Originally Posted by LTD351V2
Concrete has same thermal expansion as steel.
Concrete in what form? There are so many types and uses. It's expansion/contraction rate varies as the mpa rating changes. And as different materials are used within concrete.
Apart from the excess heat grout worked ok in our engine but I'm not convinced it's as good as it's supposed to be.
If you fill the block to bottom of water pump holes as we did (exactly what we were told to do) are you not changing the expansion rates of the whole block?
The bottom of the block with grout can't expand at the same rate as the top (which has water or air in the passages).
Torque plates are used to get the best shaped cylinder one can get from the boring bar. So the pistons have a constant shape to work with.
Then we fill the bottom half with grout to stabilise and leave the top half untouched. And the top half has to deal with compression and ignition; where all the stress is.
I don't understand how it's best for the engine.