Will be installing the GDP 2 micron fuel filter setup this weekend and was wondering if I should use any type of sealent on the fittings? The instruction sheet didn't mention it. I recently installed my Oilguard system and it called for a liquid type sealent on all fittings, made me think when I read the instructions for the fuel filter. Thanks in advance, Mike

 

I didnt use any sealant when I did mine, but I ended up with 2 leaks. I re-tightened everything and one of the leaks stopped. I just got around to re-tightening again and all seems well. I was afraid to go too tight right off the get go, so I took it easy.

John

 

If they are NPT (pipe threads) you should use some sort of Pipe dope.. Pipe threads are tapered and need a lubricant to get them fully tightened..

For standard pipes where it doesn't matter if something gets in the pipe you can use a paste type pipe dope.. If it is important not to get anything in the pipe use a Teflon tape Sparingly..

On all of our gauges we use the Teflon tape.. on regular pipe joints we just use Teflon Pipe dope...

Gerry

 

teflon tape go two threads down on the fitting and you will be fine. now if you back them out for any reason make sure you clean out the threads in the joint left over tape so you dont push it back down into the fitting. the paste works good but alot of times it get's into the joint and you wash it thru. paste I go 4 threads back to were it seals tight

 

We are talking about fuel lines here, so cleanliness is important. I wouldnt use tape on these.

 

Don't use teflon tape anywhere near the fuel system. Shreads of the tape will find there way into your system and can and will cause failures. Like mentioned above it is just too risky to leave shreads from the last time and they get into the lines. Use the TFE paste instead.

 

Paste is more able to wash thru the line been using tape for over 35 years if you read you go two threads down you wont have a problem unless you dont know what way to wrap the tape

 

I agree, two threads down is the correct way to do it, but the problem comes in if you have to take it apart again. The old tape shreds and shards of tape can be pushed into the fuel system and cause problems.

In aircraft they will ground a plane if they find teflon tape used on the fuel system. It has caused many planes to loose their engines in flight. Not a good thing. It gets really busy in the cockpit when that happens.

To each his own.

 

Permatex #2 (non-hardening) has been used for many, many decades in the oil field to seal threads and flanged fittings against hydrocarbons. Yeah, it's "old school", but it works fine for me.

Rusty

 

As a retired airline pilot friend of mine who flew a Cessna 172 for "grins" used to tell me - "When the big fan in front stops, the pilot really starts sweating!!"

Rusty

 

Well the smart person when you take a part fittings with tape or what ever you use would clean out the tape sealent or what ever before installing again. there is no right or wrong way just be smart. FAA has rules because of dumb people there not smart enough to clean paste or tape out,

 

Try Loctite hydralic/pheumatic sealant. Been using it at work on high pressure systems and hasn't failed yet. Also non fouling.