Re-read my previous email. Thanks, Tom Hargrave www.kegkits.com 256-656-1924
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of dave walton Sent: Sunday, August 12, 2007 11:46 AM To: Mercedes Discussion List Subject: Re: [MBZ] thoughts on diesel clatter This is turning into a dead horse, but what the hell... Wouldn't a bad spray pattern delay the ignition of the fuel? My assumption has been that the clatter is due to early ignition. Thanks -Dave Walton On 8/12/07, Tom Hargrave <[EMAIL PROTECTED]> wrote: > All of the flow in the return line is due to fuel that leaks past the > injector body & it's a very small leak. The leak is intentional & is > designed to lubricate the injector. > > You are correct that the pressure setting affects the way the engine runs > but the pressure setting affect the spray pattern. Higher pressure = faster > spray from the injector nozzle = better atomization of the fuel. > > Thanks, > Tom Hargrave > www.kegkits.com > 256-656-1924 > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of dave walton > Sent: Sunday, August 12, 2007 11:15 AM > To: Mercedes Discussion List > Subject: Re: [MBZ] thoughts on diesel clatter > > All the flow through the return line is the result of pressure drop > AFTER the injector fires, right? > My direct observation has been that the same injectors set to > different release pressures affect the amount of clatter. I have been > assuming that is due to the timing difference. > Am I wrong? > > -Dave Walton > > On 8/12/07, Tom Hargrave <[EMAIL PROTECTED]> wrote: > > You have forgotten some important points. > > > > I don't know how fast your arm is but the down stroke on my pressure > tester > > is probably 100 times slower than the delivery stroke on at diesel IP at > > idle & the delivery stroke speed only gets faster as the engine RPMs > > increase. Plus on a tight system, the injector line is already at the > > pop-off pressure from the last cycle. This means that delivery starts the > > moment the IP piston port closes regardless of spring tension. You have to > > re-build pressure with every stroke of your tester. > > > > Thanks, > > Tom Hargrave > > www.kegkits.com > > 256-656-1924 > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On Behalf Of dave walton > > Sent: Sunday, August 12, 2007 10:32 AM > > To: Mercedes Discussion List > > Subject: Re: [MBZ] thoughts on diesel clatter > > > > The more pressure exerted by the spring in the injector, the more fuel > > pressure it takes for the injector to fire. It takes more Time to > > develop higher pressure. Time = Timing. > > > > Hook an injector up to a pressure tester, change the shims and see for > > yourself. > > Am I missing something? > > > > -Dave Walton > > > > On 8/12/07, Tom Hargrave <[EMAIL PROTECTED]> wrote: > > > Timing is 100% controlled by the IP & the injector is just a poppet > valve. > > > > > > Weak spring pressure affects the spray pattern, not the injection timing > & > > > this causes the clatter. > > > > > > Another failure is a leaking injector which can leak fuel into the > > > pre-chamber during the intake stroke & cause nailing. > > > > > > Thanks, > > > Tom Hargrave > > > www.kegkits.com > > > 256-656-1924 > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > > > On Behalf Of dave walton > > > Sent: Sunday, August 12, 2007 4:27 AM > > > To: [EMAIL PROTECTED]; Mercedes Discussion List > > > Subject: Re: [MBZ] thoughts on diesel clatter > > > > > > My experience has been that diesel clatter is caused by weakening of > > > the spring in the injector. That causes it to fire at a lower > > > pressure. Eventually it injects the fuel so prematurely that it > > > ignites while the piston is still on the upstroke. > > > > > > -Dave Walton > > > > > > On 8/11/07, John M McIntosh <[EMAIL PROTECTED]> wrote: > > > > Well since my 500SEL is busy having a rebuilt transmission installed > > > > I was forced to cart four people across the rockies up the Coquihalla > > > > Highway 5 to 8% grade for nearly 3000 feet of altitude in the 92 > > > > wagon. For reference the OM603 will only do 75 mph flat out up the > > > > 8% grade, water temp rose from 85C to 100C. That and another 500 > > > > miles of mountain driving and 250 miles of flat land. > > > > > > > > After all this my wife noticed the clatter is *much* louder at idle, > > > > much more clatter/bearings bouncing/burbling kinda noise. > > > > > > > > I wondering if I knocked loose lots of carbon (mind our normal > > > > driving over the last 40K miles has been highway), and it's causing > all > > > > this racket? Well that or blew a exhaust gasket (don't think so) or > > > > muffler joint. > > > > > > > > PS Saturday night in a unnamed rednecked city, never seen so many > > > > chipped dodge ram 3500s. When they stomp the throttle at the > > > > intersections, billowing clouds of black diesel smoke, same on the > > > > highway, mind at 80 mph it's lots of roar and smoke, not much > > > > acceleration, no need to check blind spots you sure can hear them. > > > > > > > > John > > > > 1983 300TDt 385k Kilometers (mobil 1 Delvac) > > > > 1990's 300TDt 202k Kilometers (mobil 1 Delvac) > > > > 1993 500SEL 194k Kilometers (mobil 1 Delvac) > > > > > > > > > > > > > > > > _______________________________________ > > > > http://www.okiebenz.com > > > > For new parts see official list sponsor: http://www.buymbparts.com/ > > > > For used parts email [EMAIL PROTECTED] > > > > > > > > To Unsubscribe or change delivery options go to: > > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > _______________________________________ > > > http://www.okiebenz.com > > > For new parts see official list sponsor: http://www.buymbparts.com/ > > > For used parts email [EMAIL PROTECTED] > > > > > > To Unsubscribe or change delivery options go to: > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > _______________________________________ > > > http://www.okiebenz.com > > > For new parts see official list sponsor: http://www.buymbparts.com/ > > > For used parts email [EMAIL PROTECTED] > > > > > > To Unsubscribe or change delivery options go to: > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new parts see official list sponsor: http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new parts see official list sponsor: http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
