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Ol' Ron · 01-03-2020, 08:32 AM

The worst part of the alum cover is the ware pattern on the cam thrust surface, causing a large cam backlash. One way to check this is with the aluminum ball trick. Attach on to the nose of the cam and rotate the engine. .008'010" is normal. I have found as much as .020 . The only way to fix this is a shim behind the cam timing gear. . WHY?? The excessive baclklash has an effect on timing

01-03-2020, 08:32 AM	#7
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: 8BA aluminum timing cover The worst part of the alum cover is the ware pattern on the cam thrust surface, causing a large cam backlash. One way to check this is with the aluminum ball trick. Attach on to the nose of the cam and rotate the engine. .008'010" is normal. I have found as much as .020 . The only way to fix this is a shim behind the cam timing gear. . WHY?? The excessive baclklash has an effect on timing