Lets say i accelerate and let go of the gas... and let the car decelerate.. i get this strange hollow sounding groan .. its hard to explain.. but it sounds like it may be coming from under the valve cover(from what i can tell from inside the car anyway).. U can also hear it if you just revv the engine when the car is stopped.. and when u let the rpms fall.. you get the noise. it sounds hollow.
Is this valve noise? Needs valve adjustment?
I had my 60k mile service at honda a couple months ago.. and valve adjustment was on there pre printed "to-do list" but im not sure they did it... i have no way of knowing if the valves were ever adjusted...
its a 97 base 5 speed with 65k miles.
sean
__________________ Sean,
2005 Acura RSX Type S ----www.seansamson.net----
So is it for sure the auto tensioner? I have the same sound doing the exact same thing so if your mechanic says its the auto tensioner then i better get my car in....
i did a search and im amazed how everyone describes the sound the same... "as the rpms drop"... its all the same problem.. but how long can you drive it with this problem? it will eventually fail correct? im not taking the car in until i hit 75k for free warranty work and save $ for the labor...
__________________ Sean,
2005 Acura RSX Type S ----www.seansamson.net----
^^Anyway you could get a sound clip of this noise? Isn't it normal for the engine to sound different when letting off the gas? It's not supposed to sound the same as accelerating.
When you say "hollow groan", is there a slight rattling sound to it too? If so, I have (had) the exact same problem. Whenever I slowed down or came to a stop there was a hollow rattling sound (kind of like the heat shield was rattling) as soon as the rpms dipped below about 2k. I ha my oil changed a couple of months back and the problem went away. I don't think the two were associated, but maybe they found something when they changed the oil. In any event, I have no idea what the cause was.
My 94 VTEC made the same sound as my 98 SH when letting off the gas when cruising. 94 Preludes have manual tensioners...those never went bad did they (94's)?
its definately not the normal sound.. if i rev the engine while in the engine bay, let the rpms fall.. and put my ear next to the timing belt cover.. its definately rattling/knocking.... its very distinct. it sounds like something loose... like groaning rattle.
and about a video clip.. im not sure a camera would pic it up with the sound of the engine being so loud..
__________________ Sean,
2005 Acura RSX Type S ----www.seansamson.net----
Bringing the thread back from the grave, but does anyone know what this is? I recently changed my belts and auto tensioner, and getting the same exact thing. When I let the rmp drop, I can hear the noise as described below....
mstewar, thanks for the reply. i was getting afraid that people were just going to ignore my post...
yes, my balancer belt is on, isn't it supposed to be on???
do you think that's what's making this "shrrrrrr" noise when I let go of the gas and the rpm is coming down to around 1,500~2000? When I hold the rpm at that range, i can also hear the same noise...
i can only hear the noise when the car is fully warmed up...
i can't produce the noise after the car has been sitting for a while, if that makes any difference.
I think its your catalytic converter. I had mine replaced under similiar situations as yours. When I would decelerate I would hear a loud rattling. There was no problem accelerating. When I would push the clutch in I heard it also. Even if your car is automatic, if it makes that noise while decelerating, I strongly believe it could be the car. Does it rattle by any means?
__________________
2001 5 speed - MSD - AEM - DC Sports - H&R - Sold 2/22/06 =/
2003 Max SE TE 6mt- bought August 16th 2006
I think its your catalytic converter. I had mine replaced under similiar situations as yours. When I would decelerate I would hear a loud rattling. There was no problem accelerating. When I would push the clutch in I heard it also. Even if your car is automatic, if it makes that noise while decelerating, I strongly believe it could be the car. Does it rattle by any means?
It doesn't really "rattle", it's more of a "shrrr" sound, like if something was rubbing or something. Only does it for a split second.
Tbone-it could be the t-belt cover, but I would assume the noise would be more constant.... I will check it out though.
One thing that boggles me is that it only seem to do it when the car is fully warmed up....
I guess I didn't read clearly enough, I thought it was similar to what mine is doing.. rattles when dead cold and goes away after it warms up.. I don't have the balancer belt on though(putting it back on tonight), so I figure it's either a shaft or tensioner rattling until they warm up or are lubricated better with oil.. but yeah, your balancer belt should be on, according to the factory, but some people leave them off or remove the shafts to make a bit more power..
the noise may or may not be consistent if it's the t-belt cover.. it's just a matter of how "off" it is.. my best advice is to check that, and if it's not it, jack it up and put the front on stands and then climb underneath and give it a listen while someone else revs it for you.. if you have a stethascope, that will help in pinpointing it if it's coming from inside the cover or the motor itself..
this IS with the car out of gear right? how loud is it?
I guess I didn't read clearly enough, I thought it was similar to what mine is doing.. rattles when dead cold and goes away after it warms up.. I don't have the balancer belt on though(putting it back on tonight), so I figure it's either a shaft or tensioner rattling until they warm up or are lubricated better with oil.. but yeah, your balancer belt should be on, according to the factory, but some people leave them off or remove the shafts to make a bit more power..
the noise may or may not be consistent if it's the t-belt cover.. it's just a matter of how "off" it is.. my best advice is to check that, and if it's not it, jack it up and put the front on stands and then climb underneath and give it a listen while someone else revs it for you.. if you have a stethascope, that will help in pinpointing it if it's coming from inside the cover or the motor itself..
this IS with the car out of gear right? how loud is it?
that's what mine is doing, and what I suspect the culprit is. let me know what it turns out to be!
I guess I didn't read clearly enough, I thought it was similar to what mine is doing.. rattles when dead cold and goes away after it warms up.. I don't have the balancer belt on though(putting it back on tonight), so I figure it's either a shaft or tensioner rattling until they warm up or are lubricated better with oil.. but yeah, your balancer belt should be on, according to the factory, but some people leave them off or remove the shafts to make a bit more power..
the noise may or may not be consistent if it's the t-belt cover.. it's just a matter of how "off" it is.. my best advice is to check that, and if it's not it, jack it up and put the front on stands and then climb underneath and give it a listen while someone else revs it for you.. if you have a stethascope, that will help in pinpointing it if it's coming from inside the cover or the motor itself..
this IS with the car out of gear right? how loud is it?
Yes, it's when the car is out of gear.
Today, I noticed that the noise is getting softer... but maybe it'll come back again.
So it's not that loud, you probably wouldn't even notice it if you didn't know, but once you hear it, you can pick it up, if you know what i mean.
The "Shrrr" is the best I can do to describe the sound... just for a split second.
that's what mine is doing, and what I suspect the culprit is. let me know what it turns out to be!
the tensioner arm for the balancer belt was the culprit at a minimum.. the bolt that it pivots on was either loose or had backed out, allowing that arm to rattle against the stationary part of the tensioner.. I went ahead and put the balancer belt back on though.. car has noticeably less power, but drives smoother and idles nicer..
tsujiyoh, not sure what to tell you except that maybe it'll stay gone..?
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