Carb rebuild almost done, but DAMN... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**COBALT** · 05-13-2002, 02:22 PM

I think I'm the redheaded stepchild of carb rebuilders. I started my rebuild of my Rochester 2G carb on Saturday morning, and I'm still not done.

Turns out the rebuild kit, the float, and some of the hard parts I have to replace were either incorrect or hard to find. I spent most of my time in the car going to NAPA, and arguing with them about the parts I needed (they kept wanting to use the carb number to look up parts, which is how I got the INCORRECT parts to begin with). Literally, it was a process of looking at the pictures in their carb books, and picking out part numbers.

So...here's the good news:

1. Finally got a replacement Choke Pull-off. Got the last one in the entire Seattle/Tacoma area.

2. Finally got the correct float.

3. Everything's been cleaned and inspected. Replacement screws found, and the carb is ready to put back together.

ok, here's the bad news:

4. Rebuild kit turns out to be WRONG. Gaskets are all the wrong size and shape. Throat sizes in the gaskets are too big, and there's gaskets missing. I had to back-trace the carb kit they gave me through NAPA's carb book, find the gasket included in the kit, look for one in the same group that matches the old one, and then find the kit for THAT one, then order it. Hopefully it will be right (it comes in tomorrow).

5. My dad's German Shepard, which likes to drag stuff out into the yard somehow got into the shop and pulled the rag off the bench that had all of my linkage parts laid out in order on it. I got all the parts ok, but now I don't know how they go onto the carb-I had no camera at the time, so I laid them out in order like an assembly diagram. The instructions with the kit DO NOT show the specifics of the linkage.

Anyone have close-up pictures of their Rochester 2G? If someone has this carb can they do me a HUGE favor and go snap some for me? Please? If not I'll have to guestimate using the measurements for adjustment and see if I can get the parts back in the right places...

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

brennecke · 05-13-2002, 02:40 PM

The rochester rebuild manual from haynes is cheap and has decent pictures.

**COBALT** · 05-13-2002, 02:56 PM

You mean this one?

Go to Amazon.com

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

brennecke · 05-13-2002, 03:03 PM

YUP. That's what I am using.

**COBALT** · 05-13-2002, 03:05 PM

Ordered. Thanks brennecke!

Can anyone else help at all?

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

johnnyp · 05-13-2002, 03:21 PM

Try these two for pics: http://www.classicpreservation.com/r...ermodel2G.html http://www.employees.org/~bmckenna/cad/cad3.html

------------------
72 Sierra Grande - "Maych"

If a man speaks in the middle of a forest and there is no woman around to hear him, is he still wrong?

Forget about "do it right the first time". Do it wrong the first time to learn how, then do it right the second time.

Maych Home Page

**COBALT** · 05-13-2002, 03:49 PM

This is great! Thanks johnnyp. The first one looks almost exactly like the accel. linkage side of mine.

The other pic didn't help me, though...I need a pic of the other side that has the choke pull-off and the connection to the stove on the intake manifold. Anyone?

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

[This message has been edited by new69owner (edited May 13, 2002).]

**COBALT** · 05-13-2002, 05:34 PM

I need more pics just like this:

The accel. linkage is identical to mine (even though this has an on-carb automatic choke and a much smaller fuel port). I can use this to reassemble the driver's side of the carb. Like I said before I need the passenger side (the choke side with a choke pull-off and the intake mounted coil).

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

[This message has been edited by new69owner (edited May 18, 2002).]

**COBALT** · 05-13-2002, 11:16 PM

ttt

**COBALT** · 05-18-2002, 12:15 PM

Well, I think I know why I've been having so much trouble getting parts, and getting this rebuild done...

When I finally got the right rebuild kit through NAPA (by looking at pictures-the only one that will work BTW) the data sheet in the kit has nothing but Marine applications in it! I think this is a boat carb. WTF?

So, I'm stuck rebuilding a carb I may not want. I'll be shopping for a 4bbl soon + new intake I guess. Oh well, it was good experience...

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

misfits · 05-18-2002, 05:15 PM

I'm rebuilding mine after I took it apart a few months ago. Darn things are like a jigsaw puzzle aren't they? LOL.

**COBALT** · 05-19-2002, 10:20 AM

No kidding. I can't imagine how many pieces Q-jets have...

Got it done. Truck runs like a champ now. Funny how it's probably a boat carb.

lol

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

05-13-2002, 02:22 PM	#1
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Carb rebuild almost done, but DAMN... I think I'm the redheaded stepchild of carb rebuilders. I started my rebuild of my Rochester 2G carb on Saturday morning, and I'm still not done. Turns out the rebuild kit, the float, and some of the hard parts I have to replace were either incorrect or hard to find. I spent most of my time in the car going to NAPA, and arguing with them about the parts I needed (they kept wanting to use the carb number to look up parts, which is how I got the INCORRECT parts to begin with). Literally, it was a process of looking at the pictures in their carb books, and picking out part numbers. So...here's the good news: 1. Finally got a replacement Choke Pull-off. Got the last one in the entire Seattle/Tacoma area. 2. Finally got the correct float. 3. Everything's been cleaned and inspected. Replacement screws found, and the carb is ready to put back together. ok, here's the bad news: 4. Rebuild kit turns out to be WRONG. Gaskets are all the wrong size and shape. Throat sizes in the gaskets are too big, and there's gaskets missing. I had to back-trace the carb kit they gave me through NAPA's carb book, find the gasket included in the kit, look for one in the same group that matches the old one, and then find the kit for THAT one, then order it. Hopefully it will be right (it comes in tomorrow). 5. My dad's German Shepard, which likes to drag stuff out into the yard somehow got into the shop and pulled the rag off the bench that had all of my linkage parts laid out in order on it. I got all the parts ok, but now I don't know how they go onto the carb-I had no camera at the time, so I laid them out in order like an assembly diagram. The instructions with the kit DO NOT show the specifics of the linkage. Anyone have close-up pictures of their Rochester 2G? If someone has this carb can they do me a HUGE favor and go snap some for me? Please? If not I'll have to guestimate using the measurements for adjustment and see if I can get the parts back in the right places... ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-13-2002, 02:40 PM	#2
brennecke Registered User Join Date: Apr 2000 Location: Missouri Posts: 469	The rochester rebuild manual from haynes is cheap and has decent pictures. __________________ Never tire of doing what is right II Thess. 3:13 Northeast Missouri 71 LWB original 350 3/speed Soon to be 500

05-13-2002, 02:56 PM	#3
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	You mean this one? Go to Amazon.com ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-13-2002, 03:03 PM	#4
brennecke Registered User Join Date: Apr 2000 Location: Missouri Posts: 469	YUP. That's what I am using. __________________ Never tire of doing what is right II Thess. 3:13 Northeast Missouri 71 LWB original 350 3/speed Soon to be 500

05-13-2002, 03:05 PM	#5
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Ordered. Thanks brennecke! Can anyone else help at all? ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-13-2002, 03:21 PM	#6
johnnyp Keepin' It Stock Join Date: Aug 2001 Location: Grand Island, Nebraska, USA Posts: 554	Try these two for pics: http://www.classicpreservation.com/r...ermodel2G.html http://www.employees.org/~bmckenna/cad/cad3.html ------------------ 72 Sierra Grande - "Maych" If a man speaks in the middle of a forest and there is no woman around to hear him, is he still wrong? Forget about "do it right the first time". Do it wrong the first time to learn how, then do it right the second time. Maych Home Page __________________ 72 Sierra Grande - Maych Forget about "do it right the first time". Do it wrong the first time to learn how, then do it right the second time.

05-13-2002, 03:49 PM	#7
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	This is great! Thanks johnnyp. The first one looks almost exactly like the accel. linkage side of mine. The other pic didn't help me, though...I need a pic of the other side that has the choke pull-off and the connection to the stove on the intake manifold. Anyone? ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! [This message has been edited by new69owner (edited May 13, 2002).] __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-13-2002, 05:34 PM	#8
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	I need more pics just like this: The accel. linkage is identical to mine (even though this has an on-carb automatic choke and a much smaller fuel port). I can use this to reassemble the driver's side of the carb. Like I said before I need the passenger side (the choke side with a choke pull-off and the intake mounted coil). ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! [This message has been edited by new69owner (edited May 18, 2002).] __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-13-2002, 11:16 PM	#9
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	ttt __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-18-2002, 12:15 PM	#10
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Well, I think I know why I've been having so much trouble getting parts, and getting this rebuild done... When I finally got the right rebuild kit through NAPA (by looking at pictures-the only one that will work BTW) the data sheet in the kit has nothing but Marine applications in it! I think this is a boat carb. WTF? So, I'm stuck rebuilding a carb I may not want. I'll be shopping for a 4bbl soon + new intake I guess. Oh well, it was good experience... ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

05-18-2002, 05:15 PM	#11
misfits Registered User Join Date: Feb 2001 Location: Sturgeon Bay , WI USA Posts: 375	I'm rebuilding mine after I took it apart a few months ago. Darn things are like a jigsaw puzzle aren't they? LOL.

05-19-2002, 10:20 AM	#12
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	No kidding. I can't imagine how many pieces Q-jets have... Got it done. Truck runs like a champ now. Funny how it's probably a boat carb. lol ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.



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