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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / December 20071993 Mercury Marquis TPS
I have a 1993 Mercury Marquis that needs a TPS. The steel screw seems to be tight into the aluminum body. Seems like a quarter inch hex head would have been preferable. Are there any tricks in getting the screw out without ruining the phillips head? Thanks Don > I have a 1993 Mercury Marquis that needs a TPS. The steel screw seems > to be tight into the aluminum body. Seems like a quarter inch hex > head would have been preferable. Are there any tricks in getting the > screw out without ruining the phillips head? Ford had a habit of using Pozidrive screws for the TPS on some years. They look similar to Phillips, but they aren't. Phillips screws have somewhat curved and tapered slots that match the curved cut of the driver, while Pozidrive uses straighter slots and drivers. If you use the wrong driver in the wrong screw you can damage them both. Here's a good-sized pic from some UK site that shows the straight cut of the Pozidrive bits, and the curved sides of the Phillips... http://www.harbeth.co.uk/sales/servicingandspares/images/Harbeth-screwdriver-O.jpg > > I have a 1993 Mercury Marquis that needs a TPS. The steel screw seems > > to be tight into the aluminum body. Seems like a quarter inch hex [quoted text clipped - 9 lines] > Here's a good-sized pic from some UK site that shows the straight cut of the > Pozidrive bits, and the curved sides of the Phillips...http://www.harbeth.co.uk/sales/servicingandspares/images/Harbeth-scre... I found a tight fitting screwdriver and the screws are very tight or they are bound in the holes. I was even able to get vise grips to attach to the perimeter of the screw and I still could not turn them. Is it possible being in there for so many years, the steel screws sealed inside the aluminum housing? Would it be helpful if it was heated with a pencil torch? Thanks Don |
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