wrist pin clip issues

Todd Gross · 05-04-2017, 10:33 AM

I had one customers' engine that I tore down for a freshen up only to find multiple spiro loc failures. To the point of serious cylinder wall and piston damage. After digging for info I found out the previous assembler purchased his spiro locs in bulk from McMaster Carr. Needless to say the quality control ( heat treat ) may not be up to the quality of that of a Performance Piston company. I installed JE locks and 2 seasons later on freshen up, no more failures on a 700" .
I am not suggesting that that toolmakeron's engine has McMaster stuff in it, just sharing an experience*

05-04-2017, 10:33 AM	#10
Todd Gross Member Join Date: Mar 2016 Location: Crete, IL Posts: 167 Likes: 260 Liked 54 Times in 24 Posts	Re: wrist pin clip issues I had one customers' engine that I tore down for a freshen up only to find multiple spiro loc failures. To the point of serious cylinder wall and piston damage. After digging for info I found out the previous assembler purchased his spiro locs in bulk from McMaster Carr. Needless to say the quality control ( heat treat ) may not be up to the quality of that of a Performance Piston company. I installed JE locks and 2 seasons later on freshen up, no more failures on a 700" . I am not suggesting that that toolmakeron's engine has McMaster stuff in it, just sharing an experience* __________________ Todd Gross 3323 FS/E,F