Mechanics

REPLACING RADIATOR DRAIN COCK

1989 GMC S15

Engine Cooling problem
1989 GMC S15 6 cyl Two Wheel Drive Automatic 200000 miles

The plastic drain petcock broke off while flushing the radiator. How do you remove the rest of the old drain petcock so I can install the new one.
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Dakingpin
June 24, 2008.




If you have to, remove the radiator, and unscrew the remainder of the old one, then install the new one.

Merlin2021
Jun 24, 2008.
Hi Dakingpin,

The wing nut is made of plastic so use a sharp pointed object to stick into the edge and slowly try to unscrew it off, provided space is available, if not you have to remove the radiator first.
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KHLow2008
Jun 27, 2008.

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