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Old 03-21-2011, 11:41 AM   #1 (permalink)
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I have a '02 Sonata with a 2.4l and the balance shaft belt broke. The timing belt is fine, but of course i will be replacing it too. My question is, did I do any engine damage since just the balance shaft belt broke?
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Old 03-21-2011, 11:57 AM   #2 (permalink)
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welcome to the forums

the balance belt would not cause any damage
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Old 03-21-2011, 12:22 PM   #3 (permalink)
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QUOTE (JChaps @ Mar 21 2011, 11:41 AM)
Quote:
I have a '02 Sonata with a 2.4l and the balance shaft belt broke. The timing belt is fine, but of course i will be replacing it too. My question is, did I do any engine damage since just the balance shaft belt broke?
If it is driveable currently other than odd vibration/noise, consider yourself extremely lucky..

Typically when balance shaft breaks, it gets betweeh crank cog and timing belt and engine spins right on by and crash valves.. and it gets caught by the rotor and bends ear, and breaks the crank position sensor in pieces.

Replace timing belt, balance belt, hydraulic tensioner, and 2 drive belts.. if high mileage, add misc idle pulleys for the timing belt.
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Old 03-22-2011, 01:45 PM   #4 (permalink)
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Thanks for the info. I did find that when the balance shaft broke it must have made the timing belt slip 3 teeth because the exhaust cam gear was off timing by that many teeth. I checked the compression and each cylinder had about 135 psi. Again thanks for the information.
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