Emmisions stuff - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kevinr1970 · 09-07-2005, 01:47 PM

I was looking at my donor '87 lwb with 305 and noticed it doesn't have a smog pump or anything else going to the exhaust manifolds. Seems like a headers would be a breeze here.
I was also looking at my '86 GMC 4x4 with 305 and a friends '87 swb with a 350 and they both have smog pumps that attach to the exhaust manifolds.
I looked as close as I could at my '87 and it didn't look like there was ever a smog pump installed, but who knows 18 years later?
The sticker on my core support says: CATALYST, BPERG/ORC (I think). Does this say there is no smog pump?
Just curious as I don't really want to hassle with the pump if I don't have to.

09-07-2005, 01:47 PM	#1
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Emmisions stuff I was looking at my donor '87 lwb with 305 and noticed it doesn't have a smog pump or anything else going to the exhaust manifolds. Seems like a headers would be a breeze here. I was also looking at my '86 GMC 4x4 with 305 and a friends '87 swb with a 350 and they both have smog pumps that attach to the exhaust manifolds. I looked as close as I could at my '87 and it didn't look like there was ever a smog pump installed, but who knows 18 years later? The sticker on my core support says: CATALYST, BPERG/ORC (I think). Does this say there is no smog pump? Just curious as I don't really want to hassle with the pump if I don't have to. __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)



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