Knocking
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Knocking
I have a "97" Merc Mountaineer AWD with a 302V8 with 85,000 on it... its a charm but i am getting a lower engine knock.? not sure what it is. I claimed it as a cold startup knock. but it is over 45 degrees here now. Does anyone have a idea to what this would be.. i have just replaced the "Manifold tube" and that took care of part of the noise. but i am still getting a "tick a tick a tick" noise... front driver side is where the most noise is. PLEASE HELP
Thank You all for the HELP
Brad R...
Thank You all for the HELP
Brad R...
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From: Kansas City
Welcome to FTE,
I have a couple questions to try to pinpoint where it's coming. Does the tick tick noise stay after it's warm? does it seem pretty consistant with rpm? Does it change volume or pitch with RPM?
Sounds like either the start of an exhaust leak, of a lifter. Both of those are usually described as ticks. a knock is usually much worse and sounds closer to a regular hammer blow on the block.
You can use a long screwdriver, or similar as stethascope. Listen to the head, the block, and the manifold to see where it's loudest.
I have a couple questions to try to pinpoint where it's coming. Does the tick tick noise stay after it's warm? does it seem pretty consistant with rpm? Does it change volume or pitch with RPM?
Sounds like either the start of an exhaust leak, of a lifter. Both of those are usually described as ticks. a knock is usually much worse and sounds closer to a regular hammer blow on the block.
You can use a long screwdriver, or similar as stethascope. Listen to the head, the block, and the manifold to see where it's loudest.
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Yes my engine does have a non-consistent tick.. it stayss when it is warm too.. i had a friend of mine tell me to try replaceing the oil pressure sending unit? Y/N?? and if so, where would that be located at?
thanks Brad R
thanks Brad R
Last edited by Mercury Mountain; Feb 7, 2005 at 12:33 PM. Reason: adding in more info
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From: Kansas City
Does the oil gauge work? It should either be low or mid-range, thats all it does.
The oil sending unit is just in front of the oil filter, but Its not making the tick noise.
you gotta be more specific, does it change with rpm, tick...... tick.......tick , and then tck,tck,tck,tck,tck? does the pitch, or intensitie change? why do you call inonsistant?
The oil sending unit is just in front of the oil filter, but Its not making the tick noise.
Yes my engine does have a non-consistent tick.
Last edited by clstrfbc; Feb 7, 2005 at 08:48 PM.
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Sorry new to this.. First. the oil gauge does work...
2nd..The ticking does change with rpm. At slower rpms it sometimes just all together stops.(Tick Tick............tick tick tick.......tick) (inconsistent) At higher RPM's it will tck,tck,tck,tck. again then stop.(same as above) over 3500rpms you really cant hear much but the engine reving.... i hope this helps out a lttle bit more than the last info i gave. thanks Brad
2nd..The ticking does change with rpm. At slower rpms it sometimes just all together stops.(Tick Tick............tick tick tick.......tick) (inconsistent) At higher RPM's it will tck,tck,tck,tck. again then stop.(same as above) over 3500rpms you really cant hear much but the engine reving.... i hope this helps out a lttle bit more than the last info i gave. thanks Brad
Originally Posted by clstrfbc
Does the oil gauge work? It should either be low or mid-range, thats all it does.
The oil sending unit is just in front of the oil filter, but Its not making the tick noise.
you gotta be more specific, does it change with rpm, tick...... tick.......tick , and then tck,tck,tck,tck,tck? does the pitch, or intensitie change? why do you call inonsistant?
The oil sending unit is just in front of the oil filter, but Its not making the tick noise.
you gotta be more specific, does it change with rpm, tick...... tick.......tick , and then tck,tck,tck,tck,tck? does the pitch, or intensitie change? why do you call inonsistant?
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From: Kansas City
No sweat, that description helps a lot more.
Well, its all but impossble to say without actually hearing. If it was the exhaust I would expect it to get louder with more gas. Sounds most like a lifter. Maybe someone else will have a way to describe the difference of sounds.
You can use a long screwdriver, a piece of a broomstick as stethascope. Put one end on the part you want to listen to and the other on against your ear. You can hear a lot more focused like this.
You should try the block, the head, and the manifold to see where it's loudest. Be sure to wear tight clothing (sleeves, no hanging scarves or strings) and stay away from the belt.
Well, its all but impossble to say without actually hearing. If it was the exhaust I would expect it to get louder with more gas. Sounds most like a lifter. Maybe someone else will have a way to describe the difference of sounds.
You can use a long screwdriver, a piece of a broomstick as stethascope. Put one end on the part you want to listen to and the other on against your ear. You can hear a lot more focused like this.
You should try the block, the head, and the manifold to see where it's loudest. Be sure to wear tight clothing (sleeves, no hanging scarves or strings) and stay away from the belt.
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Thank You
Thank you. I will try that and get back to all with (hopefully) more info
Brad R. .
Brad R. .
Originally Posted by clstrfbc
No sweat, that description helps a lot more.
Well, its all but impossble to say without actually hearing. If it was the exhaust I would expect it to get louder with more gas. Sounds most like a lifter. Maybe someone else will have a way to describe the difference of sounds.
You can use a long screwdriver, a piece of a broomstick as stethascope. Put one end on the part you want to listen to and the other on against your ear. You can hear a lot more focused like this.
You should try the block, the head, and the manifold to see where it's loudest. Be sure to wear tight clothing (sleeves, no hanging scarves or strings) and stay away from the belt.
Well, its all but impossble to say without actually hearing. If it was the exhaust I would expect it to get louder with more gas. Sounds most like a lifter. Maybe someone else will have a way to describe the difference of sounds.
You can use a long screwdriver, a piece of a broomstick as stethascope. Put one end on the part you want to listen to and the other on against your ear. You can hear a lot more focused like this.
You should try the block, the head, and the manifold to see where it's loudest. Be sure to wear tight clothing (sleeves, no hanging scarves or strings) and stay away from the belt.
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