Is a valve cover breather bad for the 4.6????

96_4.6 · 08-13-2003, 01:16 PM

I was going to take out the long plastic tube that goes from the valve cover across the engine and into the cold air induction and plug the hole on the cold air induction and put a valve cover breather in the valve cover. Reason being out of nowhere the guy across the street who has lived there for 5 years and I've never talked to him came across the street when I was installing my spacer and havin a small problem and he was telling me how he helped designed the intake and other parts for the 99 cobra and how he was on the svt team and he was showing me pics of him on the track in the 2000 cobra R goin 140 in 4th gear wow. I asked him whats with the tube and he said I could just plug the hole and get a valve cover breather cause that tube gets in my way sometimes when I'm workin on the engine but I was reading in the winsor room that its bad cause its unmetered air, help...thanks

96_4.6 · 08-15-2003, 08:58 PM

Damn it no responces...I'm gonna wait to get some before I put this one in my car.

SleeperGT · 08-15-2003, 10:27 PM

I've had one on my car for quite some time with no issues. The shop I use told me it can actually help prevent issues because if you're pusing oil past the valve cover gaskets you won't be feeding into into the motor since it's no longer returning the air.

sleeper_stang_2000 · 08-20-2003, 07:22 PM

So it's ok to replace with a breather?

96_4.6 · 08-20-2003, 09:54 PM

The breather I bought takes the place of the oil cap, do they make one to fit the the part the plastic tube goes into on the valve cover cause that piece doesnt wanna come out. I'm gonna plug the hole on the cold air induction and the hole where the plastic tube goes into and put the breather on the oil cap, thats right, right??????

mlambrecht82 · 08-21-2003, 05:24 AM

DON'T PLUG UP THE HOLE ON THE VALVE COVER!!! This is what relieves your engine of all the blow-by vapors. You can go buy a universal fit one at AutoZone or Kragen for $8 or so. It has a rubber base and will slide over the plastic piece in the valve cover. The breather filter will not hurt anything, air flows through it only at cruising speed where vaccum is around 10" HG. Under load or at idle the PCV valve is closed. I've had the breather cap on mine for a while now, and no problems. The MAF senses air after the breather inlet. Just don't disconnect it from the passenger side of the engine where it goes into the intake manifold.

96_4.6 · 08-21-2003, 06:38 PM

Well ok but that thing doesnt want to some out, havent tryed too hard but what size breather fits the valve cover, i think there was 8" and 10" and maybe 12", what about that ford racing breather oil cap its pretty sweet I'm gonna put that on and hope it doesnt hurt anything. I'm still gonna plug the hole on the air induction cause its after market and it had the gold hole where the long plastic tube goes from there to the valve cover.

08-13-2003, 01:16 PM	#1
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	Is a valve cover breather bad for the 4.6???? I was going to take out the long plastic tube that goes from the valve cover across the engine and into the cold air induction and plug the hole on the cold air induction and put a valve cover breather in the valve cover. Reason being out of nowhere the guy across the street who has lived there for 5 years and I've never talked to him came across the street when I was installing my spacer and havin a small problem and he was telling me how he helped designed the intake and other parts for the 99 cobra and how he was on the svt team and he was showing me pics of him on the track in the 2000 cobra R goin 140 in 4th gear wow. I asked him whats with the tube and he said I could just plug the hole and get a valve cover breather cause that tube gets in my way sometimes when I'm workin on the engine but I was reading in the winsor room that its bad cause its unmetered air, help...thanks __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-15-2003, 08:58 PM	#2
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	Damn it no responces...I'm gonna wait to get some before I put this one in my car. __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-15-2003, 10:27 PM	#3
SleeperGT Registered Member Join Date: Sep 2002 Location: Ponte Vedra Beach, FL Posts: 122	I've had one on my car for quite some time with no issues. The shop I use told me it can actually help prevent issues because if you're pusing oil past the valve cover gaskets you won't be feeding into into the motor since it's no longer returning the air. __________________ '00 GT 5-spd Vortech S-Trim 3.1" Pulley Paxton Air-to-Air Aftercooler 90 mm MAS 42 lb injectors Cobra Fuel Pump 70 mm AccuFab Throttlebody C & L Intake Plenum 2 1/2" X-pipes Anderson PowerPipe MagnaFlow Mufflers Diablo Custom Chip 3.73's Steeda Lower Control Arms 358 rwhp (Mustang Dyno) New Track Times Coming Soon

08-20-2003, 07:22 PM	#4
sleeper_stang_2000 Registered Member Join Date: Mar 2003 Location: south florida Posts: 45	So it's ok to replace with a breather? __________________ 2000 GT Coupe Automatic! CAI, X-Pipe, Eibach Pro, 100 Shot NOS Best run: 12.187 @112.9 w/ 1.75 60ft. 3ft Above Sea evel

08-20-2003, 09:54 PM	#5
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	The breather I bought takes the place of the oil cap, do they make one to fit the the part the plastic tube goes into on the valve cover cause that piece doesnt wanna come out. I'm gonna plug the hole on the cold air induction and the hole where the plastic tube goes into and put the breather on the oil cap, thats right, right?????? __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-21-2003, 05:24 AM	#6
mlambrecht82 Registered Member Join Date: Oct 2002 Location: Fresno, CA Posts: 101	DON'T PLUG UP THE HOLE ON THE VALVE COVER!!! This is what relieves your engine of all the blow-by vapors. You can go buy a universal fit one at AutoZone or Kragen for $8 or so. It has a rubber base and will slide over the plastic piece in the valve cover. The breather filter will not hurt anything, air flows through it only at cruising speed where vaccum is around 10" HG. Under load or at idle the PCV valve is closed. I've had the breather cap on mine for a while now, and no problems. The MAF senses air after the breather inlet. Just don't disconnect it from the passenger side of the engine where it goes into the intake manifold. __________________ _________________________________ 04 Cobra densecharger CAI BBK off road X pipe Custom Electronic Exhaust cut outs Tuning via Diablo Predator Ported and polished Throttle body and plenum Line locker (for the smoke shows) Stock boost 412 rwhp 379 rwtq

08-21-2003, 06:38 PM	#7
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	Well ok but that thing doesnt want to some out, havent tryed too hard but what size breather fits the valve cover, i think there was 8" and 10" and maybe 12", what about that ford racing breather oil cap its pretty sweet I'm gonna put that on and hope it doesnt hurt anything. I'm still gonna plug the hole on the air induction cause its after market and it had the gold hole where the long plastic tube goes from there to the valve cover. __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

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