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EROC · 02-23-2005, 07:56 AM

Drilling and tapping cast iron can be a real PITA. Your local muffler shop can probably sell you a steel oxygen sensor bung for a couple bucks. Just drill a hole in the pipe just past the manifold and weld the bung to the pipe. If you decide to get a tap most auto parts store sell taps to repair spark plug holes, which I think are 18mm.

02-23-2005, 07:56 AM	#6
EROC Active Member Join Date: Jan 2005 Location: Salem,Virginia Posts: 123	Drilling and tapping cast iron can be a real PITA. Your local muffler shop can probably sell you a steel oxygen sensor bung for a couple bucks. Just drill a hole in the pipe just past the manifold and weld the bung to the pipe. If you decide to get a tap most auto parts store sell taps to repair spark plug holes, which I think are 18mm. __________________ 69 GMC 2500 Camper Special 88 S10 Pickup 04 Impala I ship UPS from 24153