Originally Posted by LAS97GT
Timing cover. Hey folks, can aluminum never tapped? Is it safe till The damaged one is replaced?
You can retap aluminum , example: if the bolt hole was a 1/2" redrill the hole to 17/32" ( hole should only be drilled out 1/32" oversized then retap with 9/16 tap , make sure you use the correct thread count , to determine this measure 1" from the bottom of the bolt then count the threads , example: if you count 18 threads the bolt you would need would be a 9/16x18 , if you tap the hole right it should last forever as long as you don't over torque the bolt , hope this helps!