1989 GMC S15 Replacing radiator drain cock

1989 GMC S15
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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DAKINGPIN
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  • 1 POST
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.
Jun 24, 2008 at 6:05 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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MERLIN2021
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  • 17,250 POSTS
if you have to, remove the radiator, and unscrew the remainder of the old one, then install the new one.
Jun 24, 2008 at 6:10 PM
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KHLOW2008
  • CAR REPAIR CONTRIBUTOR
  • 41,814 POSTS
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.
Jun 27, 2008 at 8:03 AM