Scraping noise behind dash after accelerating
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Scraping noise behind dash after accelerating
2005 SuperCrew Lariat 5.4
When I accelerate from a stop, I hear a scraping sound behind the dash for a few seconds.
Imagine what it would sound like if your keys scraped along the hard plastic as they swung back an forth. That’s kind of what it sounds like, only inside the dash, low - like behind the steering wheel.
(It’s not the keys...)
happens when AC is on or off. Doesn’t seem related to the HVAC.
Any clues what what that might be?
When I accelerate from a stop, I hear a scraping sound behind the dash for a few seconds.
Imagine what it would sound like if your keys scraped along the hard plastic as they swung back an forth. That’s kind of what it sounds like, only inside the dash, low - like behind the steering wheel.
(It’s not the keys...)
happens when AC is on or off. Doesn’t seem related to the HVAC.
Any clues what what that might be?
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New User
Joined: Aug 2019
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I did recently get a coolant flush, and I can’t recall if it’s new since then or not. But it happens every time I accelerate.
Any my way to test that theory and eliminate air in the coolant lines?
Senior User
Joined: Oct 2018
Posts: 379
Likes: 1
From: Texas
Hm, no idea. Would that still make sense to only hear that on acceleration?
I did recently get a coolant flush, and I can’t recall if it’s new since then or not. But it happens every time I accelerate.
Any my way to test that theory and eliminate air in the coolant lines?
I did recently get a coolant flush, and I can’t recall if it’s new since then or not. But it happens every time I accelerate.
Any my way to test that theory and eliminate air in the coolant lines?
Elder User
Joined: Aug 2018
Posts: 579
Likes: 7
From: Riverbank, CA.
Hm, no idea. Would that still make sense to only hear that on acceleration?
I did recently get a coolant flush, and I can’t recall if it’s new since then or not. But it happens every time I accelerate.
Any my way to test that theory and eliminate air in the coolant lines?
I did recently get a coolant flush, and I can’t recall if it’s new since then or not. But it happens every time I accelerate.
Any my way to test that theory and eliminate air in the coolant lines?
Fleet Mechanic
Joined: Jan 2007
Posts: 1,293
Likes: 18
Note the hot coolant level in the surge tank and compare it to the cold level the next morning. If the hot fluid is expanding and the cold fluid is being drawn back into the engine by vacuum, the system is tight and air pockets will work their way out over time.
If this is not happening, the system is open and will have air in it. Since somebody messed with the cooling system recently, I'd say that's the most likely source of the problem. If you have low coolant, it will eventually all go into the engine from the surge tank so keep it up to the 'cold level' by adding fluid of the same type mixed with distilled water.
Maybe its just a loose clamp. If you have any replacement screw clamps I can guarantee you at least one is loose - there is no substitute for the factory spring clamp.
If this is not happening, the system is open and will have air in it. Since somebody messed with the cooling system recently, I'd say that's the most likely source of the problem. If you have low coolant, it will eventually all go into the engine from the surge tank so keep it up to the 'cold level' by adding fluid of the same type mixed with distilled water.
Maybe its just a loose clamp. If you have any replacement screw clamps I can guarantee you at least one is loose - there is no substitute for the factory spring clamp.
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