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by OBSteve
Thu May 11, 2023 5:09 pm
Forum: Ignition - Mechanical | Electronic
Topic: Lost a tappet
Replies: 9
Views: 3113

Re: Lost a tappet

Thanks for the reply's. That's my working theory: that the locking nut vibrated off and disappeared into the bowels of the engine and the tappet slowly unscrewed, pressed against the inside of the cap and banged a hole and slowly tapped a threaded hole during its escape.
by OBSteve
Tue May 09, 2023 3:11 pm
Forum: Ignition - Mechanical | Electronic
Topic: Lost a tappet
Replies: 9
Views: 3113

Re: Lost a tappet

Not my finest work: https://live.staticflickr.com/65535/52884577726_796490544b_c.jpg By the way it took me 30 min to figure out how to post this picture (and I work in IT). I created an account on flickr, tried all the default image sharing options (none worked), then searched the web for 15 min bef...
by OBSteve
Fri May 05, 2023 10:32 am
Forum: Ignition - Mechanical | Electronic
Topic: Lost a tappet
Replies: 9
Views: 3113

Re: Lost a tappet

Thanks for the reply. I did just as you mentioned and, luckily, did not find any debris in the oil or slinger. It'll be a mystery as to where the tappet made its way to until engine disassembly but I'm intrigued by the hole in the valve cover that looks as if it were drilled and tapped. I wonder if ...
by OBSteve
Thu May 04, 2023 12:51 pm
Forum: Ignition - Mechanical | Electronic
Topic: Lost a tappet
Replies: 9
Views: 3113

Lost a tappet

Recently I've noticed a decrease in power - 50% to be precise. Investigation showed that my left cylinder intake tappet retaining screw came loose and allowed the tappet screw to unscrew and begin hitting the aluminum access port util it punched a hole through it and subsequently disappeared. Withou...




 

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