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EDIT: I hope the term "gurgling" isn't misleading. This noise doesn't seem to involve liquid of any kind. "Gurgling" may be replaced with monotone-like "growling" and very mechanical-like quality to it.
Did a tune up with new wires and plug last week on my 2001 DII. Trucks runs great with better performance and fuel economy. Power delivery is smooth and (more) refined. Engine is noticeably quieter except for...
However, my Disco has always had this annoying mechanical [growling] noise that is prevalent at idle and has gotten worse since the tuneup (or more noticeable).
The noise is definitely from the engine bay and is noticeable only at idle/low parking speeds. It has a deeper-note, mechanical "[growl]" quality to it that doesn't sound very refined. And it's kinda, actually very, annoying.
What could it be?
Note: I have also noticed that I have a coolant leak that hasn't been identified to a specific location *and* a rear-engine oil leak that becomes smoky and smelly once the oil hits the exhaust pipe below. No overheating. No weird temp changes in the a/c system or fans.
Did a tune up with new wires and plug last week on my 2001 DII. Trucks runs great with better performance and fuel economy. Power delivery is smooth and (more) refined. Engine is noticeably quieter except for...
However, my Disco has always had this annoying mechanical [growling] noise that is prevalent at idle and has gotten worse since the tuneup (or more noticeable).
The noise is definitely from the engine bay and is noticeable only at idle/low parking speeds. It has a deeper-note, mechanical "[growl]" quality to it that doesn't sound very refined. And it's kinda, actually very, annoying.
What could it be?
Note: I have also noticed that I have a coolant leak that hasn't been identified to a specific location *and* a rear-engine oil leak that becomes smoky and smelly once the oil hits the exhaust pipe below. No overheating. No weird temp changes in the a/c system or fans.