Cooling system overhaul complete $$, oil filter housing gasket complete $, belts and pulleys complete$, fresh oil no leaks! $, DIY -$. Compression test to find blown head gasket possible cracked head... Priceless
A very smart man once said if you want your 525i to go faster best bang for you buck. Sell it and buy a 540i. Any one no a good machine shop here on Oahu?