Looks like I will have to replace the head gasket, 1995 525i. Dripping coolant from the back of the engine, coolant in the oil - ugh! Bentley and others say to use the special tools to hold the camshafts in position, tension the timing chain, etc. Those tools are $$$ so is there a place to rent them? Or is it possible to do the job without them? I do lots of DIY but first time with H Gasket. Thanks.