feed line from valve cover to tb

Hunt_chevs · October 15th, 2011, 04:08 PM

This can be removed and replaced with a filter/breather? Basically I think the line is bleding oil into the throttle body where it looks to be leaking from the linkage butterfly and its dripping onto valve cover..

DigitalDC89 · October 15th, 2011, 11:19 PM

i dont see why not, its just a breather line for excess crank pressure. sounds like you have some excessive blow by, causing oil to be pushed up that far. wouldnt think it would leak out of the throttle body though...

fogged306 · October 15th, 2011, 11:32 PM

Yep, like he said, it's crankcase pressure doing that which probably means your rings aren't in great condition. If you do pull it and put a breather on it you also need to remove the PCV from the lower intake and plug the vac line coming from the upper intake. You can either plug the hole in the lower or put another breather there. If you leave the PCV hooked up and put a breather on the valve cover you will have unmetered air entering in to the intake.

Stevo077 · October 16th, 2011, 02:50 PM

I also plugged mine, cause my aftermarket valvecovers didnt have a place for the line to go. So i need to plug my pcv? Are there any ill effects of plugging both, or is there a simple fix i can do?

ryanw · October 17th, 2011, 11:47 PM

Originally Posted by fogged306

Yep, like he said, it's crankcase pressure doing that which probably means your rings aren't in great condition. If you do pull it and put a breather on it you also need to remove the PCV from the lower intake and plug the vac line coming from the upper intake. You can either plug the hole in the lower or put another breather there. If you leave the PCV hooked up and put a breather on the valve cover you will have unmetered air entering in to the intake.

Hey fog..... Wouldn't it also be a vacuum leak as well if he put a breather on the valve covers but left the PVC hooked up to the intake ?

fogged306 · October 18th, 2011, 09:02 AM

Yep. Only difference between the term un-metered air and vacuum leak on a MAF car is that vacuum leak has to be after the TB, but un-metered air can be anything after the MAF. In this case, it would be both vac leak and un-metered air.

October 15th, 2011, 04:08 PM	#1
Hunt_chevs Hardcore Enthusiast 2002 Gt Not Slow Join Date: Aug 2007 Location: SJ-CA, 50-ft elev. Posts: 1,649 iTrader: 1 reviews	feed line from valve cover to tb This can be removed and replaced with a filter/breather? Basically I think the line is bleding oil into the throttle body where it looks to be leaking from the linkage butterfly and its dripping onto valve cover.. __________________ 2k2 Gt Eibach pro kit, bbk cold air, exhaust, 4.10s, 6k hid's

October 15th, 2011, 11:19 PM	#2
DigitalDC89 Regular '88 Mustang GT Join Date: Apr 2010 Location: Allentown, PA Posts: 463 iTrader: 0 reviews	i dont see why not, its just a breather line for excess crank pressure. sounds like you have some excessive blow by, causing oil to be pushed up that far. wouldnt think it would leak out of the throttle body though... __________________ '02 Mustang GTm Convertible - N/A Cammed Daily '88 Mustang GTm - 1/4 Mile Build - 750rwhp Project '97 Saturn SL2m - Ex-Nitrous Build - Back-Up Daily

October 16th, 2011, 02:50 PM	#4
Stevo077 Regular 1990 Mustang GT Join Date: Jun 2011 Location: NE Oklahoma Posts: 123 iTrader: 0 reviews	I also plugged mine, cause my aftermarket valvecovers didnt have a place for the line to go. So i need to plug my pcv? Are there any ill effects of plugging both, or is there a simple fix i can do? __________________ 1990 Mustang GT

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October 15th, 2011, 11:32 PM	#3
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Yep, like he said, it's crankcase pressure doing that which probably means your rings aren't in great condition. If you do pull it and put a breather on it you also need to remove the PCV from the lower intake and plug the vac line coming from the upper intake. You can either plug the hole in the lower or put another breather there. If you leave the PCV hooked up and put a breather on the valve cover you will have unmetered air entering in to the intake.

October 18th, 2011, 09:02 AM	#6
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Yep. Only difference between the term un-metered air and vacuum leak on a MAF car is that vacuum leak has to be after the TB, but un-metered air can be anything after the MAF. In this case, it would be both vac leak and un-metered air.

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