Scott B Posted March 8 Share Posted March 8 Hello Everyone, I have recently become the proud owner of a 1934 RHD Series 50 (the previous owner wasn't sure) in the UK. The previous owner said that it has an intermittent fuel issue causing it to cut out so keen to resolve so I can enjoy the car. I have never seen a vacuum system before & there isn't any local knowledge here so reaching out to yourselves for guidance on this issue & we're to source parts from in general. Link to comment Share on other sites More sharing options...
Mark Shaw Posted March 8 Share Posted March 8 Your car does not have a vacuum fuel pump. It has a mechanical diaphragm pump driven off the cam shaft. Follow the fuel line from the carburetor to locate the fuel pump. Disconnect it from the carburetor, place the rubber hose in a container, and crank the engine with the ignition off to see if it is working. 3 Link to comment Share on other sites More sharing options...
Grimy Posted March 8 Share Posted March 8 20 minutes ago, Mark Shaw said: Your car does not have a vacuum fuel pump. It has a mechanical diaphragm pump driven off the cam shaft. Follow the fuel line from the carburetor to locate the fuel pump. Disconnect it from the carburetor, place the rubber hose in a container, and crank the engine with the ignition off to see if it is working. Yes indeed, the mechanical fuel pump is at the right rear of the engine. That car does have vacuum-assisted brakes with a large canister underneath the car on the left side. Leaks from the vacuum line leading from the rear of the intake manifold to the canister or from its internal diaphragm will cause an excessively lean condition. 1 Link to comment Share on other sites More sharing options...
Scott B Posted March 8 Author Share Posted March 8 Guys, big thank you to both of you! Really helpful. I will start with taking the pipe off & cranking & then work my way through the filter & carb. Does the set up look original? I am assuming this is a series 50 but not sure? Link to comment Share on other sites More sharing options...
Oldtech Posted March 8 Share Posted March 8 You should have a tag on the firewall. But yes, the engine looks 50 series. Higher models have a pipe on top of the engine for the top radiator connection. Link to comment Share on other sites More sharing options...
BuickTom87 Posted March 8 Share Posted March 8 My guess carb and fuel pump can use a rebuild as well Link to comment Share on other sites More sharing options...
1939_Buick Posted March 8 Share Posted March 8 (edited) 1934 series 40 117" wheel base 1934 series 50 119" wheel base 1934 series 60 128" wheel base The other thread https://forums.aaca.org/topic/412378-all-help-gratefully-received-in-the-uk/#comment-2654681 Image is from 2022. Was a time when those colors were popular. When made 90%sure were only 1 color. If new in UK in 1934 possible was ex Canada McLaughlin Buick Edited March 8 by 1939_Buick (see edit history) Link to comment Share on other sites More sharing options...
Larry Schramm Posted March 9 Share Posted March 9 (edited) See your other thread/post. It looks like you need to start on your car by cleaning out the fuel system. Look at your picture of the fuel pump & sediment bowl. Edited March 9 by Larry Schramm (see edit history) 1 Link to comment Share on other sites More sharing options...
Scott B Posted March 9 Author Share Posted March 9 Agreed Larry! Full fuel system clean out before it goes any where near a road. The sunroof has been leaking so am removing the seats this weekend, cleaning off mould & starting to dry everything out. Link to comment Share on other sites More sharing options...
1939_Buick Posted March 10 Share Posted March 10 (edited) In the last ~90 years any AC fuel pump that fitted could/would have been installed when the original failed, as they all do eventually. The rocker arm of the "new" fuel pump may be different to the original. AC fuel pump images (from internet). Not model specific Edited March 10 by 1939_Buick (see edit history) 2 1 Link to comment Share on other sites More sharing options...
Grimy Posted March 10 Share Posted March 10 1 hour ago, 1939_Buick said: In the last ~90 years any AC fuel pump that fitted could/would have been installed when the original failed, as they all do eventually. The rocker arm of the "new" fuel pump may be different to the original. And that may well be the cause of inadequate fuel supply.... Link to comment Share on other sites More sharing options...
Scott B Posted March 10 Author Share Posted March 10 Thanks both. I think I will get a rebuild kit from Bob's autos on order. Hopefully there will be some common parts. 1 Link to comment Share on other sites More sharing options...
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