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Fuel line check valve

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Old Jun 21, 2025 | 03:13 PM
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Default Fuel line check valve
Is the fuel line check valve located in the fuel pump of a 1997 C5 or is it located somewhere in the fuel line?
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Old Jun 24, 2025 | 09:27 PM
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Moved to C5 Tech.
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Old Jun 24, 2025 | 10:31 PM
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There are a few check valves - located in the main pump assy and the pass side jet pump assy
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Old Jun 26, 2025 | 06:59 PM
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Do the fuel tanks have to be dropped in order to replace the fuel line with the fuel check valve in it?
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Old Jun 26, 2025 | 07:07 PM
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Originally Posted by tdoriausername
Do the fuel tanks have to be dropped in order to replace the fuel line with the fuel check valve in it?
yes. And the fuel lines arent where the check valves are
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Old Jun 26, 2025 | 07:13 PM
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Thanks, I was thinking that a stuck half open or half closed check valve was causing my fuel pump to whine after long drives (It's pretty loud) but I'm not willing to drop the tanks just to replace the check valve on a whim that it might cure the noise. I guess I'll just have to live with the noise and turn up the radio.
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Old Jul 2, 2025 | 02:49 PM
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So if the check valves are in the fuel lines, where are they?
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Old Jul 2, 2025 | 02:58 PM
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Originally Posted by tdoriausername
So if the check valves are in the fuel lines, where are they?
I dont believe they are. The check valves should be integrated in the fuel pump assemblies. To prevent tank equalization / easier & faster engine starting
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Old Jul 2, 2025 | 04:23 PM
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Originally Posted by don37
I dont believe they are. The check valves should be integrated in the fuel pump assemblies. To prevent tank equalization / easier & faster engine starting
Sometimes what we believe is not always true, or applicable to all years.

Like this example before FFS....


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Old Jul 2, 2025 | 05:31 PM
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Originally Posted by lucky131969
Sometimes what we believe is not always true, or applicable to all years.

Like this example before FFS....

i too ran into that jpeg online. When i glanced at it i remember thinking it was not oem. I have done several sensor swaps on my 50th anniversary z06 and a few on my zr1. My life got way easier never going below 1\8th tank if i could help it and also staying away from the fuel company that uses much techroline..... shell and petro canada have been no problem. Knock on wood lol. Dont want to jinx it
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