Originally Posted By: Tony10s
Originally Posted By: Fordai
If the ADBV is up towards the engine then a cut ADBV doesn't really matter right? No oil will escape the filter UP into the engine because of gravity.
I don't know if this is true in every case. ZeeOSix has discussed this topic before and he might post a response to this before long, but I believe that the base of the filter being pointed up toward the engine doesn't necessarily mean that the oil will stay in the filter in every application. ZeeOSix can clarify this for us.
The whole discussion if an ADBV is needed or not in applications where the filter is mounted 'base up' (ie, many GM engines) has been brought up here a lot. The consensus is that even in that filter orientation an ADBV is needed.
The reason why is because any oil that resides above the level of the oil in the sump is going to try and drain down to the sump level due to gravity. Many filters mounted on the bottom of the engine with base up (like GMs) still have the filter above the sump oil level. If the oil pump gears are not 100% sealed, then oil above the sump level will eventually try to drain down to the sump level if there is nothing like an ADBV from stopping it.
Originally Posted By: Fordai
If the ADBV is up towards the engine then a cut ADBV doesn't really matter right? No oil will escape the filter UP into the engine because of gravity.
I don't know if this is true in every case. ZeeOSix has discussed this topic before and he might post a response to this before long, but I believe that the base of the filter being pointed up toward the engine doesn't necessarily mean that the oil will stay in the filter in every application. ZeeOSix can clarify this for us.
The whole discussion if an ADBV is needed or not in applications where the filter is mounted 'base up' (ie, many GM engines) has been brought up here a lot. The consensus is that even in that filter orientation an ADBV is needed.
The reason why is because any oil that resides above the level of the oil in the sump is going to try and drain down to the sump level due to gravity. Many filters mounted on the bottom of the engine with base up (like GMs) still have the filter above the sump oil level. If the oil pump gears are not 100% sealed, then oil above the sump level will eventually try to drain down to the sump level if there is nothing like an ADBV from stopping it.