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- Xref: sparky rec.autos:26647 rec.autos.tech:15368
- Path: sparky!uunet!stanford.edu!agate!usenet.ins.cwru.edu!po.CWRU.Edu!aas7
- From: aas7@po.CWRU.Edu (Andrew A. Spencer)
- Newsgroups: rec.autos,rec.autos.tech
- Subject: Re: Noise when turning left -- mitigates when applying brake. Huh?
- Date: 13 Nov 1992 01:51:13 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 91
- Message-ID: <1dv1mhINNn0b@usenet.INS.CWRU.Edu>
- References: <1992Nov11.165508.22194@microware.com> <lfsuhaINNpip@utkcs2.cs.utk.edu> <1992Nov9.132014.28218@magnus.acs.ohio-state.edu> <1992Nov9.140346.18345@julian.uwo.ca> <1dmu5fINN43g@usenet.INS.CWRU.Edu>
- Reply-To: aas7@po.CWRU.Edu (Andrew A. Spencer)
- NNTP-Posting-Host: slc5.ins.cwru.edu
-
-
- In a previous article, adam@microware.com (Adam Goldberg) says:
-
- >aas7@po.CWRU.Edu (Andrew A. Spencer) writes:
- >
- >
- >>In a previous article, bhhardy@cs.utk.edu (Barbara Hardy) says:
- >
- >>>
- >>>I have an 85 Dodge Omni/2.2L front wheel drive, 112K miles.
- >>>
- >>>When driving straight ahead, the engine noise is a little louder than
- >>>it ought to be. This is in comparison to the engine noise when I am
- >>>turning left. It feels quite good then, no tension. As I bring the car
- >>>back to straight ahead, the noise increase. It gets positvely
- >>>annoyingly and scarily loud when I turn to the right, and the noise
- >>>"feels" more "tense."
- >>>
- >>>I was driving on many miles on winding road yesterday, and I got to
- >>>experiment a little with it. Turns out that when I apply the brakes,
- >>>the noise drops quite noticebly (sp)!
- >>>
- >>>Any clues as to what this could be?
- >>>
- >>constant velocity joint sounds like my first guess w/o seeing it?..
- ~~~~~~~~~~~~~
- this means w/o having first hand knowledge.
-
- >>anyone?
- ~~~~~~~~~
- this means does anyone else have a clue, because i've just given my one
- and only clue on this particular subject away...and..well..i don't know
- that it was a very good clue at that....
- (take notes..test later!)
- >
- >Aha!
- >
- >Although noises changing when turning often means a CV joint, the noise
- >is generally described as a clicking noise. More often than not it
- >is very hard to hear without sticking your head out the window, or
- >driving next to a sound-reflective surface (wall). I'll admit, however,
- >that the Omni's CV joints are easier to hear than most when they go bad,
- >since the car is farily small and econo-box-like.
- >
- >But! (sorry, got sidetracked), this problem sounds like an exhaust
- >problem. Clues:
- >
- >o '...driving straight ahead...engine noise...louder (compared to)
- > engine noise...turning left'
- >
- >o '...bring the car...straight ahead (from left), the noise increase'
- >
- >o '...positively loud...turn to right'
- >
- >o 'apply brakes...noise drops noticeably'
- >
- >No mention of clicking, and CV joines will generally make the noise when
- >turned EITHER way.
- >
- >In this car, the exhaust manifold pipe (the pipe immediately AFTER the
- >exhaust manifold) is held to the manifold by two springs around screws
- >with a gasket in between the pipe and the manifold. This allows the
- >pipe to shift when the engine shifts (without breaking) as it
- >generally does when accelerating, breaking or turning.
- >
- >Consider what would happen if the right-hand screw has rusted away:
- >
- >When the car turns to the left, the engine shifts right, holding the
- >joint between the manifold and the pipe closed (and the car quiet).
- >
- >When the car is going straight, the engine is not shifting, and there
- >is a slight gap between the pipe and the manifold (and the car is
- >slightly noisy).
- >
- >When the car is turning right, the engine shifts left, opening the gap
- >(and the car is loud).
- >
- >When braking, the engine twists backward (the top moves slightly
- >closer to the driver), closing the gap and quieting the car.
- >
- >I'd take the car to an exhaust shop.
- >
- >(Let me know if I'm right!)
-
- ok boyz and girlz..remember the stuff i mentioned later..?
- well...
- DREW
- --
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- ?????????????????????????????????-----whatever!
-