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99 Explorer X with odd chirp

mstrmp3

Member
Joined
June 19, 2006
Messages
21
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City, State
Charlotte, NC
Year, Model & Trim Level
99 XL 4-dr 4x4 OHV
Odd squeak/chirping on startup. My 99 Explorer with 4.0L OHV with 113K just started to have squeaking/chipring when I first start the motor. I goes away after about 45sec-1min. The wierd part is that it sounds like it's coming from the top/rear of the motor. It's not any pulley or belt in the front.

Any suggestions?

ps...the sound goes up with engine RPM
 






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