OE Quality
60-Day Returns

Pioneer Cables PE-120-R Engine Expansion Plug Kit
Pioneer Cables PE-120-R Engine Expansion Plug Kit
Pioneer Cables PE-120-R is an engine expansion plug kit for cylinder block service and rebuild work. It is a steel plug set with zinc plating for corrosion resistance, built for applications that call for a durable, OE-style sealing solution.
Key Features
- Engine expansion plug kit for cylinder block components
- Steel construction with fine-grained, cold-rolled material for strength
- Zinc plated finish for added corrosion resistance
- Packaged for rebuild and service use
- Part number PE-120-R for ordering and catalog lookup
Detailed Description
This Pioneer Cables PE-120-R kit is part of the brand’s expansion plug program, which includes steel, brass, stainless steel, and threaded options for engine rebuilding. This specific kit uses steel plugs with a zinc-plated finish, making it a practical choice where a strong, corrosion-resistant block plug is required. It is listed for Cadillac applications including Commercial Chassis, Fleetwood, DeVille, Eldorado, and Seville across the 1968-1984 model years.
For buyers searching for a Cadillac DeVille engine expansion plug kit, Cadillac Fleetwood cylinder block plug replacement, or a PE-120-R steel expansion plug kit for Cadillac Eldorado applications, this part number provides a direct catalog match. PE-120-R is also a useful reference when sourcing engine block freeze plugs for Cadillac Commercial Chassis service work.
Common Uses
- Replacing corroded or leaking cylinder block expansion plugs
- Servicing engine blocks during rebuild or teardown
- Restoring sealing integrity in older Cadillac engines
- Addressing coolant seepage around block plug openings
- Supporting engine maintenance on vintage Cadillac platforms
Installation Notes and Tips
Inspect the block bore before installation and clean away rust, scale, and old sealant. Verify plug size and seating depth against the engine block opening before final assembly. For best results, install using proper driver tools and follow the engine builder’s sealing procedure for the application.
Quality Assurance
Pioneer Cables manufactures expansion plugs in multiple materials for rebuild applications, including steel, brass, stainless steel, and threaded styles. PE-120-R uses steel construction with zinc plating to support long-term service in engine block environments.
This part fits 56 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1984 | Cadillac | Commercial Chassis | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1984 | Cadillac | Fleetwood | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1983 | Cadillac | Commercial Chassis | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1983 | Cadillac | Fleetwood | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1982 | Cadillac | Commercial Chassis | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1982 | Cadillac | Fleetwood | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1981 | Cadillac | Commercial Chassis | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1981 | Cadillac | DeVille | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1981 | Cadillac | Eldorado | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1981 | Cadillac | Fleetwood | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1981 | Cadillac | Seville | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1980 | Cadillac | Commercial Chassis | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1980 | Cadillac | DeVille | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1980 | Cadillac | Eldorado | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1980 | Cadillac | Fleetwood | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1980 | Cadillac | Seville | 6.0L | V8 | N/A | Steel - Poly Bagged |
| 1979 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1979 | Cadillac | DeVille | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1979 | Cadillac | Fleetwood | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1978 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1978 | Cadillac | DeVille | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1978 | Cadillac | Eldorado | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1978 | Cadillac | Fleetwood | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1977 | Cadillac | Commercial Chassis | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1977 | Cadillac | DeVille | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1977 | Cadillac | Eldorado | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1977 | Cadillac | Fleetwood | 7.0L | V8 | N/A | Steel - Poly Bagged |
| 1976 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1976 | Cadillac | DeVille | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1976 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1976 | Cadillac | Fleetwood | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1975 | Cadillac | Commercial Chassis | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1975 | Cadillac | DeVille | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1975 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1975 | Cadillac | Fleetwood | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1974 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1974 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1974 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1973 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1973 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1973 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1972 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1972 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1972 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1971 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1971 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1971 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1970 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1970 | Cadillac | Eldorado | 8.2L | V8 | N/A | Steel - Poly Bagged |
| 1970 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1969 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1969 | Cadillac | Eldorado | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1969 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1968 | Cadillac | DeVille | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1968 | Cadillac | Eldorado | 7.7L | V8 | N/A | Steel - Poly Bagged |
| 1968 | Cadillac | Fleetwood | 7.7L | V8 | N/A | Steel - Poly Bagged |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.