I'm rebuilding a 40 ULH. When I extracted the lifter blocks to replace the worn tappet rollers I checked the ID of the tappet guide and OD of the tappet. The clearance of all four is ~0.0027'' The book says 0.0005 '' to 0.001'' that seems awful tight.
The clearance on a Shovel is 0.001'' - 0.002'' and the wear limit is 0.003'' I wonder if the clearances were over stringent back in 1940 as there is more lifter travel in a Shovel let alone a hot rod Shovel vs an old Flathead. The reason I ask is that I am having a tough time finding a set of tappets and may have to run these.
Thanks
Pete::::::::::;;;;;;
The clearance on a Shovel is 0.001'' - 0.002'' and the wear limit is 0.003'' I wonder if the clearances were over stringent back in 1940 as there is more lifter travel in a Shovel let alone a hot rod Shovel vs an old Flathead. The reason I ask is that I am having a tough time finding a set of tappets and may have to run these.
Thanks
Pete::::::::::;;;;;;
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