Dorman 555-045 rear expansion plug for the 1963-1973 Chevrolet Impala and other vehicles is a steel cup that seals a casting opening in the engine. This Dorman expansion plug, also called an engine expansion plug, is sold as one plug.
- Part of the Dorman Autograde line
- Cup-type body made of steel
- Nominal size of 2-1/64 in.
- Height of 0.650 in.
Quick facts
- Part: Dorman 555-045 expansion plug
- Also called: engine expansion plug
- Fits: 1963-1973 Chevrolet Impala and other vehicles
- Position: Rear
- Material: Steel
- Condition: New
A wet or seeping spot around the plug, rust staining, or a plug that looks loose can mean it has failed. Before you replace the plug, rule out a nearby gasket, seal or fitting as the source of the leak.
Fits
This Dorman 555-045 is a cup-type steel expansion plug for the 1963-1973 Chevrolet Impala, the 1975 Chevrolet Malibu and the 1963-1966 Chevrolet Suburban, among others. A 1975 Chevrolet Malibu takes one. If your car is not named here, open the "Vehicles it fits" section to check your exact model, year and engine.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 1
- Nominal size: 2-1/64 in.
- Diameter range: 2.003 to 2.021 in.
- Height: 0.650 in.
Build and materials
- Type: Cup type
- Material: Steel
- Condition: New
- Country of origin: China
In the box
One expansion plug.
Interchange: EPC69-25 · EPS-69
3789860 · 555695
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
3789860, 555695, EPC69-25, EPS-69
Frequently Asked Questions
Does the Dorman 555-045 expansion plug fit a 1975 Chevrolet Malibu?
Yes, Dorman 555-045 fits the 1975 Chevrolet Malibu. For another model, open the "Vehicles it fits" section and look up your year and engine.
What is the Dorman Autograde expansion plug made of, and what size is it?
Dorman 555-045 is a steel cup-type plug with a 2-1/64 in. nominal size, a measured diameter of 2.003 to 2.021 in. and a height of 0.650 in.
Is Dorman 555-045 one of the Dorman freeze plugs?
Yes, shoppers often search core plugs as freeze plugs. This listing is one cup-type steel expansion plug, Dorman 555-045.
How do I spot a failing rear expansion plug?
With the engine off and cool, look for a wet or seeping spot, rust staining or a plug that looks loose in its opening. A shop can trace the source of a leak if it is not obvious.
Does Dorman 555-045 replace EPC69-25?
Yes, EPC69-25 is listed as an interchange number for Dorman 555-045.
