PCV Valve

lonestar1 · Oct 10, 2015

Gentlemen, got 205K miles on 2002 4.6 motor. My original pcv valve has the 90 degree bend and I can't find a replacement pcv. The new ones are straight up and I will need a new hose. Does a pcv valve go bad? I always clean them with carb cleaner. I've noticed quite a bit of oil in the line and wondering if this is normal or if the valve may be worn out.

Thanks for your help.

Lonestar1

96blak54 · Oct 10, 2015

You may need a new pcv valve and replacing the grommet is ideal too, but the modulars have alot of residual oil floating around in the valve covers that get sucked into the intake tract. Grabbing an oil/air separator from steeda, summit, jegs eliminates this. All modular engines need an oil/air separator regardless of use.

lonestar1 · Oct 11, 2015

Can there be enough oil to notice it burning in the exhaust?

96blak54 · Oct 11, 2015

Yes, but mostly noticed at high rpm and not idle or low running

yzfr6i · Oct 11, 2015

Another thing to check while your working on your PCV is the line that runs from the passenger side to the throttle body. Start the car and let it idle. Look at the hose where it makes the 90* bend and goes into the TB, and see if the hose is collapsing. The oil that gets sucked through the hose causes it to breakdown and become weak. The addition of an oil separator will replace this as well.

96blak54 · Oct 11, 2015

^ I remember this with my crownvic....good advice!!

Nuttinbutcrumbs · Oct 14, 2015

96blak54 said:
^ I remember this with my crownvic....good advice!!

Do the modular's have that screen that's under the pcv in the intake like the 302's do?
PS: I'm not sure about w the modular's but aftermarket grommets always suck, way too loose.

Don't Sext and Drive.