ticking time bomb - please input
08-09-2010, 11:08 AM
#1
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Year: 1997
Model: Cherokee
Engine: 4.0 bullet proof
ticking time bomb - please input
Just recently there has been a ticking noise coming from my engine compartment when driving. Its a 4.0 with 204k, runs strong, doesnt sputter or stall. All gauges read normal when driving, however at lower RPMs the ticking is loud enough to be heard.
A buddy of mine said it could be either a bent valve, loose rocker arm, or a bearing within the motor. I know its hard to diagnose whats wrong with my jeep without hearing or seeing it, but has anyone had the same issue?
A buddy of mine said it could be either a bent valve, loose rocker arm, or a bearing within the motor. I know its hard to diagnose whats wrong with my jeep without hearing or seeing it, but has anyone had the same issue?
08-09-2010, 11:17 AM
#3
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Year: 1994
Model: Cherokee
Engine: l6 HO
Just recently there has been a ticking noise coming from my engine compartment when driving. Its a 4.0 with 204k, runs strong, doesn't sputter or stall. All gauges read normal when driving, however at lower RPMs the ticking is loud enough to be heard.
A buddy of mine said it could be either a bent valve, loose rocker arm, or a bearing within the motor. I know its hard to diagnose whats wrong with my jeep without hearing or seeing it, but has anyone had the same issue?
A buddy of mine said it could be either a bent valve, loose rocker arm, or a bearing within the motor. I know its hard to diagnose whats wrong with my jeep without hearing or seeing it, but has anyone had the same issue?
08-09-2010, 11:17 AM
#4
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Year: 1997
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Engine: 4.0 bullet proof
08-09-2010, 11:18 AM
#5
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will do. I think its coming from the back of the motor, cant really tell if the noise is coming from the top of the head. I'll see what I can catch on video tonight when I get off work.
08-09-2010, 11:42 AM
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Year: 1993, 1994
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Engine: 4.0L HO
Rod bearings are typically a more 'deep' sounding clank than a tick. Crank bearings tend to be a squealing noise. Ticking is usually lifters or other valvetrain noise. I disagree with it being a bent valve, if it was a bent valve you'd notice it do to the drop in compression from the valve not sealing properly anymore.
08-09-2010, 01:39 PM
#7
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Or it could be the start of an exhaust leak out of the manifold. I had the same thoughts as you when i first heard mine and could find nothing wrong but it got louder and louder till it was very obvious that it was an exhaust leak
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08-09-2010, 01:46 PM
#9
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Year: 1993, 1994
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Didn't think of that, but yes, it could be that. Plus I remember hearing something about the manifolds being prone to cracking at the welds.
08-09-2010, 03:50 PM
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Year: 1999
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Rod bearings are typically a more 'deep' sounding clank than a tick. Crank bearings tend to be a squealing noise. Ticking is usually lifters or other valvetrain noise. I disagree with it being a bent valve, if it was a bent valve you'd notice it do to the drop in compression from the valve not sealing properly anymore.
