild applications
  • Recessed head design with .120 inch depth and 2.940 inch diameter
  • 9.75:1 compression ratio head profile
  • 1.725 inch compression distance for matched rebuild geometry
  • 0.9806 inch pin diameter with 0.06 inch pin offset
  • Three-ring groove layout with 5/64 inch, 5/64 inch, and 3/16 inch widths
  • Minimum clearance listed at 0.0015 at 2.470 from top of head

Detailed Description

The Sealed Power W369P piston is part of the brand’s vintage component coverage for engines more than 35 years old. It uses modern manufacturing controls and certified production processes to support consistent dimensions and long service life in classic engine rebuilds. This piston is a direct-fit choice for Oldsmobile V8 rebuild work where standard bore sizing, recessed head geometry, and the listed compression characteristics must match the original engine specification. The W369P also cross-references Edelmann 91631 for the same application.

Compatible With 1968-1976 Oldsmobile 98, 1971-1976 Oldsmobile Custom Cruiser, 1970-1976 Oldsmobile Cutlass, 1975-1976 Oldsmobile Cutlass Salon, 1971-1976 Oldsmobile Cutlass Supreme, 1968-1976 Oldsmobile Delta 88, and 1968-1976 Oldsmobile Toronado. Searchers looking for an Oldsmobile Cutlass piston, Oldsmobile Delta 88 engine piston, or Oldsmobile Toronado replacement piston will find this part number W369P listed for those vintage applications.

Common Repair Uses

  • Restoring worn or damaged piston assemblies during a classic Oldsmobile engine rebuild
  • Replacing a piston that no longer holds the required compression profile
  • Correcting bore-size mismatch in a standard-size rebuild
  • Addressing ring groove wear that affects sealing and oil control
  • Returning proper compression geometry to vintage 1968-1976 Oldsmobile V8 engines

Installation Notes and Tips

Verify bore size, compression distance, pin diameter, and head profile before assembly. Match the piston to the engine’s required ring groove widths and confirm minimum clearance during machine work and final fitment. Because this is a standard-size single piston, confirm the rebuild plan and cylinder condition before ordering additional components.

Quality Assurance

Sealed Power Vintage components are produced for older engine applications using certified manufacturing controls and materials selected for rebuild durability. The W369P is intended for classic engine restoration work where dimensional accuracy and long-term performance matter.

Related reading

This part fits 48 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1976Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileCutlass Salon7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1976OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileCutlass Salon7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1975OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1974OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1973OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1972OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971OldsmobileCustom Cruiser7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971OldsmobileCutlass Supreme7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1971OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1970Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1970OldsmobileCutlass7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1970OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1970OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1969Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1969OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1969OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1968Oldsmobile987.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1968OldsmobileDelta 887.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
1968OldsmobileToronado7.5LV8N/AHigh Compression; 1 Piston; 3 Ring Piston; 1.725 (in) Compression Distance; 0.120 (in) Deep x 2.940 (in) Diameter Recess; Cast Iron; with 9.75 :1 Compression Ratio; Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in); Sold Individually; Standard
Directly replaces or cross-references 16 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Edelmann — 91631961P16311747P3986664005614005624005634005642241747L3078FP514P514STDP2056AXZ9415Z9415STD