Help sealing fuel fittings

[btoscano]

I installed a hollow banjo bolt, 45 elbow, and Westach sending unit for a fuel pressure gauge. I tightened the sending unit good but it still weeps fuel. I am concerned about tightening these fittings too tight and causing them to seize together. Is there some type of sealer compound or other technique I could use? For example, I notice that the quick disconnect fitting in the lift pump was previously treated with something red.



Thanks,

Brian

 

[bgilbert]

The banjo bolt will require a sealing washer. Then just use teflon tape or liquid teflon for the rest.

 

[btoscano]

The banjo bolt is not the problem, those got new washers.



The teflon does not degrade with the diesel fuel???



Life really can be simple if you want it to be!

 

[JLEONARD]

You can use teflon tape but there is a special tape for diesel fuel. Never used it but I have used regular teflon tape many, many times for diesel fuel lines in my boat. . never had a problem from the tape.

Leave the first 2 threads bare as you would with hydraulic fittings and you should be ok.

You can also use an epoxy on the threads. They absolutely will not leak or loosen then.

 

[bgilbert]

I too have used liquid teflon for years on diesels with no issues.

 

[btoscano]

The local shop never head of yellow teflon so I opted to use Permatex #2 non-hardening thread sealer. The package specifically says its good for diesel. No immediate leaks, hopefully it will hold up.



Brian

 

[RustyJC]

Permatex #2 non-hardening has been used in the oil field to seal threaded and flanged fittings against hydrocarbons for many decades. I use it on all of my threaded fittings with no problems.



Rusty