An expansion plug designed to save mechanic's time, will save hours of repair time in replacing core hole plugs, by simply tightening, even when starter, generator, distributor, manifold, steering
linkage or air conditioner components interfere.
Slips in easily.
Can be finger-tightened.
Permanently set with open end wrench.
No metal comes in contact with the coolant.
Body of plug is specially compounded neoprene, resistant to heat, antifreeze, and rust inhibitors.
Expands as much as 1/8" to seal tightly against irregularities.