Valve Cover Breather Solution Needed
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Instructor
Joined: Sep 2005
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From: Chesapeake VA
Valve Cover Breather Solution Needed
I need to come up with a different solution for my valve cover breather. I'm running the GMPP "Chevrolet" valve covers, which have a plain 1.22" dia hole on the pax. side cover. I'm currently using a K&N breather filter that I've modified the base of mounted directly in the hole. It's just a standard K&N part that has no baffles etc. and the problem seems to be that since the breather is mounted at an angle, oil mist trapped by the filter element is dripping out of the low side of the breather. Here's a pic of the arrangement, you can see where the oil has been.
What I'm looking for is either an attractive looking push-in style cap with built baffles and breather, or an elegant solution to go from a plain 1.22" hole to AN-6 hose and then to a remote breather can. I have 1.00" and .75" grommets for the valve cover hole.
I was thinking maybe a 1/2" NPT to AN-6 elbow, screwed into the .75" grommet. The O.D. of 1/2" NPT is .840", so it'd be a tight fit for sure. Anyone have a line on a better solution? Maybe a 1.00" or .75" hose barb to AN-6 adapter elbow? Any other suggestions are appreciated!
What I'm looking for is either an attractive looking push-in style cap with built baffles and breather, or an elegant solution to go from a plain 1.22" hole to AN-6 hose and then to a remote breather can. I have 1.00" and .75" grommets for the valve cover hole.
I was thinking maybe a 1/2" NPT to AN-6 elbow, screwed into the .75" grommet. The O.D. of 1/2" NPT is .840", so it'd be a tight fit for sure. Anyone have a line on a better solution? Maybe a 1.00" or .75" hose barb to AN-6 adapter elbow? Any other suggestions are appreciated!
Tech Contributor
Joined: Jan 2007
Posts: 19,401
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From: Dyer, IN
I need to come up with a different solution for my valve cover breather. I'm running the GMPP "Chevrolet" valve covers, which have a plain 1.22" dia hole on the pax. side cover. I'm currently using a K&N breather filter that I've modified the base of mounted directly in the hole. It's just a standard K&N part that has no baffles etc. and the problem seems to be that since the breather is mounted at an angle, oil mist trapped by the filter element is dripping out of the low side of the breather. Here's a pic of the arrangement, you can see where the oil has been.
What I'm looking for is either an attractive looking push-in style cap with built baffles and breather, or an elegant solution to go from a plain 1.22" hole to AN-6 hose and then to a remote breather can. I have 1.00" and .75" grommets for the valve cover hole.
I was thinking maybe a 1/2" NPT to AN-6 elbow, screwed into the .75" grommet. The O.D. of 1/2" NPT is .840", so it'd be a tight fit for sure. Anyone have a line on a better solution? Maybe a 1.00" or .75" hose barb to AN-6 adapter elbow? Any other suggestions are appreciated!
What I'm looking for is either an attractive looking push-in style cap with built baffles and breather, or an elegant solution to go from a plain 1.22" hole to AN-6 hose and then to a remote breather can. I have 1.00" and .75" grommets for the valve cover hole.
I was thinking maybe a 1/2" NPT to AN-6 elbow, screwed into the .75" grommet. The O.D. of 1/2" NPT is .840", so it'd be a tight fit for sure. Anyone have a line on a better solution? Maybe a 1.00" or .75" hose barb to AN-6 adapter elbow? Any other suggestions are appreciated!
Race Director
Joined: Jan 2006
Posts: 10,554
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From: Not on either liberal coast.
Have a machine shop make a billet aluminum cap for the GMPP valve covers. They might even be available in the after market. If any place would, it's STREET & PERFORMANCE...
http://www.hotrodlane.cc/
It shouldn't be that expensive to make one up whether it's push in or threaded. Have them machine the cap to accept an AN fitting in whatever size you want.
http://www.hotrodlane.cc/
It shouldn't be that expensive to make one up whether it's push in or threaded. Have them machine the cap to accept an AN fitting in whatever size you want.
Last edited by hotwheels57; May 3, 2010 at 12:01 PM.
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Joined: May 2008
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From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Also not a very "elegant" solution, but a 70's GM type (AC Delco FB-59 or equivalent) PCV breather filter will push right into the valve cover grommet.
Position it with the open side of the filter element facing toward the upward side,
and any oil residue will then drain back into the valve cover.
Position it with the open side of the filter element facing toward the upward side,
and any oil residue will then drain back into the valve cover.
Last edited by Quicksilver Vert 01; May 3, 2010 at 06:15 PM. Reason: added P/N
Thread Starter
Instructor
Joined: Sep 2005
Posts: 199
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From: Chesapeake VA
Good info guys, thanks! I think I'll pick up one of the FB-59 type filters tonight and use it in the short term, while looking a little deeper at the solution lucky131969 uses. If I do go a custom fab route I'll probably have one of the male AN-6 weld fittings I've got laying around welded directly to the top of the VC, althoug a custom cap with welded or screwed in fitting like hotwheels57 suggests could look cool as well.
