SONNAX product - oversized pump bushing - ZF Factory recommends to change the oil pump 70 27 OP017 0024 instead
Installation of Oversized Precision Pump Bushing 85916-01 1. Remove and discard OEM bushing. 2. Machine pump housing bore ID to 1.9992" +/- .0005" (Ø50.780mm +/- 0.013mm). 3. The post-machining surface finish of the pump housing bore must be Ra60 - Ra125. 4. Install new Sonnax bushing. 5. Do not machine bushing ID of the 85916-01 version.