Front Motor Mount Bolt leaks

C

C1Nelson

Member
I have a motor that the front motor mount yoke bolt leaks oil. It is on the left side as you look at the motor. I am going to put some thread sealer on the 1/2 x 13 x 1 1/8” bolt but was surprised when I saw oil.

I am wondering if all if these holes go into the block deep enough to leak? Or has this motor at some time been drilled deeper?

I have had four different motors and never had oil leak behind the bolt.

Has anyone else had this happen.
 
Last edited:
C1Nelson said:
I have a motor that the front motor mount yoke bolt leaks oil. It is on the left side as you look at the motor. I am going to put some thread sealer on the 1/2 x 13 x 1 1/8” bolt but was surprised when I saw oil.

I am wondering if all if these holes go into the block deep enough to leak? Or has this motor at some time been drilled deeper?

I have had four different motors and never had oil leak behind the bolt.

Has anyone else had this happen.
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If we are speaking of a Model-A engine, the block does have a hole that goes thru however it is the timing cover that locates the bolt. Thread sealer or teflon tape will suffice but I would think the immediate problem is you ae using an inferior bolt that has undersized threads.
 
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