Water Pump/Timing Chain Cover Bolts

The bolts are all in blind holes, they don't enter the water jacket.  Be VERY careful on bolt length though, as you can damage the hole with too long of bolt and open it to the jacket.

Bob
tufcj

A little more explanation is in order for some of use who have witnessed water seepage and corrosion to those few fasteners, IIRC happens more on the passenger side of the water pump and timing cover housing. The bolts appear to be seeping coolant, they probably are, however it's not from the bolt holes in the block going into the water jackets as tufcj stated, it's coming from a leaky seal between the water pump and the timing cover or past the gasket between the block and the timing housing.The coolant seeps into the bolt threads and will corrode a steel bolt. I always use antisieze when installing bolts into a cast iron or aluminum part. Except of course for headbolts they get lubed as per the TSM or bolt supplier like ARP.