The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Going w/TBI: where to put O2 sensor bungs?

4x4Poet · 03-08-2005, 01:33 AM

I read somewhere that O2 sensors must be mounted with the sensor end pointing down or above sideways to keep from ruining the sensor early. I think because, if the sensor is mounted pointing up, more exhaust crud will settle on the tip due to gravity. Haven't had a chance to verify this. Maybe muffler shops know this. Or EFI sources, like the one you linked.

03-08-2005, 01:33 AM	#4
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	I read somewhere that O2 sensors must be mounted with the sensor end pointing down or above sideways to keep from ruining the sensor early. I think because, if the sensor is mounted pointing up, more exhaust crud will settle on the tip due to gravity. Haven't had a chance to verify this. Maybe muffler shops know this. Or EFI sources, like the one you linked. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.