Guys - my car makes a noise between 15-25 MPH that sounds as if the exhaust has a hole in it somewhere.
I've had the exhaust checked over several times, no problem. The reason I've been given is a vibration at low revs that sets up a resonance between the exhaust and the suspension.
So, is this the case, does anyone have a similar tale or is this all spin and no substance?
Cheers
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Dan wrote:
>
> Guys - my car makes a noise between 15-25 MPH that sounds as
> if the exhaust has a hole in it somewhere.
> I've had the exhaust checked over several times, no problem.
> The reason I've been given is a vibration at low revs that
> sets up a resonance between the exhaust and the suspension.
>
> So, is this the case, does anyone have a similar tale or is
> this all spin and no substance?
The vibration is more likely to be an interaction between exhaust
and bodywork.
Is this a new problem or has it appeared after a period of time?
What type of exhaust is fitted? Original, OEM replacement, or aftermarket/pattern.
If it's aftermarket, then it may not have been tested as throughly as
an original part, and may result in unwanted resonance.
It's worth bearing in mind that in many cases the exhaust is designed
for a specific body shape - that exhaust for an '88 whatever may turn
the '89 remodeled car into a rattle box!
/John
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Cheers John,
Original Honda twin exhaust - was a bit leery of the Engineer's explaination, good to know that it's not bovine excrement :)
Problem less now that he has tightened the clips, ah well ....
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Dan,
I know you have sorted this now and the exhaust was the original......
Many exhausts end being fitted in short sections, often pattern parts and with the fitter having somedifficulty getting the inserted part to line up. For this reason many systems are left under stress not hanging equally on the rubbers.
A cure for resonance is to undo every clamp/joint and allow the whole system to settle into a natural evenly hanging position. Tighten up again and it could be loads better.
Easier said than done on an old system with seized joints though.
David
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