Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Pages: Previous12
Current Page: 2 of 2
Re: Often overlooked on a carburetor rebuild...tip
Posted by: dedwinson ()
Date: June 10, 2015 08:44AM

I just rebuilt my secondaries, and wish I had thought of this. Would have done the same to the carb halves as well.

Thanks for the tip and I won't forget for the next time for sure!

Dave Edwinson
Doing Vairly well in Minnesota
'66 Vert 140HP
www.frontiernet.net/~dedwinson


Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: corventure Dave ()
Date: October 04, 2017 07:37AM

I was asked about this recently... so here it is again!

I use this process on other parts as well. Some mentioned here.
Engine Rear cover.
Delcotron adapter = Alternator - Generator, fuel pump, oil filter mount.
Crankcase top cover.
Carburetor base.
Anything flat that needs dressing up.

smileys with beer

Corventure Dave

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Brizo ()
Date: October 04, 2017 12:40PM

Dave, If I may add to your thread, another common problem I'm seeing is crushed HV carb tops in the area around the upper mount stud hole from years of over torqueing. The top tightens at the stud but not around the edges of the bowl. And the screws cant always pull the top down to seal the gasket around the outer edges of the bowl. This can allow gas to run down the outside or inside of the bowl while driving. The only fix is to grind and file the area flat enough to let the top gasket contact all around again.

Dan Brizendine,
'64 8door Greenbrier 140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Bob Helt ()
Date: October 04, 2017 02:49PM

Hi Dave,
Good stuff!
Just one thing missing.
Cluster Specs

Idle tube = 57/64"
Main tube = 1.000"

Bob Helt

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: gnrand ()
Date: October 04, 2017 02:56PM

During my college days I worked for a company that lapped seals and they would use a figure eight pattern. Then they would turn the seal and lap with another figure eight pattern. I have been using this technique ever since. On the oil cover I also deburr the edges of the gears with a diamond file so it does not have a sharp edge to cut the cover surface. You can also take the edge of the cam lobes on a flat tappet cam but you need to be very careful.

Wildomar,Ca

1965 Corsa Hard Top
!965 Corsa Convertible
1968 Monza 140 Convertible 4 speed
1966 435 HP Crown
1986 Buick GN

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Aaron65 ()
Date: October 04, 2017 03:20PM

Great tip! I'll try it next summer on my spare carbs!

1965 Corvair Monza Convertible 95 4-sp.
1965 Buick Skylark
1965 Ford Mustang
1965 Dodge Dart 170 Wagon
1953 Buick Special Riviera
1963 Ford Thunderbird
1974 Pontiac Firebird Esprit

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: corventure Dave ()
Date: October 04, 2017 03:34PM

Thanks Bob. Good to have the numbers.thumbs up

Corventure Dave

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: BobV66Vair ()
Date: October 05, 2017 09:34AM

Brizo, does anyone flat sand the bottom of the carb to get better sealing there? Also, who uses the thicker bottom gaskets? I used the thin gaskets above and below the isolator.

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Date: October 05, 2017 12:41PM

Good presentation Dave - I do this with my carb rebuilds and have for some time. I know Steve does as well (we still get carbs from him as well)

Lon Wall

Fireman Oregon Coast Scenic Railroad #25 #2
OCSRR.com
Fireman Sumpter Valley Railroad #3 and #19
svry.com
www.pacificmodelloggerscongress.com

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Brizo ()
Date: October 06, 2017 10:11AM

BobV66Vair Wrote:
-------------------------------------------------------
> Brizo, does anyone flat sand the bottom of the
> carb to get better sealing there? Also, who uses
> the thicker bottom gaskets? I used the thin
> gaskets above and below the isolator.

Sure they sand the bottom, if its beat up or not perfectly straight. Using thin gaskets with the hard insulators is fine - it helps prevent small vacuum leaks. I have double insulators with gaskets under all the carbs on my 140 and a thermal air bleed valve on the balance tube to promote quicker hot-soak restarts.

Dan Brizendine,
'64 8door Greenbrier 140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Wrencher ()
Date: October 06, 2017 09:17PM

RTV = NoNo, never use RTV in carbs.

Hans

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Aaron65 ()
Date: October 07, 2017 05:02AM

I have double insulators with
> gaskets under all the carbs on my 140 and a
> thermal air bleed valve on the balance tube to
> promote quicker hot-soak restarts.

Dan, could you explain that thermal air bleed valve in a bit more detail?

1965 Corvair Monza Convertible 95 4-sp.
1965 Buick Skylark
1965 Ford Mustang
1965 Dodge Dart 170 Wagon
1953 Buick Special Riviera
1963 Ford Thunderbird
1974 Pontiac Firebird Esprit

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Brizo ()
Date: October 07, 2017 07:59AM

Aaron65 Wrote:
-------------------------------------------------------
> I have double insulators with
> > gaskets under all the carbs on my 140 and a
> > thermal air bleed valve on the balance tube to
> > promote quicker hot-soak restarts.
>
> Dan, could you explain that thermal air bleed
> valve in a bit more detail?


It's a 1 1/2" long steel block with a bi-metal strip that bows when hot to uncover a hole and let the engine suck in extra air under conditions when your engine may be slightly flooded. It can prevent a PG car from idling slower than normal or trying to die when dropped in gear after a hot restart. They were used often on V8s in the '50s and '60s screwed in the base of the carb. Mine is mounted above the edge of the fan opening with a hose to the balance pipe so that rising heat hits it after the engines shut down.

Dan Brizendine,
'64 8door Greenbrier 140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Aaron65 ()
Date: October 07, 2017 02:05PM

Brizo Wrote:
-------------------------------------------------------
> Aaron65 Wrote:
> --------------------------------------------------
> -----
> > I have double insulators with
> > > gaskets under all the carbs on my 140 and a
> > > thermal air bleed valve on the balance tube
> to
> > > promote quicker hot-soak restarts.
> >
> > Dan, could you explain that thermal air bleed
> > valve in a bit more detail?
>
>
> It's a 1 1/2" long steel block with a bi-metal
> strip that bows when hot to uncover a hole and let
> the engine suck in extra air under conditions when
> your engine may be slightly flooded. It can
> prevent a PG car from idling slower than normal or
> trying to die when dropped in gear after a hot
> restart. They were used often on V8s in the '50s
> and '60s screwed in the base of the carb. Mine is
> mounted above the edge of the fan opening with a
> hose to the balance pipe so that rising heat hits
> it after the engines shut down.

Thanks! Mine heat soaks more than I'd like (and more than my other old cars), so new ideas are always appreciated!

1965 Corvair Monza Convertible 95 4-sp.
1965 Buick Skylark
1965 Ford Mustang
1965 Dodge Dart 170 Wagon
1953 Buick Special Riviera
1963 Ford Thunderbird
1974 Pontiac Firebird Esprit



Edited 1 time(s). Last edit at 10/07/2017 02:06PM by Aaron65.

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: red monza ()
Date: October 08, 2017 05:54AM

Another tip....

Cleaning out passage ways...First, I am NOT a guitar player but I bought one to play with over the winter...I put new strings on and cut the excess off...and I thought, what can I use these ends for...yep...first thing was they would work GREAT on cleaning the passage ways on a carb...and on the 64 conv I bought last week, they un-stopped a jet that was 90% closed and a few other passage ways.

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: corventure Dave ()
Date: September 10, 2018 12:20PM

Seeing this question came up again recently. It looks like an annual bump is due.eye popping smiley

One can use the search. But here it is again anywho.spinning smiley sticking its tongue out

smileys with beer

Corventure

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: jjohnsonjo ()
Date: September 10, 2018 12:53PM

Geeez, I thought I remembered reading that somewhere before.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

Image and video hosting by TinyPic

Options: ReplyQuote
Re: Often overlooked on a carburetor rebuild...tip
Posted by: Timothy Shortle ()
Date: September 11, 2018 07:16AM

Great tips Dave. But perhaps it should be noted that this extra effort should only be done by those that take pride in their workmanship.
I know you do. I have seen your finished products.

Options: ReplyQuote
Pages: Previous12
Current Page: 2 of 2


Sorry, only registered users may post in this forum.
This forum powered by Phorum.