Hey everyone,
I have a freshly rebuilt S54 which has been throwing P0012 since first start, despite many of the common fixes. The entire beisan catalog was done for the vanos - all new seals, sealing plate, drilled disc. I've also tried one of their rebuilt solenoid packs, and thoroughly ultrasonic cleaned an additional valve body - and the code remains. The engine was timed with the oem timing tool, and I've probably redone it almost a dozen times and am confident timing is good - the pin slides in both cams effortlessly with vanos pistons fully retracted against the caps and remains smooth after rolling the engine over by hand a few times.
There are effectively no symptoms of rough running or strange behavior during acceleration - just a consistent P0012 code which seems to stay on after prolonged idle/low rpm driving and otherwise stays in pending.
A buddy of mine was able to help data log vanos desired vs actual values - at low rpm/load when the inlet vanos was commanding full 60 degrees, it was only ever able to achieve around 52-55 degrees. Any commanded value under ~50 degrees was tracked perfectly by the inlet. The exhaust was spot on the entire time.
I am trying to get my hands on a windows laptop to access tool32 for a vanos test, and also set up a gauge to verify vanos oil pressure is good.
The folks at Beisan suggest trying an additional valve body - has anyone experienced this before or have any suggestions?
Thanks in advance!
I have a freshly rebuilt S54 which has been throwing P0012 since first start, despite many of the common fixes. The entire beisan catalog was done for the vanos - all new seals, sealing plate, drilled disc. I've also tried one of their rebuilt solenoid packs, and thoroughly ultrasonic cleaned an additional valve body - and the code remains. The engine was timed with the oem timing tool, and I've probably redone it almost a dozen times and am confident timing is good - the pin slides in both cams effortlessly with vanos pistons fully retracted against the caps and remains smooth after rolling the engine over by hand a few times.
There are effectively no symptoms of rough running or strange behavior during acceleration - just a consistent P0012 code which seems to stay on after prolonged idle/low rpm driving and otherwise stays in pending.
A buddy of mine was able to help data log vanos desired vs actual values - at low rpm/load when the inlet vanos was commanding full 60 degrees, it was only ever able to achieve around 52-55 degrees. Any commanded value under ~50 degrees was tracked perfectly by the inlet. The exhaust was spot on the entire time.
I am trying to get my hands on a windows laptop to access tool32 for a vanos test, and also set up a gauge to verify vanos oil pressure is good.
The folks at Beisan suggest trying an additional valve body - has anyone experienced this before or have any suggestions?
Thanks in advance!