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83 AMC Eagle return fuel check valve replacement.

Started by The OLD Man, July 03, 2024, 02:11:19 PM

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The OLD Man

July 03, 2024, 02:11:19 PM
I was able to purchase a 4an size fuel return check valve from Improved Racing to replace one hidden in hose. The valve has a .04 crack pressure. Seems to be working fine. Can be ordered with barbed fittings.


https://www.improvedracing.com/high-flow-low-cracking-pressure-flapper-check-valve-6.html

KootenayKev

#1
March 19, 2025, 05:17:46 PM
Can I ask what problems this eliminates? I read earlier today the return line can siphon the carb while sitting? Can it interfere while driving? Say up a steep grade for example?

89 MJ

#2
March 19, 2025, 07:42:32 PM
Quote from: KootenayKev on March 19, 2025, 05:17:46 PMCan I ask what problems this eliminates? I read earlier today the return line can siphon the carb while sitting? Can it interfere while driving? Say up a steep grade for example?
Not to my knowledge, but I've got a different carburetor. I got rid of the fuel line check valve and the line won't siphon the carb dry even after a week of sitting. My car is wheeled on steep grades and driven up steep hills on the road, completely fine.
1986 Eagle: 258, Auto, Chrysler 8.25 rear, 3.54 gears
1989 Jeep Comanche: 4.0, AX-15, 8.8 rear, 4.10 gears
1940 Chevy PU: 350, 700R4

vangremlin

#3
March 20, 2025, 11:38:10 AM
If anyone is looking for one, I found these one ebay, for use with regular fuel hose

https://www.ebay.com/itm/314315356308
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold
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