What are these "retarders" and how do

Sounds like somebody wasn't "thinking" and it also makes me wonder who is in charge. Sometimes people are giving orders that have never done the job themselves. Thanks for this post Smithton, excellent info!!! Denise

 

Very close Jack. Actually the intake and exhaust valves close simultaneously, duplicating the compression stroke on all cylinders.
Of course the exhaust valves must be cracked open ever so slightly to prevent blowing a head gasket, thus the noise, which is not actually engine exhaust per se, but merely compressed air escaping.

 

I think this same thing happens in humans Sorry guys, please forgive me. It was just too tempting for me

 

Actually, there is an emotional/physical parallel there.
Sounds mechanically Freudian, but I see where you're going.

 

Yes, I see what you are saying Ok, I lied. It's so rare I don't have anything to say but you've left me speechless

 

That was not my intent, I was merely trying to bolster your theory, thereby making it look like we are both smart.
Be advised I have no psychiactric training, but I've been watching "House".

 

LOL!! And how I love House

 

My engine is really quiet with that soot filter on so I don't worry about it so much.

 

Oh yeah, hows that working out? Don't have one yet, but had to watch a training video.
Have you had to do that regeneration thing?

 

my 07 freight shaker you can't even hear when I use the jakes (on high or low). I know when I hit major cities if i know that traffic is going to be touch and go I can reach that switch really quickly to get some extra braking power. I try to be aware of circumstances so I don't need it, but then you boys and girls know better than me how unpredictable those lil 4 wheelers can be.