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11-13-2019, 03:20 PM
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#1 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Fuel Check Valve
If I have a SBC Carbureted with a mechanical fuel pump I shouldn't need a fuel check valve right? The fuel pump acts as a check valve if it's working properly?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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11-13-2019, 03:31 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,515
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Re: Fuel Check Valve
Fuel pump should have two check valves. One on the inlet, one on the outlet.
You don’t need another one. |
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11-13-2019, 04:31 PM
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#3 |
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Moderator
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Fuel Check Valve
Thank you for verifying that. I have a friend who installed a check valve (plastic) thinks he needs a check valve as he's loosing fuel (according to him) and it starts right up now that he has a check valve. I told him he has a fuel pump problem, but what do I know?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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11-13-2019, 06:07 PM
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#4 | |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 2,879
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Re: Fuel Check Valve
Quote:
The inlet valve in the pump will go 'the other way' if the pressure exceeds a certain threshold so as to prevent fluid lock. According to my new youtube education anyways LOL -klb
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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