Engine/Transmission (1998.5 - 2002) So how's it work?

[RussW1911]

OK, I buddy of mine went out and bought himself a 2001 HO Short bed. Pretty nice truck in my opinion... ...



He always asks questions about it and ofcourse I tell him he needs to get a membership with the TDR!



Last thing he asked me was... ... Why is the cummins so loud. Usually I am able to spout off this and that about the truck and quench his thirst, but this time I just said I will tell him monday. I wanted to get a good answer and be sure that I was right in what I told him.

Also I would like to know for my own "edumacatione" how it works ?



Could someone chime in and give a good reply as to how the cummins works and what is the cause of such loud knocky engine? I love the sound but it never really hit me that I can't explain exactly how it works and why it sounds the way it does.



Thanks for the help guys. Russ Wallis

 

[Sticks]

Massive high pressure elposion in the cylinders containd by fairly thick walls of steel transferring the noise down the con rods to the crank and out the bottom.



The VP44 is a bit of a party favor noise maker as well.



Laymans terms as I understand them. Someone will give a better answer this weekend I'm sure.

 

[BennyHL]

Diesel is a controlled knock. The flame front of combustion slapping against the piston creates most of the clacking you hear after it resonates throughout the engine.

 

[Joe Mc]

Tell him two things - 1, Real trucks make noise and 2, remove the silencer ring for a song. I noticed a caption on the back window of a truck recently "real trucks don't have spark plugs" - not bad, eh?

 

[CDWard]

A diesel engine uses a very high compression ratio to ignite the fuel. When the fuel is injected into the cylinder (which is under extreme pressure and high temperature)

the sudden explosion of the expanding flame slams into the piston and cylinder wall

creating that wonderful fuel knock we diesel owners love so much.

Check out issue 44 in the T. D. R. page 164 Exhaust Note, by Kevin Cameron. That is

a very informative article as are all of Kevins writings. And you are right,tell your bud to order the T. D. R right away,he will learn everything he needs to know.