am sure someone will b able to help here. 66 toro 425 block -two bolts in block either side of camshaft housing and behind timing cover .what is behind these please?
Similarly at rear of block and opp. rear cam housing --one frost plug? and a bolt which requires a hex key to undo --What are the purposes of these also tx
cheers
mike

 

Those are plugs in the ends of the main oil galleries. Very important. Also, be careful when you take them out, as a couple have very small holes to oil the distributor and timing chain and must be put back in the correct place.

 

Again , thankyou Joe