Sealing fuel pressure sensor threads

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Oct 1, 2014 | 02:14 PM

maroonls1z

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Sealing fuel pressure sensor threads

I have a flow through fitting for a pressure sensors and I'm having trouble getting it to seal and not leak. I've tried multiple brands of fitting and liquid ptfe thread sealant. Is there a ethanol resistant ptfe tape? If so who makes it and where can I find it? Outside of getting a new pressure sensor, which seams an expensive option, any other ideas? I'm only running 58psi

Oct 2, 2014 | 09:55 AM

Pacer Racer

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I have to install lines and fittings on fuel oil burners systems all the time I use something called Grip it's like a black Permatex types of sealant and is good for petroleum. I buy it at the local True Value Hardware store

Oct 2, 2014 | 01:24 PM

maroonls1z

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Problem is the system is for ethanol as well and don't want to use something that isn't ethanol resistant

Oct 2, 2014 | 08:37 PM

Pacer Racer

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I've never tried it with alcohol, but have used it with water, fuel oil, and LP gas. I've used it with as much as 300 PSI

Oct 7, 2014 | 04:00 PM

Sssnake

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I have the same issue and just picked up some permatex form a gasket #3. I'll keep you posted.

Oct 7, 2014 | 05:35 PM

maroonls1z

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That's what I used with no luck, I'm going to try oatey yellow gas line tape

Oct 11, 2014 | 04:20 PM

stevieturbo

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From: Norn Iron

I'm sure ptfe tape would have no issues with ethanol

Or PTFE paste.

Are you sure you're applying it and tightening it correctly ?

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Oct 11, 2014 | 06:10 PM

stevieturbo

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From: Norn Iron

If you're leaking that badly, you have bigger issues.

Are you sure you're even using the right threads for sensor and where it screws into ?

In theory they should seal with no additional sealant, although NPT threads are pretty ****.

Oct 12, 2014 | 06:03 AM

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maroonls1z

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That's what I figured as well, I mean it 1/8 npt and I'm not an idiot. I actually contacted the pressure manufacturer to see if it might be a defect but they refused to replace it and suggested tape instead of paste. I'll give it a try next week, I just removed it and ran a union as of now