Newbie rebuilding 2 Barrel Carb? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TruckinDaddy · 03-26-2005, 10:56 AM

I am think about rebuilding the Rochester 2G Carb off of my 68. I can replace it with a reman unit for $130 or buy a kit for less than $20. Also, if using a rebuild kit, any additional materials or supplies you would suggest? How about buying a kit? Good luck or bad experiences with a particular kit?

Thanks!

JimKshortstep4x4 · 03-26-2005, 11:55 AM

I have had good luck with the carb kits from NAPA.

Jim

cdowns · 03-26-2005, 12:02 PM

just take your time and follow the instructions, they have carb cleaner in a gallom can so you can dip the carb to clean it it does a great job makes the carb sparkle

68speedalert · 03-26-2005, 12:10 PM

It helps ALOT to have compressed air to clean passages. Even with, use an aerosol carb cleaner (again napa is great) to check each passage in it. Check all holes/passages in the body and base. BTW, wear saftey glasses. Nothin like a cold shot of carb spray in the eye to wake you up!

Count the number of turns to seat each mixture screw and write it down. Reset them when putting back together, will help on restarting.

After you get it started and running, shut it off. Look down the throat of the carb and stroke the throttle open. Watch for 2 streams of fuel, one in each barrel, to shoot steady a strongly. I've found a lot of problems with new accel pumps lately. I guess it's because of old stock sitting for a while.

Use NAPA kits only.

LeRoy · 03-26-2005, 01:14 PM

The only advice I got is give yourselve atleast a couple of hours. Once you start don't stop till finished. It's amazing what you forget. Also the kit is for many different carbs so excess parts in this case is a good thing, lol

TruckinDaddy · 03-26-2005, 03:04 PM

Great advice, Thanks guys. I'll check out Napa for that kit ASAP. And I am encouraged by LeRoy,

Quote:

give yourselve atleast a couple of hours

I was thinking it might be a multiple day job.

Cool!

inline6Bill · 03-26-2005, 03:11 PM

Relax, take your time, don't rush through it, and you will be fine. If in doubt, double and triple check everything you do.

stllookn · 03-26-2005, 07:32 PM

Use a big table and lay down paper so that you can strategically place the parts as you remove them...even sketch if you need to or take digital pictures. If you have little kids...tape the parts down or they will walk off...LOL...ask me how I know this!

TruckinDaddy · 03-26-2005, 09:30 PM

Quote:

Originally Posted by stllookn

even sketch if you need to or take digital pictures.

I am starting to wonder how guys did all of this BEFORE digital cameras.

I must have taken a dozen pics of the carb before I took it off, trying to get every possible detail and angle. Not to mention all the pics I have taken of rust in the past few days.

Brainchild · 03-26-2005, 10:32 PM

Quote:

Originally Posted by TruckinDaddy

I am starting to wonder how guys did all of this BEFORE digital cameras.

I must have taken a dozen pics of the carb before I took it off, trying to get every possible detail and angle. Not to mention all the pics I have taken of runt in the past few days.

We had a good remembery

Or stood in the middle of the shop with a hand full of parts,and a look of confusion

It's not a really hard job,just a lot of small parts that all have to be put back in the right place in order for it to work correctly.

Take your time.

jimfulco · 03-27-2005, 04:07 AM

[QUOTE=TruckinDaddy]I am starting to wonder how guys did all of this BEFORE digital cameras.

QUOTE]

Polaroids!

If your carb is original, don't trade it in on a rebuilt carb. Commercial rebuilt carbs are famous for not working very well. If you need more than a home-grown rebuild, take yours to a shop & have it done. It's already calibrated for your engine & it will work much better than a "fits-all" rebuilt unit.

TruckinDaddy · 03-27-2005, 02:20 PM

OK, one more question before I decide to try it myself. The carb was leaking fuel. It was most noticeable dripping slowly from the throttle linkage. Should a rebuild take care of this? I assume so, if it is just a failed gasket.

03-26-2005, 10:56 AM	#1
TruckinDaddy What's that funky smell? Join Date: Mar 2005 Location: Austin, TX Posts: 610	Newbie rebuilding 2 Barrel Carb? I am think about rebuilding the Rochester 2G Carb off of my 68. I can replace it with a reman unit for $130 or buy a kit for less than $20. Also, if using a rebuild kit, any additional materials or supplies you would suggest? How about buying a kit? Good luck or bad experiences with a particular kit? Thanks! __________________ Mike S 68 C10 Long Step (Pretending to be a Long Fleetside) Grandpa's Farm Truck 3 on the tree, 307, No power brakes or steering Factory Options - HD rear spring and Ammeter/Oil Gauges My truck blog My Car Domain page

03-26-2005, 12:02 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	just take your time and follow the instructions, they have carb cleaner in a gallom can so you can dip the carb to clean it it does a great job makes the carb sparkle __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-26-2005, 12:10 PM	#4
68speedalert Semi-Senior Member Join Date: Feb 2003 Location: Washington, MO Posts: 390	It helps ALOT to have compressed air to clean passages. Even with, use an aerosol carb cleaner (again napa is great) to check each passage in it. Check all holes/passages in the body and base. BTW, wear saftey glasses. Nothin like a cold shot of carb spray in the eye to wake you up! Count the number of turns to seat each mixture screw and write it down. Reset them when putting back together, will help on restarting. After you get it started and running, shut it off. Look down the throat of the carb and stroke the throttle open. Watch for 2 streams of fuel, one in each barrel, to shoot steady a strongly. I've found a lot of problems with new accel pumps lately. I guess it's because of old stock sitting for a while. Use NAPA kits only. __________________ '68 50th Anniversery LWB Custom Fleetside, '77 305 v-8, turbo 350, factory speed alert (still works), '71 drivetrain w/front discs. Some call it ugly yellow, others call it Ochre '83 Jeep CJ-7, <80,000 miles, original owner '04 Chevy Suburban, 4x4, 2500, 6.0 ltr, Predator Diablo programmer '95 GMC K1500 Extended cab

03-26-2005, 01:14 PM	#5
LeRoy Registered truck nut Join Date: Dec 1999 Location: Mt. Vernon, Washington, USA Posts: 1,584	The only advice I got is give yourselve atleast a couple of hours. Once you start don't stop till finished. It's amazing what you forget. Also the kit is for many different carbs so excess parts in this case is a good thing, lol __________________ MOUNT VERNON, WASH. STATE Need a part? Just PM me

03-26-2005, 03:11 PM	#7
inline6Bill A classic GM kinda guy Join Date: Mar 2004 Location: Phoenix, Arizona Posts: 296	Relax, take your time, don't rush through it, and you will be fine. If in doubt, double and triple check everything you do. __________________ Old school rap music: a dual exhausted GM 6 with no mufflers. "If you can find a better vehicle, buy it" Lee Iacocca, Chrysler commercials of the '80s. "I did. They are called Classic GM pickups !!!"

03-26-2005, 11:55 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	I have had good luck with the carb kits from NAPA. Jim

03-26-2005, 07:32 PM	#8
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Use a big table and lay down paper so that you can strategically place the parts as you remove them...even sketch if you need to or take digital pictures. If you have little kids...tape the parts down or they will walk off...LOL...ask me how I know this! __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

03-27-2005, 04:07 AM	#11
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	[QUOTE=TruckinDaddy]I am starting to wonder how guys did all of this BEFORE digital cameras. QUOTE] Polaroids! If your carb is original, don't trade it in on a rebuilt carb. Commercial rebuilt carbs are famous for not working very well. If you need more than a home-grown rebuild, take yours to a shop & have it done. It's already calibrated for your engine & it will work much better than a "fits-all" rebuilt unit.

03-27-2005, 02:20 PM	#12
TruckinDaddy What's that funky smell? Join Date: Mar 2005 Location: Austin, TX Posts: 610	OK, one more question before I decide to try it myself. The carb was leaking fuel. It was most noticeable dripping slowly from the throttle linkage. Should a rebuild take care of this? I assume so, if it is just a failed gasket.



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