1969 307 2 bbl Rochester - The 1947 - Present Chevrolet & GMC Truck Message Board Network

697498chevy · 01-23-2010, 04:14 PM

Wonder if y'all have rebuilt one lately ? Sent my off almost a year ago . Came back twice and ran for bit until accel pump came apart . Builder says he can't find a good pump . Gotta believe this guy's doing his best , but wonder if y'all have run into this . THANKS !

Wrenchbender Ret · 01-23-2010, 04:22 PM

I've done a lot of them & never had a problem like that. Ijust did 3 for a 3 carb settup i'm building up but I havn't run it yet. I've got some of the original pumps if you want me to send you one. I wonder who's kit he is using. I did a carb for an auto display & they furnished the kit. It was junk. I always use Carquest. georgec2434@yahoo.com

mike16 · 01-23-2010, 05:10 PM

some of the older kits are aged beyond use and others cannot tollerate some of the chemicals in the latest batches of gas. Also some cannot tollerate the alcohol mixs.

I read somewhere but cant find the article that the color of the accelorator pump plunger determines if will tollerate alcohol.

some are too old and some are junk

19673ontree · 01-23-2010, 07:04 PM

I did the 2bbl rochester on my 67 camaro 327 (SAME CARBURETOR ON THE 307) about a year ? well I guess 2 year's ago and heve never had a problem , those carb's are old school no need to send them anywhere just go to your local auto part's and get a kit $15 buck's then take it home take the carburetor apart clean everything good and put it back together !
I did the 1 bbl rochester for my 67 C10 on my computer desk last weekend and just got back from a 4 hour drive in it today run's like brand new ,,,accelerator pump had dissentigrated !
one tip is to measure your float two or three time's double checking the level and the drop , cause too much or to little fuel in the bowl will make the best rebuild job in the world not run right ,,,

19673ontree · 01-23-2010, 07:07 PM

NAPA also has a good carburetor kit the echlin brand ,

697498chevy · 01-23-2010, 07:52 PM

THANKS for all the good feedback . WRENCHBENDER , I may take you up on your offer . I've rebuilt this carb before , after 220 ,000 miles I thought I'd let a pro do it . A few days ago he e-mailed that he was gonna try an Echlin kit . What happens when the pump comes apart the throttle jams and I'm cruising at 30 mph . THANKS AGAIN !

19673ontree · 01-23-2010, 07:56 PM

pump will not jamb the throttle it just make's it not take gas ,,

697498chevy · 01-23-2010, 08:11 PM

Hate to disagree , but I know for a fact it will . Happened twice .

01-23-2010, 04:14 PM	#1
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 262	1969 307 2 bbl Rochester Wonder if y'all have rebuilt one lately ? Sent my off almost a year ago . Came back twice and ran for bit until accel pump came apart . Builder says he can't find a good pump . Gotta believe this guy's doing his best , but wonder if y'all have run into this . THANKS !

01-23-2010, 04:22 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,207	Re: 1969 307 2 bbl Rochester I've done a lot of them & never had a problem like that. Ijust did 3 for a 3 carb settup i'm building up but I havn't run it yet. I've got some of the original pumps if you want me to send you one. I wonder who's kit he is using. I did a carb for an auto display & they furnished the kit. It was junk. I always use Carquest. georgec2434@yahoo.com

01-23-2010, 05:10 PM	#3
mike16 Registered User Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,529	Re: 1969 307 2 bbl Rochester some of the older kits are aged beyond use and others cannot tollerate some of the chemicals in the latest batches of gas. Also some cannot tollerate the alcohol mixs. I read somewhere but cant find the article that the color of the accelorator pump plunger determines if will tollerate alcohol. some are too old and some are junk

01-23-2010, 07:04 PM	#4
19673ontree CAN'T FIX NOTHIN Join Date: Sep 2006 Location: SOUTHRUST VIRGINIA !!! Posts: 2,112	Re: 1969 307 2 bbl Rochester I did the 2bbl rochester on my 67 camaro 327 (SAME CARBURETOR ON THE 307) about a year ? well I guess 2 year's ago and heve never had a problem , those carb's are old school no need to send them anywhere just go to your local auto part's and get a kit $15 buck's then take it home take the carburetor apart clean everything good and put it back together ! I did the 1 bbl rochester for my 67 C10 on my computer desk last weekend and just got back from a 4 hour drive in it today run's like brand new ,,,accelerator pump had dissentigrated ! one tip is to measure your float two or three time's double checking the level and the drop , cause too much or to little fuel in the bowl will make the best rebuild job in the world not run right ,,, __________________ 1967 C10 Shortbed Fleetside Small back glass 6 cyl 3spd on the tree 3.08 gears underdash AC Last edited by 19673ontree; 01-23-2010 at 07:05 PM.

01-23-2010, 07:07 PM	#5
19673ontree CAN'T FIX NOTHIN Join Date: Sep 2006 Location: SOUTHRUST VIRGINIA !!! Posts: 2,112	Re: 1969 307 2 bbl Rochester NAPA also has a good carburetor kit the echlin brand , __________________ 1967 C10 Shortbed Fleetside Small back glass 6 cyl 3spd on the tree 3.08 gears underdash AC

01-23-2010, 07:52 PM	#6
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 262	Re: 1969 307 2 bbl Rochester THANKS for all the good feedback . WRENCHBENDER , I may take you up on your offer . I've rebuilt this carb before , after 220 ,000 miles I thought I'd let a pro do it . A few days ago he e-mailed that he was gonna try an Echlin kit . What happens when the pump comes apart the throttle jams and I'm cruising at 30 mph . THANKS AGAIN !

01-23-2010, 07:56 PM	#7
19673ontree CAN'T FIX NOTHIN Join Date: Sep 2006 Location: SOUTHRUST VIRGINIA !!! Posts: 2,112	Re: 1969 307 2 bbl Rochester pump will not jamb the throttle it just make's it not take gas ,, __________________ 1967 C10 Shortbed Fleetside Small back glass 6 cyl 3spd on the tree 3.08 gears underdash AC

01-23-2010, 08:11 PM	#8
697498chevy Registered User Join Date: Jan 2009 Location: South Carolina Posts: 262	Re: 1969 307 2 bbl Rochester Hate to disagree , but I know for a fact it will . Happened twice .



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