NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > OEM Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs.

Reply
 
Thread Tools Display Modes
  #1  
Old August 1st, 2020, 17:05
xjerod's Avatar
xjerod xjerod is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: maryland
Posts: 11
Headers or Manifold for 91XJ Daily Driver

I noticed I have small cracks in my exhaust manifold and as I look for something new I am thinking about headers vs the exhaust manifold... what are your thoughts? I am undecided about which to go with.. will it make a difference for my 91 Daily Driver?

Would it help ease oil blowback?

91 Cherokee
4.0L
105k Miles
Reply With Quote
  #2  
Old August 1st, 2020, 19:37
tempest411 tempest411 is offline
NAXJA Forum User
 
Join Date: Apr 2007
Location: Discovery Bay, CA
Posts: 39
Re: Headers or Manifold for 91XJ Daily Driver

The original exhaust manifold on these WERE headers. When I got my '88 back in '99 it had some cracks and leaked. I replaced it with a factory replacement, which supposedly were improved, and it's been good for the last twenty years. I don't see these as having anything to do with the amount of blow-by you may be getting...
Reply With Quote
  #3  
Old August 2nd, 2020, 07:30
Saudade's Avatar
Saudade Saudade is offline
NAXJA Member
 
Join Date: May 2005
Location: SoCal
Posts: 2,281
Re: Headers or Manifold for 91XJ Daily Driver

Whatever you decide, check your motor mounts.
__________________
1988 Laredo 2wd Auto, AKA "Grey Ghost", 206K
Reply With Quote
  #4  
Old August 2nd, 2020, 07:34
RCP Phx RCP Phx is offline
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 13,806
Re: Headers or Manifold for 91XJ Daily Driver

...... and your exhaust mounts!
Reply With Quote
  #5  
Old August 2nd, 2020, 10:28
xjerod's Avatar
xjerod xjerod is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: maryland
Posts: 11
Re: Headers or Manifold for 91XJ Daily Driver

Do you think the mounts will get in the way?
Reply With Quote
  #6  
Old August 2nd, 2020, 11:19
Saudade's Avatar
Saudade Saudade is offline
NAXJA Member
 
Join Date: May 2005
Location: SoCal
Posts: 2,281
Re: Headers or Manifold for 91XJ Daily Driver

More often than not, bad motor mounts can lead to a cracked exh manifold. As the engine rocks more under changing load, it applies more force against the exhaust and it's other mounts since they are all solid mounts. One of the mods I've seen (but not done myself) is to patch in some exhaust flex pipe where the pipe crosses under the trans.
__________________
1988 Laredo 2wd Auto, AKA "Grey Ghost", 206K
Reply With Quote
  #7  
Old August 2nd, 2020, 12:31
xjerod's Avatar
xjerod xjerod is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: maryland
Posts: 11
Re: Headers or Manifold for 91XJ Daily Driver

ok that makes sense.. and now I know why some manifolds have a flex section built into them.
Thanks
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
NEED DAILY DRIVER UNDER $2,000 94xjva South East Chapter 8 February 23rd, 2010 09:10
replacement manifold or headers? whatevah OEM Tech Discussion 2 August 28th, 2007 20:49
Anyone in NC/VA need a daily driver? Puma297 For Sale: Private Party Only. XJ ITEMS ONLY 0 January 29th, 2007 17:45
New guy, help with Daily driver Alwinearcher Modified Tech Discussion 17 July 24th, 2006 05:08
Tow Rig/Daily Driver for under 10K XJdePlato Non-Tech / Off Topic 16 April 20th, 2006 19:32


All times are GMT -7. The time now is 00:16.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014