GM Metro/Sprint 1985-1993 Repair Guide

Freeze Plugs

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REMOVAL and INSTALLATION

  1. Remove the negative battery cable.
  2.  
  3. Drain the cooling system.
  4.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Drill a small hole in the leaking freeze plug and allow the coolant to drain.
  2.  
  3. Remove any components that restrict access to the freeze plug.
  4.  
  5. Using a chisel, tap the bottom edge of the freeze plug to cock it in the bore. Remove the plug using pliers.
  6.  
  7. An alternate method is to drill an 1 / 8 " hole in the plug and remove it using a dent puller.
  8.  
  9. Clean the freeze plug hole and using an appropriate driver tool or socket, install the freeze plug into the hole. Coat the freeze plug with sealer before installation.
  10.  
  11. Fill the engine with coolant, install the negative battery cable, start the engine and check for leaks.
  12.  

 
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