Valve cover breather leaks..... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Touchdown67 · 01-08-2012, 06:34 PM

I have a SBC 400 with MT valve covers. The problem I am having is the breather is leaking. I put a PCV valve on the left cover and plumbed it into the carb. What can I do to stop the other one from leaking oil out?

Rich 5150 69 · 01-08-2012, 08:22 PM

When you say left side I don`t see it I`m assuming you mean the right side, is the breather cap on the right solid with no holes...anwhere in it besides the PVC valve / line...?

**Captainfab** · 01-09-2012, 01:30 AM

Is the baffle plate in place on the inside?

glos55 · 01-09-2012, 02:57 PM

I think he means left side of engine as if you were sitting inside. From the pic you can see where the oil is leaking and burning off on the exhaust manifold. I agree with Captainfab and check for baffle in valve cover.

**argonaut** · 01-09-2012, 03:13 PM

Yeah, a good PCV valve and good baffling on the inside of the valve cover, below the breather port, should prevent this sort of thing.

Touchdown67 · 01-09-2012, 11:52 PM

Quote:

Originally Posted by Captainfab

Is the baffle plate in place on the inside?

I do not believe there was a baffle plate in either cover. That would probably make all the difference. Thanks.
By the way your P/S bracket worked perfectly.

01-08-2012, 06:34 PM	#1
Touchdown67 Registered User Join Date: Jul 2010 Location: Scottsdale, Arizona Posts: 204	Valve cover breather leaks..... I have a SBC 400 with MT valve covers. The problem I am having is the breather is leaking. I put a PCV valve on the left cover and plumbed it into the carb. What can I do to stop the other one from leaking oil out? Attached Images

01-08-2012, 08:22 PM	#2
Rich 5150 69 Registered User Join Date: Nov 2009 Location: Galt, Calif Posts: 2,437	Re: Valve cover breather leaks..... When you say left side I don`t see it I`m assuming you mean the right side, is the breather cap on the right solid with no holes...anwhere in it besides the PVC valve / line...? __________________ `64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip

01-09-2012, 01:30 AM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Valve cover breather leaks..... Is the baffle plate in place on the inside? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

01-09-2012, 02:57 PM	#4
glos55 Registered User Join Date: Nov 2010 Location: Kalamazoo, MI Posts: 1,008	Re: Valve cover breather leaks..... I think he means left side of engine as if you were sitting inside. From the pic you can see where the oil is leaking and burning off on the exhaust manifold. I agree with Captainfab and check for baffle in valve cover.

01-09-2012, 03:13 PM	#5
argonaut Senior Member Join Date: Aug 2008 Location: Long Beach, CA Posts: 1,813	Re: Valve cover breather leaks..... Yeah, a good PCV valve and good baffling on the inside of the valve cover, below the breather port, should prevent this sort of thing. __________________ Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! Last edited by argonaut; 01-09-2012 at 03:15 PM. Reason: Punctuation



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