Rod Knock Diagnosis
08-22-2011, 02:24 AM
#16
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Year: 1996+ 1999
Model: Cherokee
Engine: 4.0L I6
I wont let it go to scrap because its mine if i have to ill borrow a trailer and take it with me to school. Its my baby its not going anywhere.
08-22-2011, 02:30 AM
#17
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Your best bet is probably a jy motor.... but if you do the tear down and clean the block machine work is not too bad... maybe 300.... shouldn't have to have it sleeved.... just bore .030 over... unless your cylinder is mangled... nice jeep btw
Last edited by Slick761; 08-22-2011 at 02:33 AM.
08-23-2011, 09:39 AM
#18
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Year: 1996+ 1999
Model: Cherokee
Engine: 4.0L I6
Thanks.
Well yesterday I went and looked at a xj motor. Its cranking but not starting. We ran a scan tool on it and it appears its just the crank sensor. Because the engine just wont spark. So im bringing my crank sensor over there after work today and we will see. The engine has 230xxx on it but its got great compression and he only wants 300$ for the whole thing. I would get the manifold the pumps altanator... everything. $250 if we take it our ourselves.
Got my fingers crossed!
Well yesterday I went and looked at a xj motor. Its cranking but not starting. We ran a scan tool on it and it appears its just the crank sensor. Because the engine just wont spark. So im bringing my crank sensor over there after work today and we will see. The engine has 230xxx on it but its got great compression and he only wants 300$ for the whole thing. I would get the manifold the pumps altanator... everything. $250 if we take it our ourselves.
Got my fingers crossed!
08-23-2011, 01:14 PM
#20
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Year: 1991
Model: Cherokee
Engine: 4.0L
Hope you get it fixed. Pick and pull is great if you have one nearby. Either way, just fix it, don't scrap it! Though I have not done it myself replacing a motor on an XJ should not be too hard. Everything is pretty easy to get to.
10-14-2018, 02:39 AM
#21
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Model: Cherokee (XJ)
Knock 99 Grand Cherokee
Do you drive an automatic? If so i bet that the torque converter bolts came loose. You can google it to find out how to check them and tighten them.
Hows your oil pressure? A bad rod knock will have very low oil pressure and kill a motor very quickly by sending the rod thru the side of the engine block.
Hows your oil pressure? A bad rod knock will have very low oil pressure and kill a motor very quickly by sending the rod thru the side of the engine block.
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