Re: Fuel gage problem. on Series 23

Posted by HH56 On 2016/12/28 11:56:00

I believe the trunk floor of the 50 is similar in construction to the 47. If so there will be a small bulged up area about 2" in diameter on the floor above the sender. If your car has that bulge I expect the sender will be almost directly under it.

The bulge is to give extra clearance for the wire terminal. On the 47 the terminal is toward one side of the sender so the actual sender is located about 3/4 inch to the rear of the center of the bulge. On yours with the more centered terminal I expect the sender will be almost directly under the highest part of the bulge. You might have your mechanic check that location for starters and then adjust the hole to the front or rear to match the actual sender body.

I cut the opening with a 3 1/2" hole saw. Used a flanging tool to make a slight depression around the circumference of the hole so the cover would fit flush with the floor. Then cut a plate out of 16ga sheetmetal to fit the flanged circle. Cutting the circle with a 4 3/8 hole saw gave me the proper size for my flange but that would vary depending on what was done to the hole. Because the bulge is no longer present, any heavy weight in the trunk could depress the floor enough to touch the terminal. To help prevent that I used the hole left by the center drill in the hole saw and added a rubber bumper to the plate. The bumper will come to rest on the sender before the floor and plate could move to touch the terminal. Glued a layer of sheet rubber on the plate as extra insurance and also act as a gasket to the floor.

My hole wound up at the very end of one of the small channels in the trunk floor. That left an opening the cover wouldn't close so I bent the floor metal up so end was flush with the flanged portion of floor. That let the cover close the opening completely.