Jakoketjujen venyminen/kuluminen
Lähetetty: 09.10.2020 21:26
Tuo vaiva on monessa nykymoottorissa.
PSA:n kohdalla ehkä pahimpana BMW:n THP/VTI moottoreissa,joka saattaa johtaa isoon moottorivaurioonkin.
En ole koskaan ajatellut syy-yhteyttä moottorin suoraruiskutukseen,mutta luettuani Rockauton lokakuun uutiskirjeen löytyi mahdollinen syy ongelmaan.
Tässä lainaus: This year brought us a new specification for motor oil; ILSAC GF-6 / API SP. One of the primary goals of the new oil spec is to reduce incidence of two problems gasoline direct injection (GDI) engines have been experiencing.
GDI blasts the fuel directly into the combustion chamber at high pressure. This leaves less time for the air and fuel to mix together. The resulting air/fuel mixture may burn unevenly which may generate a lot of soot. As the pistons move up and down, the soot gets mixed into the motor oil. The soot travels with the motor oil through the engine and causes wear.
The most noticeable wear often occurs between the pins and bushings that hold timing chains together. As the bushing holes wear and enlarge, the timing chains stretch. Eventually the timing chains may stretch to the point that they slip across gear teeth or otherwise are unable to correctly connect the crankshaft to the camshafts. The computer generates a trouble code, the engine goes into limp-in mode and/or the engine stops running. GF-6 / SP oil resists collecting and circulating the harmful soot.
GDI on siis lyhenne "Gasoline direct injection.Tuossa voi hyvin olla perää,että moottoriin muodostuva noki tuhoaa ketjun?
PSA:n kohdalla ehkä pahimpana BMW:n THP/VTI moottoreissa,joka saattaa johtaa isoon moottorivaurioonkin.
En ole koskaan ajatellut syy-yhteyttä moottorin suoraruiskutukseen,mutta luettuani Rockauton lokakuun uutiskirjeen löytyi mahdollinen syy ongelmaan.
Tässä lainaus: This year brought us a new specification for motor oil; ILSAC GF-6 / API SP. One of the primary goals of the new oil spec is to reduce incidence of two problems gasoline direct injection (GDI) engines have been experiencing.
GDI blasts the fuel directly into the combustion chamber at high pressure. This leaves less time for the air and fuel to mix together. The resulting air/fuel mixture may burn unevenly which may generate a lot of soot. As the pistons move up and down, the soot gets mixed into the motor oil. The soot travels with the motor oil through the engine and causes wear.
The most noticeable wear often occurs between the pins and bushings that hold timing chains together. As the bushing holes wear and enlarge, the timing chains stretch. Eventually the timing chains may stretch to the point that they slip across gear teeth or otherwise are unable to correctly connect the crankshaft to the camshafts. The computer generates a trouble code, the engine goes into limp-in mode and/or the engine stops running. GF-6 / SP oil resists collecting and circulating the harmful soot.
GDI on siis lyhenne "Gasoline direct injection.Tuossa voi hyvin olla perää,että moottoriin muodostuva noki tuhoaa ketjun?