I have a 2003 250 HPDI that is still under warranty until April. I carry it in about this time every year to have some routine maintence done, i.e. water pump/impeller but the prices my local dealer charges are ridiculous!!!! There is a local mechanic here who is one of the best there is that I was going to get to do it, but my question is will it void the warranty if you have work performed by anyone but a dealer or certified factory repair center?