Odd engine noise
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2nd Gear
Joined: Jul 2025
Posts: 2
Likes: 0
Odd engine noise
I just purchased my 2004 Explorer a few weeks ago. I've fixed it up inside and tuned up the engine overall. However, when the vehicle is running, especially on acceleration, it makes a very odd noice. It sounds almost like metal teeth spinning.
My mechanic said he had never heard anything like it before and suggested it may be the timing chain guides slipping. Hopefully not, as this repair would likely cost more than the vehicle is worth. Any other ideas on what this could be. It's not valves and the engine runs perfectly.
My mechanic said he had never heard anything like it before and suggested it may be the timing chain guides slipping. Hopefully not, as this repair would likely cost more than the vehicle is worth. Any other ideas on what this could be. It's not valves and the engine runs perfectly.
Mountain Pass
Joined: Mar 2020
Posts: 209
Likes: 46
I just purchased my 2004 Explorer a few weeks ago. I've fixed it up inside and tuned up the engine overall. However, when the vehicle is running, especially on acceleration, it makes a very odd noice. It sounds almost like metal teeth spinning.
My mechanic said he had never heard anything like it before and suggested it may be the timing chain guides slipping. Hopefully not, as this repair would likely cost more than the vehicle is worth. Any other ideas on what this could be. It's not valves and the engine runs perfectly.
My mechanic said he had never heard anything like it before and suggested it may be the timing chain guides slipping. Hopefully not, as this repair would likely cost more than the vehicle is worth. Any other ideas on what this could be. It's not valves and the engine runs perfectly.
Logistics Pro
Joined: Jun 2009
Posts: 4,818
Likes: 83
From: Cedar Rapids, IA
Does the noise get louder with the oil fill cap removed? Have you had the oil changed recently, and if so, was anything unusual noticed with the oil? Maybe consider a used oil analysis to get an idea whether or not there are current or pending serious engine issues.
-Rod
-Rod
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