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indy cylinder head valve cover breathers #2666832
06/17/19 11:19 AM
06/17/19 11:19 AM
Joined: Aug 2011
Posts: 278
indy
7
70moparmike Offline OP
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70moparmike  Offline OP
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indy
these came not pre drilled and was wondering if anybody has installed the breathers on these valve covers? the baffles look like they would suck oil, and they told me to drill holes on the covers to mount the baffle plates? all the way through the valve covers, wouldn't they leak and look horrible. any pics of your motors with the breathers installed and maybe pcv on them. thanks moparts

Last edited by 70moparmike; 06/17/19 11:20 AM.
Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2666843
06/17/19 11:26 AM
06/17/19 11:26 AM
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Posts: 15,933
S.E. Michigan
ZIPPY Offline
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ZIPPY  Offline
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S.E. Michigan
I installed '70s Mopar type breathers, OEM Mopar breather grommets, and sheet metal baffles.
Baffles are held in place by 2 sst allen screws, double nuts, and locktite.
You could also weld the baffles in if you wanted.

They aren't the most installer-friendly parts I've ever seen... but once you get them all set up they seem 100% worth the effort.

451a.jpg

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Re: indy cylinder head valve cover breathers [Re: ZIPPY] #2666862
06/17/19 12:10 PM
06/17/19 12:10 PM
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Posts: 278
indy
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70moparmike Offline OP
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indy
did you have to drill holes all the way through the valve covers for the baffles?

Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2666864
06/17/19 12:20 PM
06/17/19 12:20 PM
Joined: May 2005
Posts: 816
Apollo, PA.
B1MAXX Offline
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B1MAXX  Offline
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Apollo, PA.
I just use the blind gromit with a slice

GROM.jpg
Re: indy cylinder head valve cover breathers [Re: B1MAXX] #2666885
06/17/19 01:02 PM
06/17/19 01:02 PM
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Posts: 278
indy
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70moparmike Offline OP
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indy
this is going to be a street/strip motor. will a pcv work with the slit one very well? thanks moparts

Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2666910
06/17/19 01:52 PM
06/17/19 01:52 PM
Joined: Jan 2003
Posts: 15,933
S.E. Michigan
ZIPPY Offline
I Live Here
ZIPPY  Offline
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Posts: 15,933
S.E. Michigan
Originally Posted by 70moparmike
did you have to drill holes all the way through the valve covers for the baffles?


Yes. I decided that the bolts wouldn't have enough thread engagement otherwise.

Not everyone would agree


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Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2666987
06/17/19 07:32 PM
06/17/19 07:32 PM
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Posts: 32,949
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Originally Posted by 70moparmike
did you have to drill holes all the way through the valve covers for the baffles?

I've drilled and tap the bosses for #6x32 screws (CRS the length, 1/4 to 1/2 inch confused) and used small flat washers under a piece of flat thin aluminum sheet with red Locktite without going through to the top up scope
I'm going to have a weld in baffle to stop my vacuum pump from sucking so much oil into the surge tank today on a set of cast aluminum valve covers that may be a set of no name Indy covers,I'm not sure where they came from though confused I used a Moroso vacuum pump fitting that has 3 sets of three 1/8 holes on the flats of the fitting facing the outside edge of the valve cover for the suction side, I'm really surprised on how much oil it being suck into the fitting into the GZ vacuum pump, probably around two to four ounces a 1/4 mile run shock
Hopefully the baffle will stop that oil from being sucked out of the motor luck

Last edited by Cab_Burge; 06/18/19 11:03 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: indy cylinder head valve cover breathers [Re: Cab_Burge] #2667030
06/17/19 09:57 PM
06/17/19 09:57 PM
Joined: Aug 2009
Posts: 1,754
Mooresburg, Tn
'
'72CudaRacer Offline
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Mooresburg, Tn
I fixed a set of valve covers/breathers/baffles for a friends engine with cast alum covers that turned out as well as could be expected. I used stainless steel, counter sunk phillips head, 10-32 machine screws, with lock nuts, drilled completely through valve cover. I put just a dab of sealer in the hole before installing screws. Looked good and didn't leak. I also used a small spacer between the baffle and the valve cover to be able to use a push in cap and rubber grommet. CAUTION: make sure you have enough clearance between baffle and rocker arms, BEFORE you drill and cut!!

Brian

Re: indy cylinder head valve cover breathers [Re: '72CudaRacer] #2667037
06/17/19 10:13 PM
06/17/19 10:13 PM
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Ontario, Canada
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Stanton Offline
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Stanton  Offline
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Ontario, Canada
Indy doesn't give a damn about appearances ... that should be obvious just looking at their crappy castings !!

You could use these, the baffle is in the base and a standard breather just slips in.

https://www.summitracing.com/int/parts/sum-440332

Last edited by Stanton; 06/17/19 10:22 PM.
Re: indy cylinder head valve cover breathers [Re: Stanton] #2667131
06/18/19 10:18 AM
06/18/19 10:18 AM
Joined: Feb 2003
Posts: 2,418
S.E. Michigan
cl440 Offline
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S.E. Michigan
Originally Posted by Stanton
Indy doesn't give a damn about appearances ... that should be obvious just looking at their crappy castings !!

You could use these, the baffle is in the base and a standard breather just slips in.

https://www.summitracing.com/int/parts/sum-440332



Bingo! This is what we use. Works well

Re: indy cylinder head valve cover breathers [Re: cl440] #2667137
06/18/19 10:27 AM
06/18/19 10:27 AM
Joined: Jan 2003
Posts: 8,399
MN
J
JERICOGTX Offline
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MN
Moroso screw in breathers.

Motovator383-1.jpg

69 GTX 68 Road Runner
Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2667175
06/18/19 12:25 PM
06/18/19 12:25 PM
Joined: May 2005
Posts: 816
Apollo, PA.
B1MAXX Offline
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Apollo, PA.
Originally Posted by 70moparmike
this is going to be a street/strip motor. will a pcv work with the slit one very well? thanks moparts


yep

put the slit like this....the pcv goes in the open one its a different size.

GROM.jpg
Last edited by B1MAXX; 06/18/19 12:31 PM.
Re: indy cylinder head valve cover breathers [Re: B1MAXX] #2667526
06/19/19 11:41 AM
06/19/19 11:41 AM
Joined: Aug 2011
Posts: 278
indy
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70moparmike Offline OP
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indy
that won't suck oil? i have no baffle in either cover? thanks moparts

Re: indy cylinder head valve cover breathers [Re: 70moparmike] #2667554
06/19/19 12:29 PM
06/19/19 12:29 PM
Joined: May 2005
Posts: 816
Apollo, PA.
B1MAXX Offline
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B1MAXX  Offline
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Apollo, PA.
not if you don't put it over a rocker, keep it over the second stand hold down. front or back , I'm making the assumption also that you have a standard oiling set-up, not through pushrod.


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