Valve cover Hole questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blazerboy_4life · 02-05-2011, 01:45 PM

So im looking at a new set of aluminum valve covers on ebay cause I like that raw aluminum look but Im on a budget. The ones I have now are orange painted Chromes and leak like nobodys business. The ones I like have no holes in them but they offer a pair for the same price that have one hole each. what are the pros and cons of running valve covers with or without the holes in them. Are the ones without just designed to be drilled where i need them? As always thanks for the advise everyone.

GASoline71 · 02-05-2011, 03:50 PM

With no holes... how do you add oil? (unless you have an early 327 or a 283 with oil fill in the manifold) Or run a PCV?

Gary

cdowns · 02-05-2011, 05:41 PM

running a good PCV system is great for the longterm health of your engine

cableguy0 · 02-05-2011, 06:38 PM

They are probably spewing oil because you dont have a proper pcv/breather system and crankcase pressure is through the roof. You need the holes. Breather in one side Pcv in the other.

oldblue1968chevy · 02-05-2011, 07:53 PM

Buy the ones with holes already.

You can drill holes with a holesaw (I did) and the hole was bigger than advertised (1 1/4" but the 1 1/4" breather still leaked around the edges)

You need pcv/breather.

blazerboy_4life · 02-06-2011, 12:53 AM

Quote:

Originally Posted by cableguy0

They are probably spewing oil because you dont have a proper pcv/breather system and crankcase pressure is through the roof. You need the holes. Breather in one side Pcv in the other.

I currently have a set of crappy chrome covers that have 3 holes total. Breather, Pcv, and filler. The ones that I WANT to get have no holes but I just want to make sure im not shooting myself in the foot by getting them. I just hate all the clutter but Im not going to sacrifice the health of my new motor for aesthetics. By the sounds of things Ill be ordering the Holed covers tonight.

rfmaster · 02-06-2011, 01:51 AM

Quote:

Originally Posted by blazerboy_4life

I currently have a set of crappy chrome covers that have 3 holes total. Breather, Pcv, and filler. The ones that I WANT to get have no holes but I just want to make sure im not shooting myself in the foot by getting them. I just hate all the clutter but Im not going to sacrifice the health of my new motor for aesthetics. By the sounds of things Ill be ordering the Holed covers tonight.

The Push on breather and PVC are designed for 1.22" diameter valve cover opening - 1-1/4" (1.250) is too big and will leak - found-out the hard way (ruined valve cover)

1.22" is 1-7/32" or very close to 31mm

Lenox 30912 step drill bit has 1-7/32 (not cheap)

Amazon.com: Lenox 30912-VB12 Vari-Bit 7/8-Inch,...
Greenlee 36489 Punch 1-7/32 (not cheap)

Amazon.com: Greenlee 36489 Slug-Splitter...
From talking to others - use 1-1/8 to get base opening and then bring it to finish size with deburring tool.
http://www.deburringtools.com/deburr...thhandles.html

//RF

BIGBLU 72 · 02-06-2011, 10:34 AM

yeah i have a set like that! i just punched a hole in it with a dremel and matched them to the ones that i currently had! works great!

geezer#99 · 02-06-2011, 10:40 AM

Baffles??? Do the ones with holes have baffles inside below the holes. If not you'll need some. Otherwise your pvc will suck up a lot of oil and you'll be burning oil like crazy!!!

blazerboy_4life · 02-06-2011, 11:00 AM

Quote:

Originally Posted by geezer#99

Baffles??? Do the ones with holes have baffles inside below the holes. If not you'll need some. Otherwise your pvc will suck up a lot of oil and you'll be burning oil like crazy!!!

Yep they have baffels

blazerboy_4life · 02-06-2011, 11:30 AM

Since were on the subject what are your thoughts on Neoprene valve cover gaskets?

ERASER5 · 02-06-2011, 06:07 PM

Quote:

Originally Posted by blazerboy_4life

Since were on the subject what are your thoughts on Neoprene valve cover gaskets?

It looks like you are looking at White Performance. If so, get there Neoprene and stud set. It works great and you can a good torque feel with the long stud nuts.

blazerboy_4life · 02-06-2011, 10:45 PM

Quote:

Originally Posted by ERASER5

It looks like you are looking at White Performance. If so, get there Neoprene and stud set. It works great and you can a good torque feel with the long stud nuts.

Actually I havent heard of them. Ive just seen people mention neoprene gaskets in other forums and around. Ill check them out though.

blazerboy_4life · 02-06-2011, 10:55 PM

Quote:

Originally Posted by GASoline71

With no holes... how do you add oil? (unless you have an early 327 or a 283 with oil fill in the manifold) Or run a PCV?

Gary

To add oil I would just pull the valve cover. Thats what they do with race motors isnt it?

02-05-2011, 01:45 PM	#1
blazerboy_4life 70Custom10 Join Date: Jan 2010 Location: Rapid City, SD Posts: 322	Valve cover Hole questions So im looking at a new set of aluminum valve covers on ebay cause I like that raw aluminum look but Im on a budget. The ones I have now are orange painted Chromes and leak like nobodys business. The ones I like have no holes in them but they offer a pair for the same price that have one hole each. what are the pros and cons of running valve covers with or without the holes in them. Are the ones without just designed to be drilled where i need them? As always thanks for the advise everyone. Attached Images

02-05-2011, 05:41 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Valve cover Hole questions running a good PCV system is great for the longterm health of your engine __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-05-2011, 06:38 PM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Valve cover Hole questions They are probably spewing oil because you dont have a proper pcv/breather system and crankcase pressure is through the roof. You need the holes. Breather in one side Pcv in the other. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-05-2011, 07:53 PM	#5
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: Valve cover Hole questions Buy the ones with holes already. You can drill holes with a holesaw (I did) and the hole was bigger than advertised (1 1/4" but the 1 1/4" breather still leaked around the edges) You need pcv/breather. __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

02-06-2011, 10:34 AM	#8
BIGBLU 72 Registered User Join Date: Dec 2008 Location: Ashland, KY Posts: 700	Re: Valve cover Hole questions yeah i have a set like that! i just punched a hole in it with a dremel and matched them to the ones that i currently had! works great! __________________ 68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD

02-06-2011, 10:40 AM	#9
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,733	Re: Valve cover Hole questions Baffles??? Do the ones with holes have baffles inside below the holes. If not you'll need some. Otherwise your pvc will suck up a lot of oil and you'll be burning oil like crazy!!!

02-06-2011, 11:30 AM	#11
blazerboy_4life 70Custom10 Join Date: Jan 2010 Location: Rapid City, SD Posts: 322	Re: Valve cover Hole questions Since were on the subject what are your thoughts on Neoprene valve cover gaskets?



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