Rudders1 Posted July 24, 2023 Report Share Posted July 24, 2023 Hi all, A technical question, I'm just about to change the oil seal in the timing gear cover 1296cc engine and have noticed that some of the bolts have screw heads 🤔 is this correct and why are some bolts and some are screws. Never seen this before. Thanks David Link to comment Share on other sites More sharing options...
JohnD Posted July 24, 2023 Report Share Posted July 24, 2023 Quite right, Rudders! But there's even more to it than that! As the diagram shows there are nuts on studs, bolts into threaded holes, screws and one short screw! This arrangement is common to both four and six cylinder Triumphs.  The screws, with the exception of the short one, are into the front engine plate; the stud with nut is there to help location on installation.  I presume that Triumph wanted all to be fitted from the front for ease in production, so the screws were to limit the torque that the hairy-chested assembly line workers could apply to the very short threads in the engine plate.  Else they would have used nuts and bolts. John 1 Link to comment Share on other sites More sharing options...
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