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Unread 11-22-2012, 09:09 AM   #1
jlsalani
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2004 TJ Wrangler 
 
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Location: Oxford, Michigan
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rust gone, engine next

just finished fixing the rust problem on my son's 2000 Cherokee..... moving on to the engine next. What would you guys suggest?? I am going to clean it up and look for leaks. I might have a rear main leak or it is running down the back of the block. Not very much, doesn't even make it to the ground except for a drop or two. I am a bit concerned about the head. Read way too many postings about the 2000 head cracking issue. I haven't noticed too much coolant loss but there seems to be a little. Should I just replace it and be done with it?? If so, where should I go to buy one that won't have the same issue. If I replace, what should I do while I have it opened up?? Jeep runs good, but needs a clean up.

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Unread 11-22-2012, 09:30 AM   #2
CJ7-Tim
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2000 XJ Cherokee 
 
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Threads about cracked 0331 heads far exceed actual cracked 0311 heads. If it ain't broke, ....... Cooling system preventative maintenance would be a better idea that swapping heads. RMS leaks are common.
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Unread 11-22-2012, 09:33 AM   #3
austin6137
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1990 XJ Cherokee 
 
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Location: PA
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4.6 stroker
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90 - xj laredo- 4.5" rough country lift, 6.5" of total lift with drop brackets, zj disc brakes on c8.25, olympic winch bumper, jcr upper and lower quarter armor, IRO hack-n-tap and rock sliders and rear bumper. rugged ridge 8500lb winch. Spartan locker up front. With a jd yellow paint job, 97+ front end and bushwacker cut out flares. 35's
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Unread 11-22-2012, 07:38 PM   #4
DezertXj88
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1990 XJ Cherokee 
 
Join Date: Jan 2012
Location: somewhere in the dust, Ca
Posts: 789
4.2L mini stroker with a ported head & mid to high 9's for compression. Mines 9.2:1, stock cam at -4* vs factory -8*. Ported head LS1 valve train.. (2.00/1.55 valves turned down to 1.93/1.52) stock is 1.90/1.50
Anyway dynoed at 289/318 on a motor dyno running on 87oct. Not to shabby!
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Unread 11-22-2012, 08:14 PM   #5
bigbill888
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1998 XJ Cherokee 
 
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Quote:
Originally Posted by jlsalani View Post
I am going to clean it up and look for leaks. I might have a rear main leak or it is running down the back of the block. Not very much, doesn't even make it to the ground except for a drop or two. I am a bit concerned about the head.
My 96 4.0 ZJ used to leak oil from every place imaginable. After carefully cleaning up the CCV system, no mo leaks whatsoever.
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96 ZJ Laredo, 4.0, 242, 230K
95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
All work well
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