99X weird noise
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Freshman User
Joined: Jan 2003
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From: Minnesota
99X weird noise
When I shut of my truck I hear a poping noise coming from under the passenger side dash on my X. I'm wondering if there is a air pocket in the radiator system. I hear the heads leak on 99 expedition. It that true? TIA
Please respond...........People like to read but no one will help a fellow ford enthusiast out.
Please respond...........People like to read but no one will help a fellow ford enthusiast out.
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Joined: Apr 2001
Posts: 3,818
Likes: 3
99X weird noise
Coolant leakage from the passenger side head gasket has been an issue with many of the '99's with the 5.4l engine. There is a long thread on this subject that can be accessed by the search feature in this forum.
Re: the popping noise, is this intermittent, continuous or just occasional? One guess would be a malfunctioning vacuum motor on the climate control system if the noise is related to HVAC use and is intermittent.
Air in the coolant system generally manifests itself as a series of gurgling noises in the heater core. An intact system will self-purge introduced air. A low coolant level will also generate the same noise.
Re: the popping noise, is this intermittent, continuous or just occasional? One guess would be a malfunctioning vacuum motor on the climate control system if the noise is related to HVAC use and is intermittent.
Air in the coolant system generally manifests itself as a series of gurgling noises in the heater core. An intact system will self-purge introduced air. A low coolant level will also generate the same noise.
Last edited by aerocolorado; Jan 22, 2003 at 11:07 AM.
