diesil knock

[nick nick]

What exactly is diesil knock I assume its to do
with Wear but why does it have to be so noisy
petrol engines wear but dont make the same clatter
its one of those things ive always wanted to know
but never got around to asking

[Dave Goody]

Originally Posted by nick nick

What exactly is diesil knock I assume its to do
with Ware but why does it have to be so noisy
petrol engines ware but dont make the same clatter
its one of those things ive always wanted to know
but never got around to asking

No it's nothing to do with Ware, I used to get it in Chelmsford with my CDT

[BigRuss]

Originally Posted by nick nick

What exactly is diesil knock I assume its to do
with Ware but why does it have to be so noisy
petrol engines ware but dont make the same clatter
its one of those things ive always wanted to know
but never got around to asking

Nothing to do with wear whatsoever, it's all to do with the pressures involved in the combustion cycle of a diesel engine.

The fuel on a diesel is injected into the cylinder as the piston is approaching TDC and before maximum compression has been reached. Therefore the burning charge is creating pressure and also being compressed at the same time hence the characteristic diesel knock. It can be a lot worse in colder conditions.

These days common rail diesel engines don't do this much due to the fact that the fuel is injected in stages which improves the combustion of the diesel and produces more power, torque and also lessens noise.
The advances in fuel technology have played a part in making modern diesel engines quieter too.

Normally the diesel engines on the 75/ZT are pretty quiet with next to no real "Knock" but on a tuned engine (with a Synergy fitted) you may get a bit of diesel knock especially in colder weather with the engine cold, but can be minimised by using good quality fuel instead of Supermarket fuels or by turning the synergy down a bit.

Russ

[nick nick]

Originally Posted by bigruss42

Nothing to do with wear whatsoever, it's all to do with the pressures involved in the combustion cycle of a diesel engine.

The fuel on a diesel is injected into the cylinder as the piston is approaching TDC and before maximum compression has been reached. Therefore the burning charge is creating pressure and also being compressed at the same time hence the characteristic diesel knock. It can be a lot worse in colder conditions.

These days common rail diesel engines don't do this much due to the fact that the fuel is injected in stages which improves the combustion of the diesel and produces more power, torque and also lessens noise.
The advances in fuel technology have played a part in making modern diesel engines quieter too.

Normally the diesel engines on the 75/ZT are pretty quiet with next to no real "Knock" but on a tuned engine (with a Synergy fitted) you may get a bit of diesel knock especially in colder weather with the engine cold, but can be minimised by using good quality fuel instead of Supermarket fuels or by turning the synergy down a bit.

Russ

Cheers russ
Makes perfect sense

[tourerfogey]

Perhaps you should change your screen name from 'nick nick' to 'nock nock'

[nick nick]

Originally Posted by tourerfogey

Perhaps you should change your screen name from 'nick nick' to 'nock nock'

Never thought of that. Duuuuur

[stocktake]

Originally Posted by tourerfogey

'nock nock'

Who's there?

[tourerfogey]

Originally Posted by stocktake

Who's there?

Well, that'll be nick nick in his tractor, oops sorry 75 diesel.

[tigerchubs]

John get some millers down it's neck cleans the injectors a treat and protects the fuel pumps

http://www.millersoils.net/1_Millers...ETAIL-dps4.htm

[baxlin]

Originally Posted by tigerchubs

John get some millers down it's neck cleans the injectors a treat and protects the fuel pumps

http://www.millersoils.net/1_Millers...ETAIL-dps4.htm