Chirp only at idle in gear
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From: Winnipeg
Chirp only at idle in gear
I've got an '08 4.0 6 cylinder SOHC Ranger, Sport 4x4 model, automatic.
Has about 240,000KM. Runs really nicely, but I have a little bird-esque chirp that only shows up occasionally, and only while idling in gear. It kinda sounds like a cheap computer fan squeaking, fast high pitch chirping. Immediately goes away when I apply the gas. Never hear it while driving. Never hear it while idling in Park, only while sitting at a red light. It goes away if I shift from Drive to Park, then comes back when I go back to Drive.
Seems to me like it's originating toward the passenger side of the engine bay. I first thought it was an idler pulley bearing, but it sounds to me like it's coming from the back of the engine bay. My first thought was the cam synchronizer issue so many rangers have, but then realized that isn't a SOHC issue as my engine doesn't have one!
Are there other common possibilities, or things to look for?
Has about 240,000KM. Runs really nicely, but I have a little bird-esque chirp that only shows up occasionally, and only while idling in gear. It kinda sounds like a cheap computer fan squeaking, fast high pitch chirping. Immediately goes away when I apply the gas. Never hear it while driving. Never hear it while idling in Park, only while sitting at a red light. It goes away if I shift from Drive to Park, then comes back when I go back to Drive.
Seems to me like it's originating toward the passenger side of the engine bay. I first thought it was an idler pulley bearing, but it sounds to me like it's coming from the back of the engine bay. My first thought was the cam synchronizer issue so many rangers have, but then realized that isn't a SOHC issue as my engine doesn't have one!
Are there other common possibilities, or things to look for?
When engine is stone COLD, after sitting over night for example, you can remove the fan belt from crank pulley and start the engine.
The Battery light will stay on, no alternator, and water pump will not be turning, so only run the engine for 2 MINUTES MAXIMUM, then shut it off.
What this does is make the engine bay VERY quiet because there is no Fan turning.
So you can listen for the noise and locate it
If there is no noise then shut off the engine and start spinning the pulleys manually, this is most likely where the noise is coming from
The Battery light will stay on, no alternator, and water pump will not be turning, so only run the engine for 2 MINUTES MAXIMUM, then shut it off.
What this does is make the engine bay VERY quiet because there is no Fan turning.
So you can listen for the noise and locate it
If there is no noise then shut off the engine and start spinning the pulleys manually, this is most likely where the noise is coming from
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shooterdude199
General Ford Ranger Discussion
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Dec 4, 2010 03:05 PM
