Originally posted by thunderbird92
I would like to know what this means. Just starting to learn engine. I am not a kid and I should know. What are the mains and do all engines have these. Thanks.
main caps hold the crank in the block. four bolts is the number on each cap that holds the cap to the engine block two bolts are used in stock stuff. hp stuff use more bolts or studs to hold the cap down on the block