[67ss&99ss]

Originally Posted by jim zag

I have discovered why so many Small Blocks leak in the front where the pan and timing cover meet. The new timing covers have the pan seal piece spot welded on with only a few spot welds. The oil coming out of the front main bearing goes in between the spot welds and leaks out in front of the pan gasket. Look at your timing cover. I took a flashlight and I could see light in between the pieces. The original GM covers had one long weld. I am now soldering this area before installing any covers. Make sure the front pan seal is a snug fit in the cover. Most aftermarket covers do not hold the front rubber seal tight. Use a pair of pliers to squeeze it together. Most of the aftermarket stuff from Taiwan or China does not fit well!

Agreed! I bought a trans dapt timing cover for my 406 when I had it built and it was a piece of sh*t! Within 50 miles of me putting the engine in, it blew the seal out of the front of the timing cover and it had oil everywhere! I will never use a cheap store bought timing cover again. Whenever I go to swap meets I always pick up a few original gm covers so that I will have plenty on hand for future rebuilds.