20.12.2024, 18:15
Weiß man eigetlich was die Ursache ist, wenn die AFM Lifter defekt gehen ?
GM hat vor einiger Zeit die Ölfilterspezifikation insofern geändert, dass das Bypass-Ventil erst bei ca. 50% höherem Druck öffnet.
Als Grund geben Sie an, dass ansonsten Partikel in den Ölkreislauf kommen können und Schäden hervorrufen können. Ob hier ein Zusammenhang zu den möglichen AFM-Problemen besteht ?
"Today's engine has very tight tolerances, two stage oil pumps and high flow lubrication
system requirements. The proper match of oil filter to engine application is more
important than it has ever been in the past. The use of a replacement oil filter with an
internal bypass valve opening pressure specifications of 15 PSI (100 kPa) or less, allows
debris to circulate in the engine causing damage to bearings and other tight tolerances
areas, which may result in premature engine failure.
The oil pressure was increased to accommodate these tighter tolerances. As a result, the
oil filter specifications of the production oil filter and the service oil filter were also
improved to meet the new engine requirements.
Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of
pump out pressure. This means that the oil pump now does not begin to regulate until
pressure is built up to the main gallery. This change reduces the amount of time it takes to
provide oil to the engine bearing and lifters during extreme cold start conditions.
Main gallery feedback oil pump control systems are present on the following engine
families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE),
High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with
the main gallery feedback oil pump control systems are factory built with ACDelco® oil
filters.
Important: The PF64 and PF63, which is commonly confused by many in the
automobile service industry as an ACDelco® PF48 and/or PF48E, because both oil filters
have a similar appearance and are very close in oil can size. However, these oil filters are
not the same size and also have different internal bypass valve opening pressure
specifications (PF48/PF48E = 15 PSI (100 kPa), PF64/PF63 = 22 PSI (150 kPa).
Note: Any aftermarket filter must also have an internal bypass valve opening pressure
specification, element integrity, filtration performance, media particle trap specification
and burst strength that is equivalent to the ACDelco PF64/PF63 filters. "
GM hat vor einiger Zeit die Ölfilterspezifikation insofern geändert, dass das Bypass-Ventil erst bei ca. 50% höherem Druck öffnet.
Als Grund geben Sie an, dass ansonsten Partikel in den Ölkreislauf kommen können und Schäden hervorrufen können. Ob hier ein Zusammenhang zu den möglichen AFM-Problemen besteht ?
"Today's engine has very tight tolerances, two stage oil pumps and high flow lubrication
system requirements. The proper match of oil filter to engine application is more
important than it has ever been in the past. The use of a replacement oil filter with an
internal bypass valve opening pressure specifications of 15 PSI (100 kPa) or less, allows
debris to circulate in the engine causing damage to bearings and other tight tolerances
areas, which may result in premature engine failure.
The oil pressure was increased to accommodate these tighter tolerances. As a result, the
oil filter specifications of the production oil filter and the service oil filter were also
improved to meet the new engine requirements.
Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of
pump out pressure. This means that the oil pump now does not begin to regulate until
pressure is built up to the main gallery. This change reduces the amount of time it takes to
provide oil to the engine bearing and lifters during extreme cold start conditions.
Main gallery feedback oil pump control systems are present on the following engine
families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE),
High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with
the main gallery feedback oil pump control systems are factory built with ACDelco® oil
filters.
Important: The PF64 and PF63, which is commonly confused by many in the
automobile service industry as an ACDelco® PF48 and/or PF48E, because both oil filters
have a similar appearance and are very close in oil can size. However, these oil filters are
not the same size and also have different internal bypass valve opening pressure
specifications (PF48/PF48E = 15 PSI (100 kPa), PF64/PF63 = 22 PSI (150 kPa).
Note: Any aftermarket filter must also have an internal bypass valve opening pressure
specification, element integrity, filtration performance, media particle trap specification
and burst strength that is equivalent to the ACDelco PF64/PF63 filters. "
Gruß
Götz
Götz
