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stevethelawyer
Freshman Member
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I am constantly re-filling dashpot in the carb to make the auto choke work. Is there a gasket or o-ring that needs replacement?
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auto choke fluid leak
- Thread starter stevethelawyer
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kennypinkerton
Yoda
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dashpot and auto choke are 2 different parts of the carb, but yes. There's an oring... and/or a diaphram that may need replaced. What year is your car?
Oh, and welcome to the forums!
Oh, and welcome to the forums!
tony barnhill
Great Pumpkin - R.I.P
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Yes, & there's also a rubber gasket around the bottom of the piston
OP
stevethelawyer
Freshman Member
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thanks for the response and the welcome. I have a 78 mgb that runs great with about 90,000 miles on it. I'll post a pic soon.
OP
stevethelawyer
Freshman Member
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Any idea from whom I would purchase the necessary parts?
jlaird
Great Pumpkin
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https://www.theautoist.com Takes a bit of time but good prices and one of our own.
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Moss Motors, Victoria British, Joe Curto, Inc., a number of others. Google is your friend. /ubbthreads/images/graemlins/wink.gif
To *really* check the rubber diaphragm in the carb, you should hold it up to a light source (nice bright sky works well enuff) and stretch it slightly as you look for pinholes, ruptures, etc. The O-ring referred to is a seal at the top of the needle in the piston, quite tiny and PRONE to hardening and deterioration. Your damper oil is being sucked past it. A good "first step" is to get a good manual for the car, read the thing and acquire the tool made for the removal/adjustment of the needle in that piston.
As for the "fluid leak," the choke mechanism is a devilish device, thrown onto an otherwise fairly well engineered carb to make driver responsibility for manually adjusting the mixture "obsolete." IMO it's just an added gizmo bound to fail or leak coolant. It can be replaced with a manual "kit" and the problematic "lump" of a bi-metal afterthought can be binned. It's a matter of personal choice but I kinda like "simplicity" over automated convenience. Especially in an LBC. They're quirky enough without engineering in other potential problems.
Welcome to the BCF! Good luck and report back!
To *really* check the rubber diaphragm in the carb, you should hold it up to a light source (nice bright sky works well enuff) and stretch it slightly as you look for pinholes, ruptures, etc. The O-ring referred to is a seal at the top of the needle in the piston, quite tiny and PRONE to hardening and deterioration. Your damper oil is being sucked past it. A good "first step" is to get a good manual for the car, read the thing and acquire the tool made for the removal/adjustment of the needle in that piston.
As for the "fluid leak," the choke mechanism is a devilish device, thrown onto an otherwise fairly well engineered carb to make driver responsibility for manually adjusting the mixture "obsolete." IMO it's just an added gizmo bound to fail or leak coolant. It can be replaced with a manual "kit" and the problematic "lump" of a bi-metal afterthought can be binned. It's a matter of personal choice but I kinda like "simplicity" over automated convenience. Especially in an LBC. They're quirky enough without engineering in other potential problems.
Welcome to the BCF! Good luck and report back!
tony barnhill
Great Pumpkin - R.I.P
Offline
Doc & I will never grow up!