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09-11-2010, 07:34 PM
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#1 |
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Registered User
Join Date: Jan 2010
Location: Anderson, SC
Posts: 11
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What Connects Here
Can anyone tell me what connects to this outlet behind the distributor right beside the oil pressure line?
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09-11-2010, 07:39 PM
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#2 |
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Gone to greener pastures
 Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: What Connects Here
That thing have a PCV system?
I ask because that's where the old road draft tubes were (for venting the crankcase) before PCV systems came about.
__________________
'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 |
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09-11-2010, 07:48 PM
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#3 |
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Registered User
Join Date: Jan 2010
Location: Anderson, SC
Posts: 11
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Re: What Connects Here
Rgr, it's a 283 in a 69 C-10. Have a pcv valve on the driver side valve cover, probably a add-on by the po. Would it hurt anything if I block it off?
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09-11-2010, 07:59 PM
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#4 |
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Gone to greener pastures
Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: What Connects Here
Hmmm. Now ya got me curious. I wonder if your engine is a transplant from an even older vehicle? PCV systems became standard equipment around '63, IIRC.
Any chance you can get the number off the block? It can be a bear to see since it's located on the top rear of the block, just forward of the bell housing. If you have a PCV valve coming off one valve cover & a source of filtered air on the other, I don't think blocking that off would be a problem Hopefully somebody else will jump in here.
__________________
'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 |
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09-11-2010, 08:12 PM
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#5 |
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Registered User
Join Date: Jan 2010
Location: Anderson, SC
Posts: 11
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Re: What Connects Here
Thanks El Jay. Will attempt to get the engine number. Appreciate the assistance.
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09-11-2010, 08:17 PM
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#6 |
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Gone to greener pastures
Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: What Connects Here
BTW:
 You'll find this whole board is folks helping folks. There are several thousands of years of knowledge & experience here.
__________________
'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 |
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09-11-2010, 08:42 PM
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#7 |
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Registered User
Join Date: Aug 2010
Location: Bristow OK
Posts: 16
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Re: What Connects Here
That is a block vent. My old 327 had one. It just had a length of hose connected to it that kind of layed down along the bellhousing and ended just below the tranny. Thats what I would do with it.
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09-11-2010, 08:47 PM
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#8 |
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Registered User
Join Date: Jan 2010
Location: Anderson, SC
Posts: 11
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Re: What Connects Here
Thanks gottrucks. I will do that vice blocking it off. Thanks to all of this site, I'm learning valuable tips, and your advice is much appreciated!!!
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09-11-2010, 10:04 PM
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#9 |
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Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: What Connects Here
I have a 283 in my 71 and I put a freeze plug into it to seal it off. I use the PCV in the valve cover and it works fine.
Smitty
__________________
71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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09-11-2010, 10:32 PM
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#10 |
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Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,411
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Re: What Connects Here
That is the piece that they replaced the road draft tube with when they first started using pcv valves instead of draft tubes. If you have a Pcv in one cover and breather in the other you don't need it and can put a freeze plug in the hole. Don't throw it and the bolt away though as guys still hunt for those when they want to run the early blocks and valve covers without holes in them. Not worth a lot but you might help someone out along the way with it.
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09-11-2010, 10:44 PM
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#11 |
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Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: What Connects Here
As noted it is the crankcase vent found on pre 68 blocks that also had an oil fill tube in the front of the intake manifold. The valve covers were solid and had no holes for a pcv valve. A hose can be routed from the vent to the base of the carb or the intake manifold vacuum port behind the carb. If you have this set up with the oil fill tube, you should have a vented cap on the tube
"  "
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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09-11-2010, 11:55 PM
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#12 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
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Re: What Connects Here
For those that are curious the road draft tube was a metal tube that ran down below the engine. The air moving under the vehicle created a pressure differential in the tube typically lower than the air moving past the tube end. Worked like a syphon drawing the vapors out of the motor. Air inlet on breather on intake. Didn't work to well while sitting still though. Modern pcv system cured that.
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