My two cents... keep the 16lb cap. If you are out and about and have to do a side of the road repair and have to use water based coolant. Youll still be ok
That's actually a good thought now that I think about it more.
The part that stinks is if you do have to add water to it they (Evan's) say to remove all the coolant and heat it to a certain temp for a certain amount of time to remove any water and then put it back in after the repair.
You also have to go through getting all the water out of the block again.
That would suck.:D
All that added up to not feeling it was worth messing with.
