I6 300 chirping
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Senior User
Joined: Jan 2008
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From: Issaquah, WA
I6 300 chirping
My 300 I6 ('84 Bronco) is making a chirping noise that follows the engine speed and appears when the engine is warmed up. The chirping happens w/o any belts attached, so I'm kind of lost as to the source. I saw mention of rockers, but I can't detect any of chirping noise coming from the oil file hole either. The chirping is much louder than in the video after its been driven for a while
Any ideas of what else to check?
Any ideas of what else to check?
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Senior User
Joined: Jan 2008
Posts: 105
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From: Issaquah, WA
Thank you. Since posting that, I've narrowed it down to the balancer/front main area. The crank timing cover seal appears to be leaking a little bit of oil too. I'm working up to replacing the balancer and timing cover seal.
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Joined: Jan 2008
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From: Issaquah, WA
For posterity's sake:
I'm 99% certain the timing cover crank seal was the problem. I've put about 50 miles on it, and the chirping noise is gone.
I replaced the timing cover seals and harmonic balancer. The previous harmonic balancer looked fine. The rubber was still pliable, and there was no obvious reason for it to be causing the chirping.
Thanks everyone for the help. I appreciate it!
I'm 99% certain the timing cover crank seal was the problem. I've put about 50 miles on it, and the chirping noise is gone.
I replaced the timing cover seals and harmonic balancer. The previous harmonic balancer looked fine. The rubber was still pliable, and there was no obvious reason for it to be causing the chirping.
Thanks everyone for the help. I appreciate it!
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Joined: Dec 2007
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From: Boise, Idaho
I wonder if the timing cover wasn't 100% centered. It wasn't offset enough to chew through the seal, but was enough to cause a rubbing (chirp).
Either way, glad to hear that seemed to take care of it, and thanks for updating us on your success!
Either way, glad to hear that seemed to take care of it, and thanks for updating us on your success!
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