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#1 |
Registered User
Join Date: Jun 2010
Location: Oakland, CA
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Hey guys I just bought some valve covers for my truck with stock type baffles, question: do I need blowers, if so what type do you guys recommend?
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#2 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
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Re: Valve Covers
What are blowers?
Gary
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#3 |
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Re: Valve Covers
I think he means breathers?
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#4 |
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Join Date: Jun 2010
Location: Oakland, CA
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Re: Valve Covers
Sorry I did mean breathers, my bad.
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#5 |
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Re: Valve Covers
1 side needs a breather, 1 side needs a PCV valve.
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#6 |
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Join Date: Jun 2010
Location: Oakland, CA
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Re: Valve Covers
Got it, I'll add those to the order. I'm going to say the pcv valve hooks up to the air cleaner?
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#7 |
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Join Date: Jan 2003
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Re: Valve Covers
i'd suggest some reading// either you can buy a factory service manual loaded with info or if that $25 investment is too steep for you try a local library for a generic manual read up on different stuff like how a crankcase ventalation system works, how a brake system functions, air fuel timing trilogy ,to get at least some of the most basic concepts down
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#8 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
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Re: Valve Covers
The PCV valve does NOT hook up to the air cleaner. The true closed system for a PCV system is to have the top of the PCV valve run to the carburetor base (going directly into the intake manifold) and the other valve cover's cap going to the air cleaner to make sure that your fumes and oil does not get out onto the engine. However, if you get just a standard breather cap for the opposite side, then it will pull air from the atmosphere.
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#9 | |
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Re: Valve Covers
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 07-01-2010 at 06:36 PM. |
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#10 | |
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Re: Valve Covers
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If you have never witnessed a crankcase fire or a engine running off of it's own crankcase fumes, then it is hard to fathom, what I am referring to. I make a special effort to purge my engines and they virtually stay clean for miles.
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#11 | |
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Re: Valve Covers
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 07-02-2010 at 09:45 AM. |
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#12 | |
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Re: Valve Covers
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#13 | |
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Re: Valve Covers
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#14 | |
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Re: Valve Covers
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 07-02-2010 at 12:39 PM. |
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#15 | |
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Re: Valve Covers
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Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com Last edited by HuggerCST; 07-02-2010 at 02:20 PM. |
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#16 |
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Re: Valve Covers
Im running a pcv to the carb and a oil cap on the other side myself, never any problems, if you try just running a breather though youll get blow by out the breather, (from my experience)
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1967custom |
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#17 |
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Join Date: Jun 2010
Location: Oakland, CA
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Re: Valve Covers
My truck has the original engine in it. Right now I have one valve cover with a breather and the other just spewing oil fumes which definitely can not be good for the engine. I bought the truck this way so I don't know if the pcv was hooked up to the air cleaner or carb but I've read it hooks up to the air cleaner, back to the drawing board for more reasearch and definitely a manual. Tons of info guys thanks for all the input, advice and info.
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#18 |
Gone to greener pastures
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Re: Valve Covers
The air cleaner line is actually the breather. It comes off the air cleaner so that clean air is getting sucked into the engine.
A breather on the valve cover serves the same purpose, clean air into the crankcase. The PCV valve is connected to the carburetor and the valve is closed during high manifold vacuum conditions.
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck Last edited by El Jay; 07-02-2010 at 01:32 AM. |
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#19 |
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Join Date: Jun 2010
Location: Upland Ca
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Re: Valve Covers
Put a cheapo breather in each cover for now and research the correct PVC system for your application. The idea is to ventilate the case of blow by. Pair of breathers vent to atmosphere, PVC system vents back into the combustion chamber. Let's not make this any harder than it needs to be.
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#20 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
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Re: Valve Covers
I would definitely run a PCV valve. I had a 350 on which I ran just breathers. Turned the oil into a thick sludge.
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#21 |
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Re: Valve Covers
yeah 2 breathers is not a good Idea, you have to run a pcv to keep your oil from contamination and sludge build up,( not to mention keeping the engine somewhat clean) hook it up to the bottom inlet of the edelbrock, Ive seen set ups where they hook it up to the air inlet at the back of the carb coming out the intake also but I dont think thats a very good idea, also If you think about it, clean out the pcv once in a while.
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1967custom Last edited by michael bustamante; 07-02-2010 at 11:44 AM. |
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#22 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
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Re: Valve Covers
I needed a PCV on mine, and didn't wanna run it to the air cleaner. I needed full vacuum to my power brake booster, and I used the fitting in the back of my Holley 3310 for that. So I drilled and tapped a 1/4" NPT hole into my 1" aluminum carb spacer and ran a PCV hose from a fitting I screwed into the back of the 1" spacer over to a PCV on the valve cover on the passenger side.
I run a regular breather on the drivers side that pops out to fill engine with oil as well. 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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#23 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
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Re: Valve Covers
Shucks, fella---you all didn't have to fall onto the sword YET. We could have had some fun with this.
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#24 |
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Re: Valve Covers
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Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com |
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#25 |
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Join Date: Feb 2008
Location: Carson, CA
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Re: Valve Covers
I've got to say that I have no clue which way is OK now. I think what I'm hearing is that you MUST have a PCV running to the carb, but a breather in addition to that is optional?
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