Engine breaking sound
 

What is the very audible (from cabin at least) and distinct rubbing sound that you hear while engine breaking? What part is rubbing against what part to slow the car down?

I always wonder if people can hear this rubbing from outside the car. It's pretty loud. Sounds like me dragging my mouse around on my wooden desk.

Braking

Cylinders and piston rings. And air passages. Unless it really did break.

Old video, but these are the components you're probably hearing, as well as a combination of transmission sounds..

Going off of your "rubbing" description

[ame="https://www.youtube.com/watch?v=pJj8NvDUSFs"]Clutches - Explained - YouTube[/ame]

H...hmm.... Getting the feeling you guys don't experience this sound...

Starting to feel like something is terribly wrong.

Yep. Have just confirmed via youtube there should not be a sound. Hm...

If it sounds like a diesel compression release braking ...... I'm ah feared there is something wrong with your car.......:iono:

If it sounds like just an uaaaaaaaa..... then I figure it's just normal compression/decompression sound.

;)


humfrz

Why would you engine brake?
It's not a truck.
Use your brakes. Cheaper, faster to replace than a clutch, and engine stress/gear box problems that you may ....uh.... wait....never mind.

we can't trust OP's judgement, he never figured out where the smell came from.

I'm betting the OP is being paranoid again. This car makes sounds for days, unless the car actually mechanically functions poorly then there probably isn't anything wrong..

...there is nothing wrong with engine braking unless you're one of those folks that claim driving up to the redline is "bad" for a car too.

No part is "rubbing" against another part to slow the car. At least no parts that are not rubbing against each other when you accelerate. When you engine brake the compression from the engine is what is slowing you down. The engine cuts fuel so the cylinders are no longer firing and creating power or torque. The existing torque in the wheels and drivetrain is used up by turning the engine against the compression. There is a minimal speed reduction just due to the mechanical resistance of the drive train but the compression is doing the bulk of the work. This is why the exhaust note changes dramatically when engine braking since there is no firing occurring and no actual exhaust being generated. You will hear things that you normally don't simply because they are no the louder sounds to cover them up. It doesn't help that these cars have the tranny sitting almost in your lap and it is covered by the soundproofing equivalent of tinfoil and Kleenex. There is nothing wrong with the car.


Oh and as pointed out it is very important to understand the difference between "breaking" and "braking" since they are not the same thing!

Unless he doesn't rev match and is slipping the clutch like a brake pad.

...wut

This is giving me flashbacks to ludwig double clutching up-shifts

Truck master race.

Tranny's ride in the trunk, sorry.