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
