|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
09-29-2010, 04:29 PM | #1 |
Senior Member
Join Date: Jun 2010
Location: Polk City, Iowa
Posts: 526
|
Crankcase vacuum vent
I am thinking of drilling a hole in the intake manifold similar to the vacuum source for the windshield wiper. Then pipe threading a line from there through the valve cover to draw crankcase vapors into intake manifold to be burned. Does this sound like a good idea or is there something I should know better than this? Advise? Yea or Nay?
Steve Hanna .
__________________
Steve Hanna, Polk City, IA |
09-29-2010, 04:59 PM | #2 |
Senior Member
Join Date: May 2010
Location: Creston Canada BC
Posts: 609
|
Re: Crankcase vacuum vent
DON'T do this. the chances are very high to burn motor oil instead of fuel specially with a older engine .
|
Sponsored Links (Register now to hide all advertisements) |
|
09-29-2010, 05:04 PM | #3 |
Senior Member
Join Date: May 2010
Location: Westlake Village, CA
Posts: 477
|
Re: Crankcase vacuum vent
Why do you say no? Is the vacuum to high? I would think a PVC valve might be fitted.
|
09-29-2010, 05:08 PM | #4 |
Senior Member
|
Re: Crankcase vacuum vent
I have this in my records;
__________________
What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II |
09-29-2010, 05:50 PM | #5 |
Senior Member
Join Date: May 2010
Location: Northeast Penna
Posts: 2,108
|
Re: Crankcase vacuum vent
You would want to fit a PCV valve; just drilling a hole and running a pipe from the valve-chamber / crankcase to the intake would result in a serious vacuum "leak", really compromising performance.
A PCV valve actually allows a small "bleed" during periods of high manifold vacuum ( little load), and opens-up during periods of low intake vacuum, such as hard pulls, when blow-by is likely to be greater. You really need the PCV Valve. What is your goal ? Done properly, it would be a general improvement (help scavenge blow-by vapors / moisture from the crankcase, particularly important if your car only sees short local trips, and never gets out for regular runs lasting a 1/2-hour or more. This would be even more true if you are not running a thermostat. SC Frank |
09-29-2010, 10:26 PM | #6 |
Senior Member
Join Date: Jun 2010
Location: Polk City, Iowa
Posts: 526
|
Re: Crankcase vacuum vent
Sponsored Links (Register now to hide all advertisements)
__________________
Steve Hanna, Polk City, IA |
09-29-2010, 10:52 PM | #7 |
Senior Member
Join Date: May 2010
Location: Northeast Penna
Posts: 2,108
|
Re: Crankcase vacuum vent
Steve,
An accessory oil breather tube (available from Brattons, SNyders, and others) that clamps onto the oil fill pipe would probably help as much as anything; in addition to directing blow-by down under the car, the air rushing past the end of the pipe when the car is in motion creates a partial vacuum, thus drawing fumes / air from the crankcase... Some makers referred to it as the "road-draft tube"... I am also a big advocate of using a thermostat, or some other means to get the engine temp up to 160-180* quickly, and keep it there. I just installed a 160* stat ( with two 1/8" bleed holes) in my upper hose, and the car is up to 160* within five-six minutes running, and maintains 160-170*; previously, with the onset of cooler weather (60* ambient air temp). I could drive around town all down and never break 140*... too cold for my comfort. |
09-29-2010, 11:12 PM | #8 |
Senior Member
Join Date: Jun 2010
Location: Polk City, Iowa
Posts: 526
|
Re: Crankcase vacuum vent
Frank,
Yes, I have a 160 thermostat also. Thanks, I will check on the "road draft tube".
__________________
Steve Hanna, Polk City, IA |
09-30-2010, 01:10 AM | #9 |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
|
Re: Crankcase vacuum vent
My well worn noise engine doesn't leak a drop of oil. it came with a road draft tube, so I just left it on there. It does it's job just fine.
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|