Chevy 3.1L/191 Cam Bearing Bore Issues - Engine Builder Magazine
Connect with us
Close Sidebar Panel Open Sidebar Panel

Tech Center

Chevy 3.1L/191 Cam Bearing Bore Issues


If a new cam bearing is installed in a bore that has been damaged, it will spin in the block, cut off the oil to the cam, and cause an immediate failure.

Click Here to Read More

Inspect the cam bores in all of the late 3.1L castings (10137093/ 10191737/ 24504089/ 24504150/ 10224227) very carefully, paying special attention to the #2 bore that seems to be the most prone to failure.

If the cam bore is oversize, there are only two choices:

1) You can either knurl the O.D. of the cam bearing to get enough press fit, or 2) you can junk the block.

 For more information about GM’s V6 engine family, read Doug Anderson’s article from the March issue of Engine Builder here.

Engine Builder Magazine