Kaleb is on to something. As I stated earlier, it did get very low on oil (4 quarts). I guess the next thing to do is pull the oil pump pan and hope to see # 1 and 2 rods. I figured a basic rebuild (valves/guides, timing gears and chain, main and rod bearings, piston rings, gaskets and neccessary prechamber/injector resealing) runs ~ $ 800 in parts. If there is a bad piston or rod, that is costly. What is a lively, low milage (<150k) OM 617.95x worth? Kaleb, do you have one?
On 3/14/07, Kaleb C. Striplin <[EMAIL PROTECTED]> wrote:
What happened is that it got a little low on oil and nicked the #1 crank bearing etc. When they are run low but not too low to flat out lock it up it always nicks #1 and you get a bad knock, or rather, mild to really bad depending on how low it went. Hans Neureiter wrote: > Today I went to do some more investigating: > Excessive blow-by is not evident. The turbo is slightly oily, but the > shaft is moving a little in radial direction. > The motor started right up. A huge, scary clunk at first that turned > into a steady, loud hammering. Oil pressure first pegged and went to > 2.5 bar at a steady 800 RPM idle. > When operating temp reached 85 C (after ~ 5 min.) pressure dropped to > slightly above 1 with a few short excursions to below 1 bar. > Loosening the injector lines resulted in a noticeable reduction of > knock intensity but was equal for each cylinder. > Using a stethoscope, the highest intensity of the knock is apparent > near the front crank seal and at the Vac.pump housing. > Lots of blue smoke at first that never really cleared. > Motor ran for at least 20 minutes until turned off. > Questions: > Can injectors/prechambers be ruled out as major cause? > Does oil pressure behavior indicate crank bearing failure? > Does most noise coming from front crank seal indicate balancer failure? > Do I have a conglomeration of failing parts (Turbo seal = blue smoke, etc.) > My conclusion so far: 90% bottom end problem. But what? > -- Kaleb C. Striplin/Claremore, OK (2x) 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL, 87 300SDL, 85 380SE 5.0 Euro, 84 190D 2.2, 81 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.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
-- Hans Neureiter, Houston, TX '82 300SD, '95 E300D
