Hi, I recently had my cambelt and a couple of valves replaced. I recently checked the oil level and found that the mechanic had put in more than I would have done. On checking the water level in the header tank, I found it low. It usually does not leak. Do you think that when the mechanic did the head and cambelt job that a water loss was likely. I thought I'd ask before blaming the mechanic. My guess is that somewhere during the dismantling, water was lost, and he forgot to replace it. I added about 600 cc. Thanks A