15-07-2021, 09:43 AM
I have found Sikaflex quite good for sealing the bottom of the block; it has 2 functions: it seals and it is an adhesive. If used on a properly cleaned pair of surfaces you will have to use levers to remove the block. It does not eliminate the need to tighten down properly. As for silicone sealants they only work properly when applied to very clean surfaces. As for the core plug above the oil pump I suggest Wellseal.