Citata:
Pradžioje rašė alteroja
om651 (4 cilindrų) 2 turbos, grandinės mechanizmas gale. ėjo nuo ~2009-2017 iš esmės pakeistas kitu, gal dar kur užsilikęs kokiam modelyje.
om642 (6 clindrų), viena turba, grandinės mechanizmas priekyje. ėjo nuo ~2005 iki 2017 pakeistas kitu, gal dar kur užsilikęs, bet labai abejoju.
abu neturi išrišimo dyzelių ligoms, aišku pastovūs 651 kasiakai su purkštukais ir grandinėmis šį bei tą pasako.
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joo, kiek suprantu om642 vienareiksmiskai patikimesnis, nes neturejo bedu kaip om651 su tais delphi purkstukais (kuriuos paskui keite magnetiniais selenoidiniais), kiek randu internete tai lyg ir su grandinem ir itempejais nebuvo problemu, ir turbina viena, o ne dvi ir priejimas prie grandines reikalui esant is priekio, ir variklio darbas 6cilindru, maziau drebulio ir pan.
Radau tik sias problemas su om642:
-Pre-2010 OM642 engines were susceptible to oil cooler leaks due to heat-related seal degradation. In 2010, Mercedes-Benz introduced more durable Viton seals which could be identified by their purple colour (the previously used seals were orange).
-The TWC temperature sensor (part no. A005 153 40 28) was susceptible to failure and was subsequently replaced with part no. A007 153 74 28. When the temperature sensor fails, the check engine light may illuminate and issue the OBD-2 diagnostic code P2031.
-The positive crankcase ventilation system vents to the inlet of the turbocharger. However, the vented air may contain too much oil to easily pass through the swirl motor valves which are downstream of the turbocharger. Once this oil and sludge begins to accumulate, the swirl motor valves may become inoperative and blow a fuse that controls other sensors which are required for the engine and emissions systems to operate properly. As a result, the vehicle will enter ‘limp home’ mode and limit engine speed to 3000 rpm.
Kaip ta paskutiniaja suprast? Kaip ji issprendziama?
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