Engine/Transmission (1998.5 - 2002) Thread sealing on FP Guage.

[JCyrbok]

Whats everyone out there using to seal the threads on the line for your FP Gauage? Teflon Tape seems like it would break down in diesel maybe.



Also anyone have any problems with the "Grease Gun" hose for a pressure sender line. It almost seems too good to be true, right size fittings, cheap etc.



Plus has anyone had to run a tap thru the 1/8 tapped head Banjos from Geno's? I did. Just wondering.



If all goes right FP will be working by Sat noon. Got the electical routed today after work and all I have to do is run the line to the sender and mount the gauage in the cubby hole in dash.



Thanks

J-

 

[illflem]

You're right about not using Teflon tape instead use anti-seize or Permatex #2. Check out the grease gun hose before you buy, some have straight 1/8'' ends instead of tapered and will leak. I highly recommend installing a $4 valve like this one first in line and run it most all the way closed to dampen pulsations and to shut things down if you ever have a leak.

 

[ToolManTimTaylor]

Hey bill what about the yellow thread tape for home heating oil connections. Home depot , lowes , and other big homestores have rolls of it for . 75 each.

 

[RSnaith]

I've been recommending a liquid teflon, such as LocTite PST to customers. This is good stuff, and doesn't require much to help with a good seal.

 

[illflem]

Tim, I've never used the gas type tape but the problem with any of the tape type sealers is if you ever have to remove a fitting to fix a leak or modify anything it is close to impossible to remove all the tape debris that can contaminate your system. You basically have to remove the entire added on system from your truck, clean with a wire brush and blow it out with compressed air. Don't want to think about what a small piece of tape could do to a pump or injector.



I spent several years fighting weeping type leaks on my farm gravity flow diesel tanks with many different types of thread sealers till I finally asked my fuel supplier what to use. He said they use anti-seize or Permatex #2, I did, problem solved.

 

[emjay]

My $0.02

Personally, I prefer Permatex #2. I have used it for years with nothing but success. If you do use teflon tape, make sure you don't apply the tape past the second to last thread (one thread up). Teflon is impervious to most anything. Permatex #2 should not be used for alcohol fuels, I think that's the only limitation.

 

[kaptn]

Yes the banjo fitting I received from GENO'S gave me fits trying to start the hose after fitting was installed. I read a few threads and heard a lot of people had this problem. It was getting dark and I needed my truck so I removed Banjo fitting and forced hose into fitting with to big wrenches basically cutting my own threads. Steel wins out over brass. (no tap). Other than that I have had good luck with GENO'S. My hose was made at work and my sending unit and hose screwed right into a pipe coupling,but not the banjo fitting.

 

[mediccummin]

Banjo's

Just installed my banjo's from geno's and yes i did have to tap out the 1/8npt, I just put a plug there for now, waiting for my pressure gauge etc. The plug would not even begin to thread, needed to be tapped all over again. Took awhile to get primed again to get truck started, any body else have this problem, I'm sure it is normal. Had to remove that plug to prime the line and get the air out. So far don't see any leaks. Impossible to get a torque wrench in there so I made them as close as I could by touch. Any body able to get a wrench in there must have a small set of hands any tiny wrench.

 

[kaptn]

The instructions with the sending unit said to turn pump on without starting several times. I started mine on the second attempt and it started instantly. I hope this is what you were asking?

 

[ToolManTimTaylor]

Rut ~ Roh Bill Guess who did use it

 

[MWBrooks]

Teflon tape is 100% compatible with diesel fuel. I have been a Union pipefitter for 17+ years and have seen my share of fuel oil piping. High density Teflon tape with an overlay of #5 Rectorseal will work everytime.





Mike

 

[dieselshu]

Fuel hose, etc

J, I prefer not to use teflon tape for the same reason illflem stated, plus I have found diesel will make teflon tape gummy. I use permatex #2 which states its ok to use with fuel. I also had to run a tap in the banjo fitting myself. How did your gaskets look, mine looked questionable as to new or used. I compared them with the ones I removed and they looked identical, I had purchased new ones from dealer for spares and installed them.

I made my own hose and used S/S aeroquip fittings and about 20 inches of hose, a needle valve from napa to isolate surges from the VP44. The sensor is mounted to the bracket that is next to the fuel filter. I like thew looks of the digital gauge and like you said the cubby hole was a great spot for it. Oo.

 

[JCyrbok]

gaskets

My banjo washers looked OK but I ALWAYS replace the banjo washers. They only cost like a dollar a piece and its good insurance against air in the line and diesel on the garage floor. I usually buy a couple of bags ( five to a bag) from CUmmins every now and then. Because like I always tell my wife "Its better to have it and not need it, than need it and not have it. " ( I'm a cop and that is usually refering to my off duty gun but works here too).



J-

 

[3dracer]

if you run the grease gun hose directly from the VP44, to the sender it will still pulse on the gauge. It ruined my sende in about 3 mths. I am going to put a needle valve on it and move to my canister to completely solve it...

 

[ToolManTimTaylor]

cumminszhere, Even the Yellow stuff? Cause thats what I used

 

[MWBrooks]

Tim,

The yellow tape is fine, no worries.



Another point I'd like to make is regarding pressure spikes damaging the gauges. Some are using a needle valve throttled down as a solution. This will work but isn't the best engineering practice. The best practice would be using a gauge "snubber". The snubbers are designed to minimize the shock of pressure fluctuations to the gauge. Having a shutoff valve in addition to the snubber would be ideal. The valve would only be used in the full on/off positions.





Mike