Nah, bout 4hrs for me to do the 2.2. From putting the car in the garage to taking it back out. Bearing in mind I've never done one so don't know how things come apart (ie electrical connectors etc.
Also included lunch and a brew .
So um yeah, maybe 2.5hrs actual work.
knowing what and how to dismantle stuff is certainly the key to getting a job done efficiently. I had about 90 minutes in doing my V6 cambelt, although there was a lot of extra time in changing the crank oil seal while I was there. The water pump isn't part of that job, but is only another 3 bolts, so with the necessary cleaning up is another 5 minutes. The V6 thermostat is probably another 90minute job, but some of the cambelt preparatory dismantling is the same. The advice here is to replace the transfer tube, which saves a worthwhile amount of time if you chisel the tube and housing apart from the beginning.
The brew is an essential part of working on lumps of cold metal this time of year