On a Pontiac, the dowel pins really are the locating components for the caps. However, loosening the #4 cap and bonking the crank forward and rearward may give you a little clearance. Chances are, if the block was line honed, they ground a slight tilt into the cap. It's very common. I use layout dye and make a series of very light scratch cuts on the cap parting surface and shim the cap as necessary to make absolutely sure the cap is square in the grinder. It's tedious. If nothing else works for you, you can sand the front side of the thrust bearing on a surface plate with wet/dry paper and oil. I start with 280, then 320 and finish with 400 grit. When you can get an honest .003" minimum "free movement" you are done. Not a big deal. Good luck.
|