View Poll Results: How many miles on your 0331 header AND did it crack?
< 50,000 miles; still fine.
6
2.05%
< 50,000 miles; cracked!
1
0.34%
50,000 - 100,000 miles; still fine.
32
10.96%
50,000 - 100,000 miles; cracked!
13
4.45%
100,000 - 150,000 miles; still fine.
89
30.48%
100,000 - 150,000 miles; cracked!
34
11.64%
150,000 - 200,000 miles; still fine.
69
23.63%
150,000 - 200,000 miles; cracked!
16
5.48%
> 200,000 miles; still fine.
28
9.59%
> 200,000 miles; cracked!
4
1.37%
Voters: 292. You may not vote on this poll
How often do 0331 cylinder heads crack? Please vote if you have a late '99 to '01 XJ
12-25-2016, 12:03 PM
#122
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Join Date: Nov 2016
Location: Colmbus, MS
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Year: 2000
Model: Cherokee
Engine: 4.0 I6
Cracked
2000 XJ head cracked at 173k, and some change. No coolant in the oil. When I took the head to the head shop, the mechanic said it was a very minor crack. Had him fix it and go through the rest of the head. Got it back on now. Actually runs better than it did before it cracked!!
Last edited by Carter310; 12-25-2016 at 12:25 PM.
01-01-2017, 01:26 PM
#123
Seasoned Member
Join Date: Sep 2014
Location: Pasadena, Md.
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Year: 94
Model: Cherokee (XJ)
Engine: 4.0 H.O.
ok did the combustion test, fluid stayed blue for longer than test required. But with engine warm decided to run pressure test again. Leaking out head gasket between 4 and 5 on passenger side. Now with no combustion gas in cooling system, do I take the chance of just leaking head gasket, or just change it out completely? I found an aluminum one made by American cylinder head for 454.00 complete with valves.
01-01-2017, 01:32 PM
#124
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Join Date: Feb 2016
Location: Northern New Mexico
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Year: 1999
Model: Cherokee
Engine: 4.0
ok did the combustion test, fluid stayed blue for longer than test required. But with engine warm decided to run pressure test again. Leaking out head gasket between 4 and 5 on passenger side. Now with no combustion gas in cooling system, do I take the chance of just leaking head gasket, or just change it out completely? I found an aluminum one made by American cylinder head for 454.00 complete with valves.
01-04-2017, 06:06 PM
#130
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Join Date: Jan 2017
Location: usa
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Year: 2000
Model: Cherokee
Engine: 6 cylinder
My 2000 XJ heads were just fine at around 300K. The engine also ran great with decent oil psi. But At that time i dumped a Chrysler crate engine in it only because of a mysterious engine tick. Best i can figure, it was a wrist pin but that tick drove me crazy.
08-13-2018, 10:46 AM
#133
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Location: PA
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Year: 1997
Model: Cherokee
Engine: 4.0L
Distributor = 0630
Coil packs = 0331
I believe the WJ had the 0331 in 99, but not the XJ. If your XJ do have the 0331, theyre transplants. Not that there is anything wrong with that.
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