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 September 25th, 2021, 01:33
Dreamliner787 Dreamliner787 is offline
NAXJA Forum User
 
Join Date: May 2021
Location: Doha, Qatar
Posts: 7
Cylinder walls after blown head gasket

Hello all,

I had an overheat with my XJ these days... It has an engine that was remmaned and came from my TJ. The engine was oversized by 0.20 about 10.000km ago and has a performance camshaft stated as stage 1 by Cleggs Engines (I don't know the specs)

It worked OK on the TJ although it desperately needed tuning for the camshaft but that's very hard to find in Qatar, where I live.

I then got the XJ and decided to use the new engine on it, but with a smaller radiator in bad shape and poor cooling, it overheated and blew the gasket.

When the mechanic removed the head for inspection, he found the situation shown on the images attached and I was very disappointed with the cylinder situation.

Could that be because of the overheat of is it just poor assembly from the overhaul?

Before I close the engine with a milled head and new gasket, should I be concerned and do something about these cylinders?

Thanks in advance for any advice.

Best Regards!





Reply With Quote
  #2  
Old September 25th, 2021, 01:33
Dreamliner787 Dreamliner787 is offline
NAXJA Forum User
 
Join Date: May 2021
Location: Doha, Qatar
Posts: 7
Re: Cylinder walls after blown head gasket

Reply With Quote
  #3  
Old September 25th, 2021, 01:34
Dreamliner787 Dreamliner787 is offline
NAXJA Forum User
 
Join Date: May 2021
Location: Doha, Qatar
Posts: 7
Re: Cylinder walls after blown head gasket

Having trouble attaching the images

https://os5.mycloud.com/action/share...2-ef4544fe8c21
Reply With Quote
  #4  
Old September 25th, 2021, 01:35
Dreamliner787 Dreamliner787 is offline
NAXJA Forum User
 
Join Date: May 2021
Location: Doha, Qatar
Posts: 7
Re: Cylinder walls after blown head gasket

https://os5.mycloud.com/action/share...9-bdf81f65eb23

https://os5.mycloud.com/action/share...6-1c4889e5a349
Reply With Quote
  #5  
Old September 25th, 2021, 06:19
Unclewolverine Unclewolverine is offline
NAXJA Forum User
 
Join Date: Jun 2019
Location: Kansas
Posts: 567
Re: Cylinder walls after blown head gasket

That's a pretty nasty scuff, if you got the time and funds a good hone and set of rings would be the minimum recommendation, if not a new set of pistons. That being said these are some of the most forgiving engines around, (other than sub par cooling systems!) So it is entirely possible it may be okay. Maybe someone else here has had this happen.
Reply With Quote
  #6  
Old September 25th, 2021, 08:13
RCP Phx RCP Phx is offline
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 15,360
Re: Cylinder walls after blown head gasket

That scoring/dis-coloration around the wrist pin area would deeply concern me.
Reply With Quote
  #7  
Old September 25th, 2021, 11:47
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,619
Re: Cylinder walls after blown head gasket

Could that scuffing be the result of overboring and not using oversized pistons? 20-thou seems like it's on the edge of needing to upsize the pistons.
Reply With Quote
  #8  
Old September 29th, 2021, 10:40
Black1990jeep Black1990jeep is offline
NAXJA Forum User
 
Join Date: Apr 2018
Location: california
Posts: 868
Re: Cylinder walls after blown head gasket

wrist pins are an issue here, you may need new parts there. hoping the wrist pin marks on the bore are not deep.

Your pistons should be removed and all the piston, pin and bore tolerances checked. Id not reassemble as is.
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
Cracked head, blown gasket, head swap questions xjtrailrider OEM Tech Discussion 19 May 23rd, 2016 20:03
F/S in MA: 1997 4.0 w/109k, blown head gasket and likely cracked head JrTxJ NAC Classifieds 8 November 29th, 2014 18:29
Blown motor? Cracked head? Head gasket? Cobrajay Modified Tech Discussion 3 October 1st, 2009 06:54
Blown Head Gasket or Cracked Head?? xthejuicex OEM Tech Discussion 7 August 26th, 2009 19:24
Blown head gasket or Cracked head? SpenceXJ OEM Tech Discussion 11 July 28th, 2009 13:09


All times are GMT -7. The time now is 00:45.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014