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Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

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Old 08-14-2006, 10:27 PM   #1
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Location: Warner Robins
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Car: 78 Z28,91 Rs,99 formula(dont tell)
Engine: 350,3.1,LS1

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Oil Bypass Valve

Does anyone know any thing about a oil bypass valve that goes in the oil filter housing on a 91 3.1 RS? What does it do? Do you need it installed?
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Old 08-14-2006, 10:29 PM   #2
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Car: 1984 Z28 Hardtop / 1988 IROC T-top
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It lets unfiltered oil bypass the filter if the pressure drop in the filter is too high, like if it was badly clogged. If you leave it out, you'll have unfiltered oil circulating through your engine all the time.
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Old 08-14-2006, 10:48 PM   #3
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Car: 78 Z28,91 Rs,99 formula(dont tell)
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it fell out during the last oil change, but i got a replacement, any tips on installing it? does it use a screen to filter or what? thanks
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Old 08-14-2006, 10:48 PM
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