TDI Engine: Understanding Brake Performance

Hello!

I have a G3 with an 81 kW (AFN) engine - my first diesel - and I've noticed that the engine braking effect is significantly weaker than it was in my previous gasoline cars.
I previously thought it was the opposite. There might be a defect, or it could be a normal technical reason (e.g., related to the turbo). I haven't checked the compression, but I haven't experienced any performance issues.

Greetings, Klausel.

Don't worry, the TDIs have a 'poor engine braking' characteristic, so everything is fine. Diesel engines don't have a throttle valve and don't create negative pressure during coasting.

Hi!

Alois wrote:

TDI engines have "poor engine braking"

.

Um, that's not entirely correct. TDIs have significantly longer gear ratios compared to gasoline engines, which is why the diesel's "supposedly" weaker engine braking effect. But don't worry, it's not a sign of an engine defect.

Best regards,
Uwe.

Hi!

Um, that's not entirely correct. TDIs have a significantly longer gear ratio compared to gasoline engines, which is why the diesel's 'supposedly' weaker engine braking effect. But don't panic, it's not a sign of an engine defect.


I can't really complain, this case rolls really easily, just like my old 'grandpa-style' case.

but a so-called 'stauklappen-bremse' (aka engine brake) doesn't sound bad at all in a truck... I wonder how that would sound on a TDI?

CU Gremlin.

Hi Gremlin,

Check out www.papmahl.de.
They offer a type of engine brake for the TDI.

Greetings,
Thomas.