How do our motors relieve internal pressure?
Thread Starter
Registered User
Joined: Jun 2001
Posts: 234
From: Greater West Palm Beach, FL
How do our motors relieve internal pressure?
Had an "old school" hotrodder wanting my airpump that I removed from my car for his drag car because he said he can use the pump to relieve the internal pressure that builds up in his engine. Then he asked what our engines did to relieve internal crankcase pressure and frankly, I had no answer for him. Does anyone know?
</text></svg>)
Registered User
Joined: May 2004
Posts: 412
From: Toronto, Ontario
Re: How do our motors relieve internal pressure?
Originally Posted by 96capricemgr
Every street car I have ever worked on used a PCV valve, basically it uses manifold vacuum to suck the bad gasses out of the crankcase.
Registered User
Joined: Nov 2001
Posts: 1,152
From: Bahrain
Re: How do our motors relieve internal pressure?
Originally Posted by F(ast)-body
Had an "old school" hotrodder wanting my airpump that I removed from my car for his drag car because he said he can use the pump to relieve the internal pressure that builds up in his engine. Then he asked what our engines did to relieve internal crankcase pressure and frankly, I had no answer for him. Does anyone know?
Registered User
Joined: Dec 1999
Posts: 2,248
From: Houston, TX
Re: How do our motors relieve internal pressure?
Originally Posted by sssalah
I wonder if that small pump is going to get the job done for him. This pump is used for pushing a small amount of air, and what he needs is a vacuum pump.
Ryan
Registered User
Joined: Mar 2001
Posts: 165
From: arvada, colorado, USA
Re: How do our motors relieve internal pressure?
Originally Posted by 96capricemgr
Every street car I have ever worked on used a PCV valve, basically it uses manifold vacuum to suck the bad gasses out of the crankcase.
well, not "bad gasses", just gas in general.
HydroCarbons to be exact
Registered User
Joined: Sep 2002
Posts: 3,456
Registered User
Joined: Aug 2002
Posts: 527
From: Orlando, FL
Re: How do our motors relieve internal pressure?
Originally Posted by F(ast)-body
Had an "old school" hotrodder wanting my airpump that I removed from my car for his drag car because he said he can use the pump to relieve the internal pressure that builds up in his engine. Then he asked what our engines did to relieve internal crankcase pressure and frankly, I had no answer for him. Does anyone know?
Administrator
Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
Re: How do our motors relieve internal pressure?
Some "off" info here.....
And water vapor... a product of combustion/blowby. Let that condense in your oil and see what forms.
But its a common trick to attach the SUCTION side of the AIR pump to the PCV valve location, and let it "vacuum" the gasses out of the crankcase, and dump them into the exhaust. Unfortunately, it is not capable of developing more than about 5"Hg vacuum, but it is vacuum.
well, not "bad gasses", just gas in general.
HydroCarbons to be exact
HydroCarbons to be exact
...the AIR pump is not a vacuum. It is a pump that pumps air into the exhaust to dilute it buring cold starts to keep your cats working.
Thread
Thread Starter
Forum
Replies
Last Post
dbusch22
Forced Induction
6
Oct 31, 2016 11:09 AM
Henson071
Parts For Sale
6
May 4, 2015 12:23 PM
armedtrigger
LT1 Based Engine Tech
10
Feb 24, 2015 08:30 PM