For the spin on fuel filter for my 300SDL, the bolt passing through the upper housing has a hole sideways in it. Does this hole need to line up with the hole in the housing or is it not important? Also, the two O-rings...I know the larger ring goes at the top end of the bolt to seal from the top, but am i correct in thinking the smaller one goes down to the bottom of the hole in the housing plate? When i took the old one out there was only the top ring on so i am guessing about the smaller based on reading in a diesel forum that the smaller one seperates the filtered from non-filter fuel..or something like that. On-line parts diagrams just show both on the bolt but not if the smaller one goes to the bottom of the "well". TIA Shannon
- posted
15 years ago