Engine trash?
#1
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Year: 1999
Model: Cherokee
Engine: 4.0L
Engine trash?
So a friend of mine recently purchased an '01 XJ. It has a bad tap when it was cold, but prior to purchasing it the PO had warmed the engine up so we didnt know had bad it really was. I figured since it was the bad casting head it had cracked. Well I have an wrecked '00 I picked up cheap to part out so yesterday we set about starting to swap the heads. Well today when we pulled his this is what I found
Cylinders 5 and 6 had coolant pooled in them and the rest are pretty well burnt up.
I'm guessing this engine is pretty much toast?
The engine I have in my part out '00 is in great shape and runs strong. Looking like I'm going to end up swapping it in my friends, just wanted to get a few opinions here. I'm not a mechanic and know just enough to get in trouble LOL
Thanks guys
Cylinders 5 and 6 had coolant pooled in them and the rest are pretty well burnt up.
I'm guessing this engine is pretty much toast?
The engine I have in my part out '00 is in great shape and runs strong. Looking like I'm going to end up swapping it in my friends, just wanted to get a few opinions here. I'm not a mechanic and know just enough to get in trouble LOL
Thanks guys
#2
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Year: 1987
Model: Cherokee
Engine: I6
Depends how long it was run like that. Bearings could be trash. Only way to know is pull the pan off to check rod bearings and then check cam bearings. If the bearings are in good shape I would clean it up and replace the head. I don't have a spare motor though.
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Year: 1999
Model: Cherokee
Engine: 4.0L
Yea that's my problem. I think it would just be easier to drop the other engine in and it's got 60K less miles on it than his current one. I have a set of rod and main bearings laying around too so I could go through the current one and rebuild it. Decisions decisions..............
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
If it was running with anything like that I would think there would be a huge cloud of steam! Also I don't remember any 'ticking" coolant leaks. Did you drain the coolant before you pulled the head? Is the oil milky like it ran with coolant, or is there coolant separated in bottom of the pan?
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Year: 1987
Model: Cherokee
Engine: I6
Yea that's my problem. I think it would just be easier to drop the other engine in and it's got 60K less miles on it than his current one. I have a set of rod and main bearings laying around too so I could go through the current one and rebuild it. Decisions decisions..............
#6
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Year: 1999
Model: Cherokee
Engine: 4.0L
If it was running with anything like that I would think there would be a huge cloud of steam! Also I don't remember any 'ticking" coolant leaks. Did you drain the coolant before you pulled the head? Is the oil milky like it ran with coolant, or is there coolant separated in bottom of the pan?
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#11
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Year: 1993
Model: Cherokee
Engine: 4.0
I think most people dont realize that there is coolant left in the head when u take it off. You have to drain the block to get it all out. it pours into the cyclinder the second you lift the head up.
#13
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Year: 1993
Model: Cherokee
Engine: 4.0
Its not that difficult. You need a pair of vice grips, a good ratchet set, some extensions and a torque wrench (reinstallation). drain the coolant, remove the thermostat housing and hold it out of the way. remove the intake/exhaust manifold, remove valve cover, loosen or remove the rockers and carefully pull out the rods then remove the head bolts. use 1"tape around the rear head bolt to hold it up out of the block because it wont come out due to clearance of the firewall. Then just lift the head up and forward. Keep track of where every bolt went and keep track of where the rods came out of. I used a small cardboard box to stab them into in order.
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