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#1 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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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.
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#2 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,936
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Re: Valve cover Hole questions
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
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#3 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Valve cover Hole questions
running a good PCV system is great for the longterm health of your engine
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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 |
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#4 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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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.
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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. |
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#5 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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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.
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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 |
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#6 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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Re: Valve cover Hole questions
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.
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#7 | |
Registered User
Join Date: Oct 2003
Location: OC CA
Posts: 1,374
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Re: Valve cover Hole questions
Quote:
1.22" is 1-7/32" or very close to 31mm Lenox 30912 step drill bit has 1-7/32 (not cheap) ![]() Greenlee 36489 Punch 1-7/32 (not cheap) ![]() 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
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"The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) ![]() New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17) |
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#8 |
Registered User
Join Date: Dec 2008
Location: Ashland, KY
Posts: 700
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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!
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68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD |
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#9 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,600
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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!!!
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#10 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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Re: Valve cover Hole questions
Yep they have baffels
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#11 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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Re: Valve cover Hole questions
Since were on the subject what are your thoughts on Neoprene valve cover gaskets?
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#12 |
Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: Valve cover Hole questions
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.
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'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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#13 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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Re: Valve cover Hole questions
Actually I havent heard of them. Ive just seen people mention neoprene gaskets in other forums and around. Ill check them out though.
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#14 |
70Custom10
Join Date: Jan 2010
Location: Rapid City, SD
Posts: 322
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Re: Valve cover Hole questions
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Tags |
holes, valve covers, venting |
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