coaster wrote: ↑
Thu Feb 06, 2020 1:46 pm
The TJ V10 had an experimental brass bedplate clamped to an aluminium upper cylinder block.
The 2 different materials have expansion rates that dont match up ideal.
Does anybody have experience with such a difficult design problem, insights?
Not much of a problem.
Look at all the engines with aluminium heads on cast iron block running around with no trouble.
The bottom end is cooler and has less of a thermal gradient than the block/head joint.
In fact there are many examples of mating components in engines that have very different coefficients of thermal expansion: head/valve seats , head/valve guides, head/exhaust manifolds, any aluminium component bolted with a steel bolt, carbon fibre brackets bolted to aluminium (probably the most extreme combination).
As long as the components are designed to cope with the induced thermal stresses it shouldn't be a problem.