Rochester 2G 2GC Rebuild Part 2 of 2

[@ZeitZuGehenMusik]

I rebuilt the carb on my 1978 Monza S, with the aid of this video, in addition to rebuild kit instructions. Thanks!!!

[@squirrely9415]

These 2 videos have saved my life, I have not been able to find the proper kit that has everything I need and the kit for this is everything I need

[@MikesCarburetor]

Nice to hear.

[@squirrely9415]

@@MikesCarburetor I do have an issue however, I’ve lost the check ball that goes under the spring with the metal t under the Venturi piece

[@squirrely9415]

@@MikesCarburetor can you possibly tell me the kit number for the rebuild kit for this carb? All the ones I’m finding aren’t right, i do know it’s a small base.

[@MikesCarburetor]

@@squirrely9415 Sorry I don't remember which one I used. If 68 or later the number will be stamped on the side of the bowl, otherwise send us pictures of all the gaskets and the overall length of the pump to [e-mail]

[@stevenanzelc9012]

Thanks Mike!! Rebuilding a very similar Rochester 2 barrel for my 1967 LeMans. I think that was the best pair of instruction videos I have ever had the pleasure to watch. Extremely helpful little tips throughout. I appreciate you.

[@marklemist6928]

Mike's is the place. Always has what I'm looking for and great customer service.

[@patroll330]

Thanks for sharing very similar to a late 1970s 2G carb. would have been lost without your video. Thanks Mike

[@anthonybradley7753]

Thanks for the video! Thanks for the possible problem suggestions through the video aswell

[@DamionStLouis]

Excellent video and excellent website for parts for these carburetors.

[@aoussoren]

Great video. Purchased my kit from you and it went great.

[@NoGoodCREeP]

Thanks for the video this is my 4th carb rebuild.

[@fuzzyfultz]

Great video and info Mike. Thanks a bunch. Keep up the good work. Now I can rebuild this carb for my GM 2.5 Mercruiser motor on a boat I bought and in which I got burnt in the deal. So many dishonest people in the world today. Thanks for your help on my 1989 Thundercraft 18' onboard boat.

[@davidlis6709]

I have 1970 350-2bbl carb. If the cars sits for 3 days or more, it will not start right way because all the gas drains from the bowl. I totally rebuilt the carburetor. ??? The idle is steady at 800. Good pickup but I only get about 12 mpg. What are they suppose to get?

[@davidlis6709]

Is there an adjustment for the vacuum power piston? If the vacuum power piston is in the down position, (when the carburetor is fully assembled) (pressing down on the power valve in the no run, no vacuum position) does that mean with the power valve open, the gas in the bowl can flow out of the carburetor and into the intake manifold when the car is sitting without running for weeks? I ask this question because when I do not use the car for weeks or longer, I have to crank the engine so the carburetor fills up with gas before it starts. It does not bother me because it gives the engine to build up oil pressure before starting. How can you test it the vacuum power piston is working? 1970 350-V8 has a aluminum plate between the manifold and the carburetor, I believe it is to slow down the heat so it does not cause vapor lock, best guess without seeing it. In saying that, do you think the heat is evaporating the gas in the bowl when sitting in the off position? Thanks, David

[@davidlis6709]

@@MikesCarburetor Thanks

[@captainbat100]

Great video just did the twin jet on the 57 it started and ran perfect - thanks Mikes Carbs for putting this up. Can you PM me the costs of a couple of kits for the 2gc small base sent to Australia please. Cheers Scott

[@tsees36]

Thanks for your light adjustment

[@zanewalter9795]

Is there any way you can explain the ports coming off of the carburetor in the picture of the video, that is the exact carburetor that I have there is a tube coming off the top of the pump I'm assuming just an overflow tube and there's a tube coming off the top of the inlet of are I'm assuming it's just a clean air tube do these need to be connected or plugged

[@douglasthomas4604]

Hey Mike, At 17:33 you failed to make note of installing the Accelerator Pump Return Spring into the carburetor housing. At 17:38, I can see the spring is in the bore for the accelerator pump and 17 17:32 it is still on the bench. Thanks for the video.

[@crowkane2]

Excellent video. couldn't have done mine without this, thanks.

[@TovarG123]

How do I determine what gasket goes on before installing top cover? Solid gasket under float or open gasket... Rochester 2gc, mercruiser 2.5 120, thanx

[@jaimite]

finally someone explains how to determine whether I need a check ball in the accelerator pump bore! thanks!

[@babak1969van]

Thank you sir! this video is very eye opening. I need your advice on this 2G model, R2-2GC 17054664. Is this s good candidate for my nova? The carb seems to be from a 77 California (like a Chevy C10). Since its a smog engine carb should I bother using this or should I move on to something else? Thanks for your time!. My engine is from a 67 Camaro inline 6, 155hp. Thank you

[@LuisCastillo-zu9td]

Thanks Mike for the info and I would like to know the carburetor kit # for the g2 cause my doesn't have a tag or # and is the same you just rebuild. Thanks

[@leroycharles9751]

Mike, can you ballpark a throttle position ( 10%, 25%,50%) point at which the piston starts to open the power valve? Thanks.

[@MikesCarburetor]

No clue, but it is all about vacuum. Any time the vacuum starts to drop, the power valve starts to open.

[@BoxcarsGarage]

So, if a guy was going to put together a 3 x deuce set up would you consider going with a Rochester 2gc in the middle and the outsides could be 2g? Do you then delete the 2g manual chokes with something? Sorry for a very basic question. Thanks for the vid.

[@ACDesignsGarage]

Thanks for the video, it really helped!!!

[@phouse123]

What solution did you use in your ultrasonic cleaner, sorry if I missed it.. received my kit just in the cleaning stage now

[@arlandrister5578]

? I have a 2cg 2c carb it leaking at the bottom of the carb in the front I bought the carb a year ago envy suggestions on why it leaking where it leaking at looks like thes an adjustment screw there if you want I can give you a pic

[@jeffclark7972]

I have a Rochester 2GM, the fuel will not flow freely from the bowl to the accelorator pump with the check ball removed. I assume the pathway is clogged based on the amount of junk in the little filter in the bowl. Suggestions on how to clean it?

[@shoreline8686]

Problem I have had several times is after rebuild (and before) I could turn in A/F mixture screws until bottomed and engine still idles (650), I figured Float level to high but not that. Any other ideas? Thanks

[@larryanderson8067]

Hi Mike, Do you rebuild carbs for the public? I have a 64 impala 283 2 barrel carb that seems to be flooding on me. I don't know enough to rebuild it myself, can you help me? Thanks

[@markusschmid4164]

Thank you Mike. Good job. Best, Markus

[@tech270154]

thanks for all the vid . i have a question about carburetors in general , what do you think about the controversy of soaking the carburetors gaskets in a mineral spirit like varsol for a few hours prior to the installation ? thanks for the explanation

[@tomtait5337]

Great videos. I have purchased the rebuild kit, the thermostat and vacuum actuator from you and am completing assembly, but my 2gc does not have a piston inside the thermostat housing that you show in this video starting at 34:00. Does that mean someone left it our of a previous rebuild or is it not needed if there is an external vacuum actuated chocke unit that opens the choke plate under vacuum? If I need one it would be the exact unit you show getting installed at the 34 minute mark, plus any screws or tubes inside the housing to plumb it. Any help? What does that piston do?

[@tomtait5337]

@@MikesCarburetor Thank you!

[@AndysDogHouse]

Hey Mike. Great carb video. You really helped me out. I really haven't done anything like this before, but I want to learn everything that I can. I am rebuilding a Rochester 2 barrel carb similar to the one you are doing in this video. Mine doesn't have the choke on the side of the carb. There are no numbers on mine so I really don't know anything about the card. I was told it came out of a 1968 Camaro. ??? You mentioned the check ball in the main discharge. Do all carbs have one? I was following you along and when I got to this part in your video, I didn't have any check balls in either hole. Should I put one in the main discharge? I got this carb from a friend and I think it was rebuilt before and maybe it got lost. I am just guessing. Any help would be appreciated. Thanks for sharing.

[@collinemorris]

So, I guess alignment of the emulsion tube sleeve is not critical and the orofices on the sleeve and tube doesn't need to align? I noticed on older rebuilds that there's a tab on the sleeves which slide into a channel to prohibit rotation and misalignment. Anyway, all this becaue i tore down my 2GC to troubleshoot off-idle/throttle tip-in sputter, thinking that misalignment may be the issue.

[@TheCnullery]

Mike, maybe you can help me out. I have completed the rebuild and after reinstalling onto the motor I cannot get it to run. When I look down the intake of the carb you can watch fuel run out of the venturi cluster after the key has been turned off. What can I do?

[@jdeanmj]

Where can I buy a new float? Also below the check ball that's underneath the return spring has a small metal round clip. Is that supposed to be there? It looks like it's blocking the ball from seating all the way inside the groove.

[@brianmacmac1000]

Thought forsure you said you were going to use the brass float.great vids ,,thanks for the help

[@chuck1607]

My hot air choke housing wont come off. I don't have a screw holding the hot air choke housing to the shaft. It appears to be a factory plug holding the hot air choke piston to the shaft. How do I solve this issue?

[@chuck1607]

@@MikesCarburetor thank you sir. You are correct. It took some patience but I was able to slide it out after removing the choke butterfly. Thankq for the quick reply.

[@DavidSanchez-bk3gx]

Question for ya, I noticed the idle accelerator get stuck a few times when tweaking all the way up is that the normal? Just verifying before I put mine together

[@CubasAutomotive]

Great videos Mike! thanks a bunch!! Please take care!

[@JK4LIFE80]

I have a similar carb that has a line next to where fuel connects. What do I hook that too?

[@MikesCarburetor]

I would have to see a picture. Can't picture it in my head. Send to [e-mail]

[@bc2475]

Great video Mike. What is the vent for? Located in front of the accelerator pump linkage. Is it supposed to be open when the engine is at idle?

[@bc2475]

Mikes Carburetor my vent seems to open when I let off the throttle in the spring on the intake pulls the throttle back then the valve opens when I step on the gas pedal the valve stays closed. Could this be why I can’t keep my engine running?

[@trucksntractors7160]

Hi Mike, I purchased from you before and have been quite satisfied with your products but I need your advice, I have this same carburetor as you are rebuilding in this video and I am still having a hesitation problem, I can move the throttle and fuel is squirting out the accelerator pump discharge holes (I'm unsure of the technical name for them but either way it seems to be working properly) but while it's on the truck, it still bogs if I just hit the gas like a normal person, I have to hit the gas 3 or 4 time to get it to catch and not die while accelerating. if I'm at speed though I can mat it and it will do great, however from a stop if I mat it, it hesitates and unless I let off and mat it like 3 or 4 times afterwards it will die. any suggestions?? (P.S. It revvs great while the choke is on)

[@trucksntractors7160]

+Mikes Carburetor thanks mike, will do and post results

[@michaelst.george9856]

Hey Mike, thanks for the videos. I just received my kit from you and will be diving into the rebuild tonight. Question though. I have two 2G's and they both have npt threads on the rear of the throttle body. It didnt attach to anything when it was installed... and it looks really hokey. I'm just going to buy a plug for it but why is it popular to have full manifold vacuum like that?

[@michaelst.george9856]

Ahhh okay thank you.

[@KurtfromLaQuinta]

I did a rebuild on a Rochester on my brothers '78 Olds. Oh my goodness, what a complicated pile of poo.Thanks you for this video. I think I can do all three of my 2 barrel Holley Six Packs faster than this one Rochester.

[@chucknortis5418]

hey mike, have a question. have an 85 s10 with two barrel, ok i understand the upper choke valve but when does the other valve open on top or does it? i would have thought when you revved the engine it would open to let more air in. i know the bottom ones open and it just seems that both top would open with the bottom. its a e2se i believe. thanks tim

[@chucknortis5418]

no not the choke the other intake valve choke works fine, ok know after playing with it when cold it wont even open with my finger, choke will throttle plat wont but noticed when warm the top throttle plat will open with finger so im guessing one of these many linkages stops it from opening while cold

[@unsaltedlife5998]

chuck nortis is it on a boat? If it is they work a little different. The only value or butterfly on the top is the air horn is the choke either a boat or a car will open when they are warm

[@anthonybrown3593]

Hey Mike, Where does the PCV hook up to on this carb. I am having a heck of a time. Thanks

[@brianrowland7113]

MIKE! I believe the carb on my 1969 Jeep was plugged as there was a lot of gas squirting out of the fuel pump and the engine would only run pouring gas into carb. I ordered your kit and followed the vid and the Jeep started in 1 second!! Thanks! However, I still get a little gas squirting out of the fuel pump. Is the pump shot or do Ineed a new copper filter at the carb inlet?

[@brianrowland7113]

Awesome. Thanks. And thanks again for the great kit and videos. I had never rebuilt a carb before and it works perfectly. Mikes carbs is the real deal folks.

[@brianrowland7113]

OK. I replaced the fuel pump and now it floods. The smallest of adjustments to the float either starve it or flood it. I have the black rubber float. You mentioned you have had troubles with these. Do I need a brass one or a regulator? Thanks

[@brianrowland7113]

So should I get a new float? Which one?

[@MenacingRabbit]

Brian Rowland are you still having issues with the flooding? I was wondering if I could offer any help.

[@MenacingRabbit]

Mikes Carburetor He's talking about his carburetor flooding and over flowing not his fuel pump. He swapped his fuel pump but now he's getting carburetor flooding.

[@robdekker6030]

my 2g is missing emulsion tubes, is this normal? also how do i get a kit and float that will work when my carb has no tag or stamp on it?

[@jarettadkins1532]

So if i understand correctly there should be some sort of retainer to hold in accelerator pump inlet check ball? Apparently someone has left it out so now the check ball keeps coming out of the hole and the accelerator pump stops working. Does a kit come with a retainer?

[@jarettadkins1532]

I figured out what the problem was. I took the top off the front carb to see what kept the ball from coming out. After a quick inspection i realized that the springs where reversed on the accelerator pump, the smaller diameter spring should go into the bore with the pump on top of it.

[@JMBTV3]

What's the best solution/chemicals to use in an ultrasonic cleaner for carbs?

[@phouse123]

I asked the same question

[@hangar4avs]

I have had the best luck with Simple Green Extreme. 3:1 mixture.

[@TheSkoto1]

my carb is missing the removable venture tubes do they have to be in there?

[@cloudkattdaddy9025]

How do you install a injector throttle body for a Rochester carburetor?

[@chrisphillips9846]

Hey Mike ! If I sent you my carb . What would you charge to rebuild it ?

[@Jubi316]

I have the 2gc I need the power valve assembly and power valve also , how much

[@johnbeer5242]

FamilyMann 350$ for everything or 70$for some parts 😀

[@racer67]

At 2:25 when u say vacuum leak and point to the end of the buterfly shaft saying u could cause a vacuum leak there, if fuel leaks out of the same place there would that be an indication that it also can leak air and be a vacuum leak in the same spot????? I ask becus i had fuel leak from there and i thought i had a vacuum leak in the same spot earlier on.

[@racer67]

@@MikesCarburetor thank you! I think im dealing with a stuck carburetor float in my 67 impala its a rochester 2g and when i turn the key it turns over but wont start and gas sprays like a mist out the top of the carburetor.

[@racer67]

@@MikesCarburetor just an update the carburetor was flooding but the problem was the old timeing chain gear with nylon teeth the nylon teeth were gone and the chain slipped and the crankshaft in relationship with the camshaft was off "out of time" so i replaced the gears and chain with a double roller chain! Many thanks for the 2 videos on the 2gc rebuild i also rebuilt my carb and now the ol girl runs like a swiss watch! I am now a subscriber to your channel! Again thank you!

[@markduvall5918]

Thank you

[@ImDeadAtBirth]

I bought my kit from your store.I'm a registered company. I do see a dvd for sale, but no other videos posted....

[@ImDeadAtBirth]

***** it took me back to this video! :P

[@nandoGdog]

My 2g will not start if the truck sits for 2 or 3 day unless I prime the carb, if I drive it everyday no problem. What could the problem be?

[@unsaltedlife5998]

nandoGdog if you’re oil smells like gas then it’s leaking into the engine, this could cause a breakdown of the oil leading to engine failure. Install a inline fuel filter to see if it’s going back to the fuel tank.

[@garymelik3805]

For cleaning passages try a gas welding tip cleaner

[@MikesCarburetor]

It may be too abrasive for some passages.

[@rayjohnson4395]

You left screen filter off goes in fuel bowl next to accelerator pump well

[@hangar4avs]

I wondered the same thing. But no reply to it?

[@markwilson816]

Hello I have a 17086107 211T6 1 gm 2 jet rodchester from a ford 2.3 marine motor looking for a rebuild kit, boat has for 3 years boat will idle and runs great as soon as you giv it gas the boat will speed up and than slowly die,

[@davemcr1436]

Hope you had better luck than me.. I got a kit from oreillys, that was suppose to fit, but don't. Marine carbs are oddballs, found out. Marineengine.com #18-7086, has them, wished i would have waited and got the right one, but found a stuck check ball in acc pump well and cobbled together. Great video though!

[@joeortega7759]

I had the same problem with my 1988 Bluefin sportsman 1950 omc 2.3 ford. It was a bad accelerator pump which comes in the kit. This is the exact carb in my boat which was awesome. very nice video

[@rafaelvillasmil9447]

Quisiera que lo esplicaran en Español