Fuel Pressure Gauge installation.
Thread Starter
Staging Lane
Joined: May 2016
Posts: 62
Likes: 0
From: Tampa FL.
Fuel Pressure Gauge installation. So I bought a fuel pressure gauge to connect to my fuel rail and I tried putting it on as is and all I got was a bath of 93 octane. 
So I need some type of sealant that can go in between the threaded components of the gauge and the adapter that comes with it. What do you guys recommend?
So I need some type of sealant that can go in between the threaded components of the gauge and the adapter that comes with it. What do you guys recommend? 
So I bought a fuel pressure gauge to connect to my fuel rail and I tried putting it on as is and all I got was a bath of 93 octane. So I need some type of sealant that can go in between the threaded components of the gauge and the adapter that comes with it. What do you guys recommend?
So I need some type of sealant that can go in between the threaded components of the gauge and the adapter that comes with it. What do you guys recommend?That's odd. Adapter should fit & seal over the swage fitting. Adapter should also have the tab to depress the plunger in the fitting. It's not a good idea to use a high pressure fuel line fitting that does not self seal.
Thread Starter
Staging Lane
Joined: May 2016
Posts: 62
Likes: 0
From: Tampa FL.
That's the kit I bought, and it says to use Teflon tape to seal it, but doesn't Teflon tape get eaten up by fuel?
http://www.ebay.com/itm/98-02-PONTIA...FDThnA&vxp=mtr
That's the kit I bought, and it says to use Teflon tape to seal it, but doesn't Teflon tape get eaten up by fuel?
That's the kit I bought, and it says to use Teflon tape to seal it, but doesn't Teflon tape get eaten up by fuel?
Thread Starter
Staging Lane
Joined: May 2016
Posts: 62
Likes: 0
From: Tampa FL.
How to choose thread sealant for fuel applications
To choose the appropriate thread sealant, look for it's chemical resistance to fuel (diesel or gasoline) or oil running through the line. Backyard mechanics will tell you they've used regular old gas resistant teflon tape (yellow stuff) with success. This is not recommended because it risks breaking free. Liquid or paste type thread sealants are kinder to sensitive components down stream. Mechanics repairing injectors, fuel pumps and carburetors can tell you first hand it is not uncommon to trace fault in the fuel component to clogging from a piece of teflon tape that washed off the ends of the threads, clogging in the first tiny micron orifice it encounters, if not the fuel pump then an injector or carburetor gallery. Either way it's a costly repair. Liquid or paste type sealant won't clog. For gasoline, regular old gasoline resistant Aviation Form-a-gasket Number 3 is the best option. Another product also offered by Permatex is the High Temperature Thread Sealant. Tech data on this sealant says it has medium solvent resistance and is recommended for fuel sender type applications. With the advent of ethanol present in modern gasoline, I favor Form-a-gasket No. 3 which specifically states solvent resistance to gasoline, especially on modern engines that use injectors rather than carburetors such as the E-TEC and HPDI (high pressure direct injection) and any diesel engine.
To choose the appropriate thread sealant, look for it's chemical resistance to fuel (diesel or gasoline) or oil running through the line. Backyard mechanics will tell you they've used regular old gas resistant teflon tape (yellow stuff) with success. This is not recommended because it risks breaking free. Liquid or paste type thread sealants are kinder to sensitive components down stream. Mechanics repairing injectors, fuel pumps and carburetors can tell you first hand it is not uncommon to trace fault in the fuel component to clogging from a piece of teflon tape that washed off the ends of the threads, clogging in the first tiny micron orifice it encounters, if not the fuel pump then an injector or carburetor gallery. Either way it's a costly repair. Liquid or paste type sealant won't clog. For gasoline, regular old gasoline resistant Aviation Form-a-gasket Number 3 is the best option. Another product also offered by Permatex is the High Temperature Thread Sealant. Tech data on this sealant says it has medium solvent resistance and is recommended for fuel sender type applications. With the advent of ethanol present in modern gasoline, I favor Form-a-gasket No. 3 which specifically states solvent resistance to gasoline, especially on modern engines that use injectors rather than carburetors such as the E-TEC and HPDI (high pressure direct injection) and any diesel engine.
http://www.ebay.com/itm/98-02-PONTIA...FDThnA&vxp=mtr
That's the kit I bought, and it says to use Teflon tape to seal it, but doesn't Teflon tape get eaten up by fuel?
That's the kit I bought, and it says to use Teflon tape to seal it, but doesn't Teflon tape get eaten up by fuel?
