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bigbulli
Samba Member
Joined: September 30, 2000
Posts: 575
Location: ENGLAND
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 Posted: Sun Jan 06, 2008 8:56 am Post subject: starting problem - air lock.... |
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Two weeks ago rebuilt the fuel pump and stripped and cleaned the carb. Ran good. Took it out today and ran good, left running for 15 mins, no probelms. When I tried to start it 30 mins later wouldnt start for love nor money. Checked points gap and spark, all good still didnt start . Took the fuel line off and got wife to turn over engine again (dont try this at home  ). Started straight up, wacked fuel line back and ran perfect. Starts first time everytime now!!! Is it possible to have an air lock? Does it sound like an air lock? maybe there was some blockage? What are your thoughts.
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1954 Barndoor
1955 Oval |
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bill may
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Joined: August 27, 2003
Posts: 14160
Location: san diego,ca
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EverettB 
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Joined: April 11, 2000
Posts: 69829
Location: Phoenix Metro
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| Posted: Sun Jan 06, 2008 10:06 am Post subject: |
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I've had that happen from 2 different things:
1. Air bubble in the fuel pump, I had to prime the fuel pump to get it going. This was immediately after a fuel pump rebuild though so it didn't work from the start.
2. Blockage at the gas tank outlet which would manifest only when the Bus sat for a while so all the junk sank to the bottom. Clean tank out, install new fuel sock, everything ok.
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bigbulli
Samba Member
Joined: September 30, 2000
Posts: 575
Location: ENGLAND
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| Posted: Sun Jan 06, 2008 2:37 pm Post subject: |
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Thanks guys, what do you mean by pre load diaphram and prime fuel pump?
many thanks
RIch
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1954 Barndoor
1955 Oval |
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EverettB
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bigbulli
Samba Member
Joined: September 30, 2000
Posts: 575
Location: ENGLAND
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| Posted: Sun Jan 06, 2008 3:17 pm Post subject: |
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| EverettB wrote: |
Pre-load:
There is a tool that sets the load on the pump while you assemble it.
More info here
http://www.thesamba.com/vw/forum/viewtopic.php?t=226300
By prime I mean I removed the outlet fuel line and let the fuel pump pump until fuel came out. This cleared the pump itself of any internal air bubbles. |
Thanks Everett I never new any of this! You learn something new everyday! Thanks again, Rich
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1954 Barndoor
1955 Oval |
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60 doubledoor
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Joined: September 19, 2009
Posts: 7
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| Posted: Sun May 09, 2010 8:20 am Post subject: 36 hp fuel pump |
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Thanks to everyone who has contributed to this thread. After beating me head against the 36 hp for a while now I finally have her runnin'. She's been sleeping for nearly 14 years. The homemade tool for assisting in the installation of the fuel pump diaphragm worked perfectly. Instantly a host of bizarre issues were resolved and the engine came to life. Soon the '60 doubledoor will be on the road.  |
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