Smoking / knocking after water pump failure
#17
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Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
If it wasn't for the metal shavings I would say just replace the head gasket and see what happens, but metal in the oil means it's been in contact with all the bearing surfaces. No bueno.
You could still rebuild it with new bearings and everything or find a good used one. Or sell it as someone said
You could still rebuild it with new bearings and everything or find a good used one. Or sell it as someone said
Popping bearings into one is not going to fix anything. That's wishful thinking, and a waste of time and money.
#18
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Year: 94
Model: Cherokee
Engine: 4.0L I6
I just replaced my engine with a junkyard one for $650... had great compression and oil pressure. mileage is unknown
#19
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Year: 2000
Model: Cherokee
Engine: 4.0
Replace the engine oil, replace the thermostat and the coolant and make sure it's properly filled. If you don't hear any bottom end knocking sounds as you fill the radiator, then count your blessings and drive on. It takes a lot more than some metal shavings to kill these motors. Keep us posted.
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#20
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Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Replace the engine oil, replace the thermostat and the coolant and make sure it's properly filled. If you don't hear any bottom end knocking sounds as you fill the radiator, then count your blessings and drive on. It takes a lot more than some metal shavings to kill these motors. Keep us posted.
#22
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Year: 1990
Model: Cherokee
Engine: 4.0
Replace the engine oil, replace the thermostat and the coolant and make sure it's properly filled. If you don't hear any bottom end knocking sounds as you fill the radiator, then count your blessings and drive on. It takes a lot more than some metal shavings to kill these motors. Keep us posted.
The only loss is a little time and some oil to possibly dodge replacing/rebuilding the motor.
#24
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Year: 1990
Model: Cherokee
Engine: 4.0
Back to the issue: It is possible that the engine is toast, but when faced with a big repair a cheap test isn't out of order. BTW, no need to replace the thermostat or coolant as was suggested for a short test run. Just fill it with water and test. If the head gasket went but the engine doesn't knock or have other issues do the head gasket.
Last edited by '90Cherokee; 10-04-2015 at 09:53 PM.
#26
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Year: 1990
Model: Cherokee
Engine: 4.0
True, but I've seen engines with glitter oil that continued on for a long time. I have a Yamaha Vstar in my driveway right now that is one of those; lots of glitter, yet no notable issues. The engine must be compromised if there's visible metal in the oil, but it may not be done.
#27
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Year: 1999
Model: Cherokee
Engine: 4.0
That's like a guy I once knew who sold a car with a bad differential, sounded like crap. What he did was mix a bunch of saw dust into gear oil and force it into the differential, quiet yes it was. Two weeks later the guy he sold it to paid him a visit and beat the crap out of him including breaking his arm and jaw. The money he made off the deal did not nearly pay the hospital bill, no insurance and 3 mo. to heal back up.
It all depends on how much you want to beat a dead horse!
I've cut open filters for over 25 yrs on my race motors and if you see that kind of trash its time for a tear down, you waited to late for a simple fix.
It all depends on how much you want to beat a dead horse!
I've cut open filters for over 25 yrs on my race motors and if you see that kind of trash its time for a tear down, you waited to late for a simple fix.
Last edited by Fred/N0AZZ; 10-05-2015 at 11:07 AM.
#28
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Year: 2000
Model: Cherokee
Engine: 4.0L
By rebuild, I meant actually cleaning the block and honing out the cylinders, not just popping in bearings lol, thought that went without saying.
A good used engine is probably cheaper though, I picked up a 96 GC engine with ~150k miles for $300, but usually $500 is a good number.
A good used engine is probably cheaper though, I picked up a 96 GC engine with ~150k miles for $300, but usually $500 is a good number.
#29
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Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
You'd be surprised how many people on this forum, and others, think an oil and filter change, thermostat, and popping in bearings will fix catastrophic engine damage.