Full Size K5 (1969-1991) GMT415 (1992-1994) Tech Discuss any and all full size K5 general tech topics here.

Strange pipe on exhaust manifold

  #1  
Old 01-09-2011, 03:59 PM
Beginning Member
Thread Starter
Join Date: Dec 2010
Posts: 16
bill9000 is on a distinguished road
Default Strange pipe on exhaust manifold

Hey all - I've recently acquired some full length headers and such, getting ready to ditch the restrictive stock y pipe, and get some duals going on my 87 K5 here, and I was just getting ready to take the manifolds off and see these pipes coming out of each manifold, does anyone know offhand what they are for, and will it affect it's running without them?????

thanks! have a great day!
 
  #2  
Old 01-09-2011, 07:06 PM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,795
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

Looks like an AIR pump line. Where does it run to?
 
  #3  
Old 01-09-2011, 10:50 PM
Beginning Member
Thread Starter
Join Date: Dec 2010
Posts: 16
bill9000 is on a distinguished road
Default

Originally Posted by swartlkk View Post
Looks like an AIR pump line. Where does it run to?
the driver's side one appears so go around behind the block above the transmission... can't see exactly where it goes easily.

so, if it is AIR pump lines, when I remove them, and put the headers on, will there be some adverse affect - such as cold idle not working right or anything????

 
  #4  
Old 01-10-2011, 09:08 AM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,795
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

Other than the possibility of failing a visual inspection depending on how **** the inspector is and your local laws, it really won't hurt things to remove the whole AIR pump system. It is a system that pushes fresh air into the exhaust to improve catalytic converter efficiency. If you have replaced your catalytic converter(s) with newer style converters, this system really doesn't help all that much.
 
  #5  
Old 01-14-2011, 02:27 PM
Beginning Member
Thread Starter
Join Date: Dec 2010
Posts: 16
bill9000 is on a distinguished road
Default

Originally Posted by swartlkk View Post
Other than the possibility of failing a visual inspection depending on how **** the inspector is and your local laws, it really won't hurt things to remove the whole AIR pump system. It is a system that pushes fresh air into the exhaust to improve catalytic converter efficiency. If you have replaced your catalytic converter(s) with newer style converters, this system really doesn't help all that much.
ok cool, I was just worried about taking this stuff off and having it not run or something.... also, there's a sensor of some sort in the driver's side exhaust manifold.... I'm assuming I might need to do something to bypass that as well...
 
  #6  
Old 01-18-2011, 09:11 PM
Mighty Mouse's Avatar
New Member
Join Date: Dec 2010
Location: Carlisle, Pa
Posts: 51
Mighty Mouse is on a distinguished road
Default

That sensor in the manifold is a O2 sensor and you can't delete it if you have a tbi engine.
 
  #7  
Old 01-24-2011, 06:53 PM
New Member
Join Date: Jan 2011
Posts: 2
TheTransporter is on a distinguished road
Default

ahh not true. u CAN delete it but ur truck will run in closed loop FOREVER. ie my situation fml
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
98blazermatt
General Chat
1
05-05-2014 09:20 PM
justblazin1
1st Gen S-series (1983-1994) Tech
0
04-03-2013 07:31 PM
Sherwood
2nd Gen S-series (1995-2005) Tech
5
12-31-2008 02:36 PM
ScottECU
Headers, Intake, & Exhaust
2
06-06-2007 01:58 PM
vtboss54
Headers, Intake, & Exhaust
2
03-27-2007 02:13 AM


Thread Tools
Search this Thread
Quick Reply: Strange pipe on exhaust manifold


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.