|
The lifters should be highly polished, not scuffed like yours. I would suggest that you change all the lifters. If these surfaces are not perfectly smooth, they will eat the cam lobes. What do the lobes look like? Is there any wear or pitting? If so, you will have to change the cams also.
When the lifters were dropped into the head, were they lubed with assembly lube? we use the lube to hold the lifters in, while we turn the head over, as well as the lube on the surface protects the lifter and cam from dry start up. When the motor was started, did you pull the DME, and crank it until you had oil pressure, before starting it? If these steps were not taken, the motor will have been started dry, and this could have damaged the lifters, as well the cams, not to mention shortening the life of the crank bearings.
Was this motor rebuilt due to a rod bearing failure, or a cam tensioner failure? If so, there may be tiny metal filings floating, which could have entered a lifter, causing it to collapse. This may also account for the scuffing of the lifters.
|