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[Schurkey]

If you must use teflon tape there or on an oil pressure sending unit, use the yellow hydrocarbon rated stuff.

Teflon tape is Teflon tape. It's "all" rated for hydrocarbon use. Teflon (PTFE) is essentially inert around most chemicals.

Different brands produce/sell it in different colors; which within each brand may or may not have some sort of meaning.

The yellow stuff is thicker than the typical very-thin white stuff. Takes fewer wraps to fill the space between pipe threads which tend to be very coarse. The yellow stuff--being thicker--is therefore somewhat easier to apply.

 

[Caman96]

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Flex Seal

 

[xXxPARAGONxXx]

I'm looking around the net, and curious --- is this fill tube needed? I see a lot of engine photos, and some just have a screw-on-cap on the valve cover. Where does the fill tube go?

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[Caman96]

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Driver side valve cover.

 

[fancyTBI]

Seems like it’s needed on the Vortec motors for access to fill it. TBI, not needed.

 

[Supercharged111]

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Driver side valve cover.

That's only if you're a square and don't have a Whipple.

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[Orpedcrow]

I'm looking around the net, and curious --- is this fill tube needed? I see a lot of engine photos, and some just have a screw-on-cap on the valve cover. Where does the fill tube go?

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Same spot, same threads as the cap.

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[Caman96]

That's only if you're a square and don't have a Whipple.

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Sometimes less is more.

 

[SNCTMPL]

Sometimes less is more.

But not when it comes to boost.

 

[Supercharged111]

Sometimes less is more.

And sometimes more is more.