Quote:
Originally Posted by JimBob0047
The internal piston is not interchangeable because the s54 has a different pressure which is why bmw doesn't sell it separately for the the S54.
|
This is not true. The s54 has the same nominal oil pressure as the M54 engine. They are both rated/regulated at 4 bar. This data is available in TIS.
BMW doesnt sell that piston for the s54 pump, but somehow in Germany tuners can get their hands on them and coat them with an anti wear surface. I wonder if its different from the m54 one. I've never seen anyone actually do that comparison.
Oil pressure is also set by the spring tension behind that piston.
Quote:
|
Would the vanos hub cost me a lot more labor while doing the rod bearings?
|
Ask your mechanic if you're not doing the job yourself.
Obviously every other job is more labour, but so is putting a car on a lift and getting things settled with a customer.