01 jeep no compression
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01 jeep no compression
I have a 01 jeep Cherokee with a 4.0 in it. there is no compression in any of the cylinders. the rocker arms are all moving I have replaced the cam and crank sensor along with the computer. I have checked the timing gears and the chain they are fine. this use to be my daily driver and ran well until the motor just shut off going to work one day. Help me please
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the compression is 0 on all cylinders .. I know it sounds crazy and thought my tester was bad so I put it on my other car to make sure it wasn't broke. the day it broke down it wouldn't go faster than 50 than quietly shut off. even now when I attempt to start it the engine isn't making any funny sounds
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Year: 1994 SE
Model: Cherokee
Engine: 4.0
Dang. This is out of my pay grade. Warped head? Cracked block? Both highly unlikely, but so is having 0 psi on all 6 chambers.
I'm sure someone that's more knowledgable will be along shortly to give some input.
I'm sure someone that's more knowledgable will be along shortly to give some input.
#7
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Year: 2000
Model: Cherokee
Engine: 4.0L
Usually having no compression at all happens when timing is off, but if yours is still right then I'd say the head or the engine itself is done. Did it overheat when it died?
Try doing a leakdown test instead of a compression test, takes the starter and other factors out of the equation. Parts stores should rent them
Try doing a leakdown test instead of a compression test, takes the starter and other factors out of the equation. Parts stores should rent them
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#9
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Bizarre. Assuming your measurements are correct, there's no way to really know without pulling the head, much less fix it.
Last time I saw zero across the board was a broken timing belt and bent intake valves..but neither apply to the 4.0
Last time I saw zero across the board was a broken timing belt and bent intake valves..but neither apply to the 4.0
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Exactly. NONE of those things have anything to do with compression.
Stop throwing parts at it.
Diagnose it. Test it. Have a REASON for what you are doing. You can't afford to spend hundreds of dollars doing things that can't possibly do any good.
I have to agree. Even if the engine had overheated badly and collapsed every ring in every cylinder, you'd still get SOME compression.
How did you check them? What did you check? If the chain slipped it might look fine, but you'd still be badly out of time.
What have you done to check the valve timing?
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