Hi, the Ford tool is 310-042 which fits on the shraeder valve and then you use there bleed equipment to pull the fuel through till there are no bubbles. Google Ford 310-042 to see what the tool looks like. Sorry for the delay in reply
We have seen this issue a few times on a Crafter. Remove the crankshaft pulley for the cambelt and check the key way. We have seen a couple of pulleys cracked/damaged also causing the crankshaft to be worn