On Sunday, 4 September 2016 00:24:48 UTC+1, Dave Plowman (News) wrote:
In article ,
tabbypurr wrote:

Lots of cash is spent on pointless junk on cars. Modern cars are all
about a certain image of impression that to me means absolutely nothing.
A sense of disconnection with the road, naff pretentions of style etc
etc. Anyway, a rubber band is cheaper than a steel fixing plus slower
assembly.

Don't be silly.

I see

Even the very most expensive cars use insulating
suspension for the exhaust system.

and?

You may not have noticed, but engines ain't bolted down either.

They're mounted on rubber mouldings a bit like doughnuts. Prewar vehicles that have engines bolted to the chassis are much noisier as a result, the car body acts as a sounding board.

The
exhaust is rigidly connected to the engine.

Usually yes. I had one that had a ball joint in the exhaust near the engine.

If you bolt one down without
the other something would have to give...

I think you'll find we had rigidly mounted exhausts and rubbber mounted engines for decades. The exhaust system flexes. Modern rubber hung exhausts also flex, they don't follow every movement of the engine rigidly.


NT