In case any one was following my earlier post regarding changing coolant hoses on a 1992 325 IS, I know know for sure the following:
Hoses are not cheap. the hose "kit" that I purchased was 149.00 plus shipping, and does not include the three hoses that are at the back of the firewall (another 60 bucks from the local dealer.
I now know for sure that in order to replace all of the coolant hoses one MUST remove the intake manifold. (another 40-60 bucks in rubber o-rings which really should be replaced if the manifold has been in place more than a couple of months)
I also know that dealers will NOT tell you that you shold replace anything more than the upper and lower radiator hoses, and the cross over hose. (usually quoting about 300 bucks to do this) When I insisted that I wished to replace all o fthe hoses the dealer says " why would you do that, they shold be good for 200K miles or more. the factory doesn't advise us to even inspect them" I responded that this is a 12 year old car, and that rubber breaks down as a function of time as well as mileage. He says he disagrees. (if any of you has ever looked under a hood of a 5-7 year old turbocharged car, and grabbed a rubber or plastic house and felt is crack and crumble in your hands then you would know that heat and time are also contributing factors.
I FINALLY got a straight answer from BMW only repair shop. this guy said " i have a hard time convincing customers that 1000-1200 bucks for a preventive hose change is something they should do. Customers feel better about changing the main three hoses and if one of the others springs a leak they will deal with it then. "
Well, here is my preliminary thought about that concept based on holding all the new hoses in my grubby little hands: the construction and composition of all but one hose is the same!!! If you beleive you should change the upper lower and crossover hoses then you should beleive that you should change all of them since the seem to be subjected to the same hot coolant, the same engine compartment heat, and the same pressure that any of the other hoses are subjected to.
Tomoorow i will take off the manifold and change out my hoses. Many folks on other boards are waiting for the pictures/analysis of the condition of the insides of the old hoses. I am really curious myself. If it turns out that at 12 years 60K miles most of my hoses were in good condition, then I guess I will owe some folks some apologies, and many people will sigh with releif. on the other hand, if I find what I expect, there are a lot of folks that may want to consider spending a day and a few hundred bucks changing out these houses insted of perhaps upgrading their audio systems. (I am all for great audio, but somehow it is not quite as sweet listening to that thumping systyem on the side of the road waiting for the tow company becuase your car overheated).
I will post part three after the weekend