Author Topic: Quadrajet Float Bowl: Is anything not repairable?  (Read 691 times)

1967RS/SS

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Quadrajet Float Bowl: Is anything not repairable?
« on: April 24, 2015, 09:50:24 PM »
I have to send out the bowl to have the fuel inlet heli-coiled because they are a bit worn,  but before I do, I don't want to get my hopes up.  From these pictures, Is anything not repairable/reusable within the float bowl itself?   






1967 RS/SS L-48
Van Nuys 01C
Joe

Mike S

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #1 on: April 25, 2015, 12:03:01 PM »
 I see nothing that would make a repair worthless....things look fine.
This sure looks like an earlier body judging from the use of the plunger.
If this were mine I would not hesitate to send it out for a thread repair.


Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

z28z11

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #2 on: April 25, 2015, 02:06:29 PM »
Make sure you pay attention to the well plugs on the bottom of the bowl. Old well plug gasket material is still stuck on these; either clean/inspect and make sure you use a kit with the replacement gasket, or remove the soft plugs, drill, tap and plug the bottom of the wells to prevent gas leaking  back out out of the carb into the engine. To me, that's always been the worst design feature of the Quadrajets - otherwise, they are great carbs, easy to work on and last forever.

Just my opinion -
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

1967RS/SS

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #3 on: April 25, 2015, 05:17:31 PM »
Thanks for the help fellas.


Will a soaking in a carb dip remove that gasket/epoxy crud?
1967 RS/SS L-48
Van Nuys 01C
Joe

Mike S

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #4 on: April 25, 2015, 11:45:05 PM »
Thanks for the help fellas.


Will a soaking in a carb dip remove that gasket/epoxy crud?


Gasket, yes, but the epoxy will possibly have to be ground off if you want to remove it.
It depends on how the surface was prepped before the epoxy was applied (example: if it was roughed up to increase the mechanical bond of the epoxy to the metal).

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

1967RS/SS

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #5 on: April 26, 2015, 12:27:03 AM »
Got it. Thanks
1967 RS/SS L-48
Van Nuys 01C
Joe

mikefam

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #6 on: April 30, 2015, 10:49:14 AM »
One thing that is common on Qjets and not repairable is when the mechanic over tightens the two front mounting bolts and crushes the carb body and top. I have seen several damaged like this over the years. You can tell if you have a problem by putting a straight edge over the top gasket surface on the body.

Mike.
68 Convertible w/327 275hp donor engine from a 67 Impala and TH350

mickeystoys69RSSS

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #7 on: May 03, 2015, 02:03:42 AM »
Make sure you pay attention to the well plugs on the bottom of the bowl. Old well plug gasket material is still stuck on these; either clean/inspect and make sure you use a kit with the replacement gasket, or remove the soft plugs, drill, tap and plug the bottom of the wells to prevent gas leaking  back out out of the carb into the engine. To me, that's always been the worst design feature of the Quadrajets - otherwise, they are great carbs, easy to work on and last forever.

Just my opinion -

Anyway to fix the well plugs without drilling or removing the carb and rebuilding it?

z28z11

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #8 on: May 03, 2015, 04:19:48 AM »
Not that I am aware of. You can regasket using the new well gasket in most kits - they could deteriorate over time, which is why some people drill/tap/plug them. Quick way to seal 'em is epoxy, but even that's not 100%. Plugging them permanently is the only way to be 100% sure. In any event, you have to disassemble the carb to access the well, which you do anyway when you rebuild one.
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

zman1969

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #9 on: July 03, 2015, 06:21:02 PM »
I had the original carb sent to be restored on a 72 455 H/O trans am and somewhere it its past the frt mounting bolts were tightened too much and warped the top and main body beyond repair :( it was visable when you looked but I didnt till after was returned they replaced the main body and it did run alot better afterwards dropped .5 in the 1/8. I always wondered how you could do that? 72 was the last year for factory aluminum manifolds I would of thought threads would of pulled before that happened
Rich

69 RS/Z DZ302 Daytona bumble bee
69 T/A clone LS6/6sp
69 Nova SS 396

myblue67

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #10 on: July 04, 2015, 06:54:33 PM »
Read this this string of comments and the scenario described by Z28Z11 (April 15) is exactly what I have going on. I need a good carb guy to send it to. Any reliable suggestions?

z28z11

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #11 on: July 29, 2015, 05:15:56 AM »
Check out Quadrajetparts online - they offer all pertinent parts, plus a pretty unique way to seal the well plugs I had not seen before. Pretty inexpensive and simple to do - positive, permanent sealing for the secondary well plugs. Read the tech article in the website for the procedure.

I've found my 7029202 carb has been Helicoiled on the inlet in the past - evidently a poor job, so it leaks no matter how tight I've gotten the connection, or with a liberal dose of Permatex #2. These guys offer the services to Helicoil the inlet and machine the gasket surface, and pressure check the repair to make sure it seals. After struggling with this for a couple of weekends, I think it's gonna make the trip to NJ for a hopeful repair.

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

TRLAND

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Re: Quadrajet Float Bowl: Is anything not repairable?
« Reply #12 on: July 29, 2015, 01:23:18 PM »
I need a good carb guy to send it to. Any reliable suggestions?

Lars Grimsrud
Mike in Northern Illinois
1967 RS 327