Oil Pan Information

I had to knotch the oil pan to clear the rack and pinion unit. I rolled some sheet steel on an old steering column and then use it as a template to mark the oil pan knotch. I cut out the oil pan knotch and MIG welded the sheet steel in place. I then ground down the welds so it would look pretty but found that there were pinhole leaks and some pretty thin spots. So I rewelded all the seams and left the bead on. I'd rather have it strong and reliable than pretty and questionable.

knotched oil pan

Knotched oil pan upside down on engine stand

Naturally, the oil pickup screen interfered with the knotch and wouldn't allow the pan to sit flush against the block. So I found that a Milodon 18307 pickup screen would work with some minor modifications with a persuader (hammer).

Three types of SBC Oil Pans - There are basically 3 types of SBC oil pans:

  1. 1955-79 - This model is identified by the dipstick on the passenger's side and a two piece rear oil seal
  2. 1980-85 - This model is identified by the dipstick on the driver's side and a two piece rear oil seal
  3. 1986 and up - This model is identified by the dipstick on the driver's side and a one piece rear oil seal. If you remove the trans flywheel shield and look at the crank flange. If no flange then its a one piece. The one piece pans all have studs and nuts on the rear inner pan bolts. Older motors just had bolts.

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Copyright May, 2011 Eugene Blanchard