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Thread: schrader valve ??
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09-04-2015, 06:38 AM #1
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- 11,759
Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
schrader valve ??
Installing the fuel pressure gauge and do I need to remove the schrader valve off the fuel rails? Instructions don't say either way....
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09-04-2015, 12:58 PM #2
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09-04-2015, 01:32 PM #3
- Join Date
- Aug 1999
- Location
- Arizona
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- 51,364
Black- 383 Procharged & N20 Vert
You need to remove it.
Black 1999 Blown Convertible A4
Forged 383 | ATI D-1SC
NX MAF Kit | 222/226 .585 115
AS Stage II 6.0L FI Heads
Moser 9" | 3.70 | Wavetrac | 35 Spline | Vigilante 3600
548.0 RWHP - 563.8 RWTQ - 10# - D1
666.0 RWHP - 734.2 RWTQ - 125 Shot - P1
Black 2009 Escalade Hybrid 4WD
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09-04-2015, 01:50 PM #4
Exactly, just make sure you have released any pressure from the rail by carefully depressing the valve on a cold engine while stuffing a big rag up against it. Once you are sure you aren't going to take a gasoline bath, use a valve stem tool to remove the schrader valve and stash it and the cap away somewhere in case you ever want to remove the gauge. Wrap the threads on the gauge with several warps of teflon tape then gently install. The real trick is to get the gauge fully tight or very close to fully tight and oriented in the right direction. You may have to try a time or two to get it just right. Do not overtighten it or you will strip the threads on one part or the other or damage the gauge and cause a fuel leak.
There have been some reports of the gauges leaking. Hopefully you bought a good quality gauge if you are going to leave it on the engine. My guess is the failed gauges were of the cheap eBay from China variety.
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09-04-2015, 07:33 PM #5
Installed a manual gauge on both my TA and truck. I removed the Schrader valve on both vehicles. I've had zero issues. With the valve in place, the gauge won't work. The valve holds the pressure inside the fuel line.
1998 Pontiac TA, stock heads, FAST 90, FAST 90 TB, FLP LT, off road y-pipe with cat delete, flow master muffler, comp cams 54-457-11 223/231-610/617-112 LSA, Pro charger D1SC with FMIC @ 8psi, FROST tune, VIG 3200 stall, built 4l60e, snow meth kit, MOSER 12 bolt 373 gears, Derale 13900 trans cooler.
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09-05-2015, 01:39 AM #6
- Join Date
- Apr 2011
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- Johnstown,PA
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- 54
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- 1,104
Silver- 1999 Trans-Am, 2012 Sonic
Lock tight makes a tread salient just for fuel lines and such. Read reports that the tape will break down and either leak or get in the fuel line causing problems with the Guage or a injector. Tape is mostly for plumbing. You can get it at any auto parts, just let it dry a little before starting motor.
99 Trans Am, SLP Lid, Blackwing filter, smooth bellow, Ported TB, LS6 intake, Ws6 lower ram air box, OBX LT's, Magna Flow cat back, LS7 clutch, Tick MC, Hurst Shifter, Frost Tune, UMI SFC,LAC, STB, PB, Torq Arm, Super Hawk hood, Torq Thrust II, Kee Audio.
Strange S60 4:10's, D&S Rotors, S/S Brake Lines.
Nitto NT05R Track Tire's, 12.7 @ 108 / 1.82 60'
Wish list.
Coil overs, Heads & Cam
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09-05-2015, 04:38 AM #7
I think I utilized a thread sealing paste on ours that was rated for gasoline and such.
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09-08-2015, 08:51 AM #8
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- Feb 2009
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- 11,759
Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Well after checking all the parts stores looking for "yellow" Teflon tape found it at Lowe's and Home Depot plumbing sections.
To no surprise none of the parts clerks knew what I was talking about.
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09-08-2015, 02:22 PM #9
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09-08-2015, 04:16 PM #10
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Steve don't feel back I didn't know either. Glad I asked.
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09-10-2015, 08:48 AM #11
- Join Date
- Apr 2011
- Location
- Johnstown,PA
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- 54
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- 1,104
Silver- 1999 Trans-Am, 2012 Sonic
This is the stuff I used worked very well. http://www.permatex.com/component/do...ket=automotive
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