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Old 02-05-2020, 02:32 PM   #14
maytag
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Join Date: Mar 2018
Location: Utah
Posts: 2,446
Quote:
Originally Posted by BrantyB View Post
To fit the 4" pulley you'll have to shave off part of the TDC (top dead centre) boss which is a hollow alloy protrusion cast into the crankcase. It is used to fit a TDC rod when locking the camshafts as part of the IMS replacement procedure.

That is my understanding.
aaah, yes, this is true. Thanks for helping me connect the dots, hehe.

However, at least in my case, enough remains of the 'boss to still use the pin. Regardless; there are other means of finding TDC, and locking the crank, if IMS replacement is desired. But a "fancy-pants" shop may not be willing to work outside-the-box like that. So consideration might be appropriate.
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