See Figures 1 and 2
For the vehicles covered by this information, one of two types of freeze plugs may be used: a cup-type plug or an expansion-type plug. They are removed in the same way, however two different kinds of tools are used to install them.
REMOVAL & INSTALLATION
- Disconnect the negative battery cable. Drain the cooling system.
- Remove the necessary components to gain access to the freeze plug.
- As required, raise and support the vehicle safely.
- Drill a 1 / 2 in. (12.7mm) hole in the center of the plug, then remove the plug using a Universal Impact Slide Hammer T59L-100-B or equivalent. Inspect the plug bore for damage that might interfere with the proper sealing of the plug. If the bore is damaged, you will have to bore the surface to accommodate the next specified oversize plug.
Oversize plugs are identified by the "OS'' stamped in the flat on the cup side of the plug.To install:
- Lightly coat the plug and/or bore with an oil resistant Stud and Bearing Mount E0AZ-19554-BA or Threadlock 262 E2FZ-19554-B or equivalent.
- Cup type core plugs are installed with the flanged edge outward. The maximum diameter of this plug is located at the outer edge of the flange. The flange on cup type plugs flares outward with the largest diameter at the outer sealing edge.
- Expansion type core plugs are installed with the flanged edge inward. The maximum diameter of this plug is located at the base of the flange with the flange flaring inward.
- For the cup-type plug, it is important to push or drive the plug into the machined bore by using the proper tool. Never drive the plug using a tool that contacts the crowned part of the plug. Damage to the plug and/or plug bore may result. When installed, the trailing (maximum) diameter must be below the the chamfered edge of the bore to effectively seal the plugged bore.
- For the expansion-type plug, it is important to pull the plug into the machined bore by using a properly designed tool. Never drive the plug into the bore using a tool that contacts the flange. Leakage and/or plug blowout will result. the flanged (trailing) edge must be below the chamfered edge of the bore to effectively seal the plugged bore.
- Install all the removed components. Lower the vehicle, as required.
- Fill the cooling system and check for leaks.