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#620372 - 10/29/09 05:25 PM '71 MGB charcoal filter problem
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Hi Gals and Guys...I'm at the point of first attempt at starting this car in 18 years! Fuel flows just fine and POURS out the large hose on the bottom of the charcoal canister. I don't understand that system so what's up?? Can I connect the two hard lines that run into it with fuel hose and just bypass the canister? Thanks for any help.
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

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#620389 - 10/29/09 06:51 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
DrEntropy Offline
Great Pumpkin

Registered: 09/15/05
Posts: 25672
Loc: Elsinore, DK
YIKES!!

First thing I'd be doin' is a carb rebuild. Viton tipped float needle and a good goin' thru of the ports and passages in the body of the beast.
_________________________
'64 MGB
'67 Lotus Elan S-3 DHC
'69 Lotus Elan +2
'78 Alfa Romeo Spider-current Daily: O=\*/=O
'84 300D Turbo:"Diesela"-SWMBO's Daily: OO|#|OO
'66 Alfa Romeo GT - Upscale Yard Art: Oo=\*/=oO
Hey! I LOVE my wife... She brings me KIPPERS!

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#620391 - 10/29/09 06:54 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
tony barnhill Offline
Greatest Pumpkin Ever!
Great Pumpkin

Registered: 11/16/02
Posts: 25084
Loc: Gurley, Alabama, USA
& after the carb rebuild, go here to see how to rebuild your charcoal cannister: http://www.theautoist.com/carboncannister.htm
_________________________
Tony "theAutoist" Barnhill


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#620394 - 10/29/09 07:06 PM Re: '71 MGB charcoal filter problem [Re: tony barnhill]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Thanks a lot guys...I REALLY didn't want to hear about rebuilding carbs since I'm not much of a mechanic. Guess I'll have to learn, huh? Is there any short explainatiion of why the fuel runs out that large hose? Just curious. smile
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

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#620395 - 10/29/09 07:07 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
tony barnhill Offline
Greatest Pumpkin Ever!
Great Pumpkin

Registered: 11/16/02
Posts: 25084
Loc: Gurley, Alabama, USA
Float not working correctly could be one reason.
_________________________
Tony "theAutoist" Barnhill


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#620401 - 10/29/09 07:25 PM Re: '71 MGB charcoal filter problem [Re: tony barnhill]
DrEntropy Offline
Great Pumpkin

Registered: 09/15/05
Posts: 25672
Loc: Elsinore, DK
Short answer: "CRUD" in the float needle.

Long answer: If the float needle/seat is compromised, it's likely the rest of the carb has build-up as well.

The unit isn't nearly as complex as it may seem. A good carb kit and some patience will have it as good as new. It ain't magic! If you can fix a leaky faucet it'll be a learning experience. It's hung out there and easy to get to. No intimidation!

Chase Tony's link about the canister after you've been thru the rebuild.

Here's intimidation for ya:


Attachments
V12_1.jpg


_________________________
'64 MGB
'67 Lotus Elan S-3 DHC
'69 Lotus Elan +2
'78 Alfa Romeo Spider-current Daily: O=\*/=O
'84 300D Turbo:"Diesela"-SWMBO's Daily: OO|#|OO
'66 Alfa Romeo GT - Upscale Yard Art: Oo=\*/=oO
Hey! I LOVE my wife... She brings me KIPPERS!

Top
#620402 - 10/29/09 07:27 PM Re: '71 MGB charcoal filter problem [Re: tony barnhill]
BoneIdle Offline
Jedi Trainee

Registered: 12/10/05
Posts: 236
Loc: Winona Lake, IN
Quick check, assuming the carbs are SU and not something else, would be the floats. If they're HS's, you might get away with checking them on the vehicle, but you'd really be better off to take them out, slap them on your favorite bench, and go through them.

They're not really complex devices and actually, except for removal and installation, working on SU's is kind of therapeutic. Now, a Quadrajet, that's a different story...

18 years of non-operation really demands some pre-ignition maintenance or you might end up running for the marshmallows and coat hangers while waiting for the fire department to arrive.

Points, plugs, carbs, heater control valve ( right Doc?), brake and clutch "reservoirs", handbrake,radiator, weird looking, taped up wiring...all of these (and more)need to be scrutinized before you turn the switch the first time. You'll be much happier that way.
_________________________
Garry - Overlord of Sarussokenubi VIII

Three cheers for the Sun god!
He's such a fun god!
Ra! Ra! Ra!

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#620404 - 10/29/09 07:33 PM Re: '71 MGB charcoal filter problem [Re: BoneIdle]
DrEntropy Offline
Great Pumpkin

Registered: 09/15/05
Posts: 25672
Loc: Elsinore, DK
lol

All true and correct! The heater control is a source of consternation due to its proclivity to LEAK and drip onto the dizzy, offering a great ground path for the HV.

Likely not the actual issue in this case but another niggling little detail to pay attention to!
_________________________
'64 MGB
'67 Lotus Elan S-3 DHC
'69 Lotus Elan +2
'78 Alfa Romeo Spider-current Daily: O=\*/=O
'84 300D Turbo:"Diesela"-SWMBO's Daily: OO|#|OO
'66 Alfa Romeo GT - Upscale Yard Art: Oo=\*/=oO
Hey! I LOVE my wife... She brings me KIPPERS!

Top
#620406 - 10/29/09 07:36 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
BoneIdle Offline
Jedi Trainee

Registered: 12/10/05
Posts: 236
Loc: Winona Lake, IN
Yeah.I was thinking more of the inevitable discouragement that occurs when he corrects the float problem and the thing still won't start. Might as well eliminate the possibility before it rears its ugly little, corroded head :))

BTW, Doc, what is that in the photo? I can't make out enough to ID. It looks like some sort of V-n engine.


Edited by BoneIdle (10/29/09 07:39 PM)
_________________________
Garry - Overlord of Sarussokenubi VIII

Three cheers for the Sun god!
He's such a fun god!
Ra! Ra! Ra!

Top
#620408 - 10/29/09 07:46 PM Re: '71 MGB charcoal filter problem [Re: BoneIdle]
DrEntropy Offline
Great Pumpkin

Registered: 09/15/05
Posts: 25672
Loc: Elsinore, DK
Point taken. wave
_________________________
'64 MGB
'67 Lotus Elan S-3 DHC
'69 Lotus Elan +2
'78 Alfa Romeo Spider-current Daily: O=\*/=O
'84 300D Turbo:"Diesela"-SWMBO's Daily: OO|#|OO
'66 Alfa Romeo GT - Upscale Yard Art: Oo=\*/=oO
Hey! I LOVE my wife... She brings me KIPPERS!

Top
#620416 - 10/29/09 08:05 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Sounds like something I can do...Thanks. I still don't understand why a messed up couple of carbs would cause fuel to come out the canister hose! smile
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

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#620417 - 10/29/09 08:08 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
BoneIdle Offline
Jedi Trainee

Registered: 12/10/05
Posts: 236
Loc: Winona Lake, IN
If the floats are stuck open, gas goes through the overflow tubes, and everywhere else, trying to escape its confinement. The fuel pump just keeps pumping. It can be a mess. I've had it happen. I can't remember exactly how the evaporative circuit goes, but I do know it's hooked into the carbs, at least it is on my 1974 GT


Edited by BoneIdle (10/29/09 08:09 PM)
_________________________
Garry - Overlord of Sarussokenubi VIII

Three cheers for the Sun god!
He's such a fun god!
Ra! Ra! Ra!

Top
#620421 - 10/29/09 08:14 PM Re: '71 MGB charcoal filter problem [Re: BoneIdle]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Thanks...I'll order a carb rebuild kit!!
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

Top
#620426 - 10/29/09 08:27 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
BoneIdle Offline
Jedi Trainee

Registered: 12/10/05
Posts: 236
Loc: Winona Lake, IN
You might want to disassemble and clean everything before you order, so you can determine if you need parts not included in a rebuild kit. Then, if it were me, I'd call Joe Curto, or someone like him to make sure I get the correct parts for your particular carbs.Just a thought.
_________________________
Garry - Overlord of Sarussokenubi VIII

Three cheers for the Sun god!
He's such a fun god!
Ra! Ra! Ra!

Top
#620430 - 10/29/09 08:48 PM Re: '71 MGB charcoal filter problem [Re: BoneIdle]
DrEntropy Offline
Great Pumpkin

Registered: 09/15/05
Posts: 25672
Loc: Elsinore, DK
A well thought thought, actually. Some "kits" come with less than what's needed.
_________________________
'64 MGB
'67 Lotus Elan S-3 DHC
'69 Lotus Elan +2
'78 Alfa Romeo Spider-current Daily: O=\*/=O
'84 300D Turbo:"Diesela"-SWMBO's Daily: OO|#|OO
'66 Alfa Romeo GT - Upscale Yard Art: Oo=\*/=oO
Hey! I LOVE my wife... She brings me KIPPERS!

Top
#620431 - 10/29/09 08:51 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Thanks...I'll do that. So who's Joe Curto?
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

Top
#620432 - 10/29/09 08:52 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
BoneIdle Offline
Jedi Trainee

Registered: 12/10/05
Posts: 236
Loc: Winona Lake, IN
In old country, I have good teacher of maintenances. :))

Joe Curto specializes in SU parts ( Zenith-Stromberg, as well, I think)

He'll turn up on Google.



Edited by BoneIdle (10/29/09 08:54 PM)
_________________________
Garry - Overlord of Sarussokenubi VIII

Three cheers for the Sun god!
He's such a fun god!
Ra! Ra! Ra!

Top
#620433 - 10/29/09 08:55 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
BTW Doc...what is the dizzy and the HV that the heater may leak onto??
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

Top
#620434 - 10/29/09 08:55 PM Re: '71 MGB charcoal filter problem [Re: DrEntropy]
tony barnhill Offline
Greatest Pumpkin Ever!
Great Pumpkin

Registered: 11/16/02
Posts: 25084
Loc: Gurley, Alabama, USA
Another thing you can do is buy a couple of cans of carb cleaner & spray off the outsides to include all the linkage......then spray out the insides real good....let it dry & try to start it again....but, don't let it run long enough to dump fuel in the cannister.

Turn the ignition on & listen for the fuel pump's "click-click".....it should stop within half a minute or so if it can pressurize the system....if it never stops clicking, turn the key off.

Let us know `what happens.
_________________________
Tony "theAutoist" Barnhill


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#620435 - 10/29/09 08:55 PM Re: '71 MGB charcoal filter problem [Re: GaryBeu]
GaryBeu Offline
Jedi Hopeful

Registered: 10/03/09
Posts: 170
Loc: Kentucky, USA
Thanks Boneidle
_________________________
Gary and Carla Beu
Edmonson County, KY

1971 MGB "Ellie" (should be a driver by March 2010)
1995 Ford F-250 4WD (farm truck)

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