Hi Everyone,
I appreciate the thread is for Sigma engines but here's some useless info.....
The piccies show some plugs used by Ford and MMC. (None are similar to my setup, the restriction being the seating area on the shallow sump itself accomodating only a 20mm washer and bolt collar).
Top left has an integral washer, M12x1.75 part no 3051079, also used on some aftermarket shallow sumps.
Top right has a loose washer designed to fit, M12x1.75 part no 9L8Z-6730-A used on 3.7 Roadster
Bottom left has a loose washer designed to fit M14x1.75
Bottom right had a nylon washer M14x1.75
I believe the torque for those with rubber washers is 25lbft but will stand corrected. Bonded (dowty) require less.
Sorry, bit nerdy but as Rob said, good to know there are differences
Many Thanks Salmo Thats the best collection of sump plugs I've ever seen !!