if you mean just the dipstick and tube then yeah you can do it anytime you want without draining, if you want to clean or replace the oil pickup then you need to drain the oil to drop the sump off the car, then remove the pickup, clean all the sump joining surfaces and on the block and reseal it with rtv, most people do it on these cars a preventative measure because of the dipstick, pcv and sludge blocking the pickup, i did it because of the tensioner rattle and thinking it wasnt building oil pressure quick enough , time will tell on that, takes 24hrs for sealant to dry before i can put oil in and start it up.
Reading my post back, yeah, I definitely wasn't clear there! It was definitely the dipstick I was asking about and not the sump. I have a feeling there's an oil leak coming from somewhere round there anyway, so will be good to check it's all healthy. I'll order a new dipstick holder and will save the sump and pickup for the next service when it's warmer.
MoT tomorrow. All the jobs I was planning on doing, I haven't done, so spring seats on the rear beam still need doing, along with all the rest. Would rather get it through the test though than spend money on things and then find I've got something that's not worth spending the money and time fixing. Really not in the mood for repairs and a re-test right now...
Sent from my iPhone using Tapatalk