Aluminum engines blocks are a soft metal blockThat piston rings wear out of roundWhich causes engine blow by during the compression stoke.With polymer having a strong tinsel strenth?
NO! They are alloys of AL, so that the block doesn't melt of give way to forces or heat inside the engineAL is a good conductor of heat which makes it ideal for use in an engine block, not to mention it is drastically lighter than ironThat is why cast iron is going out of vogue for making internal combustion engines.
