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1993 945T 95K. I replaced all of the cooling system hoses and hose clamps. The previous owner replaced the radiator with a niessens. There were no leaks before replacing the hoses. The leaks occur at the end of most of the hoses, as if the clamps are not tight enough. I have tightened them quite a bit and think that they should be tight enough. I also replaced the expansion tank cap twice. Now I have a low pressure black one. The pressure in the system does not seem that high as I can squeeze the hoses without too much effort (when car is warmed up). I thought that it might be because I used aftermarket hoses. So I replaced the lower radiator (three way) hose with a Volvo part ($$). This leaks a bit less, but still does. Could it be the aftermarket hose clamps!? They seem to be of decent quality (all parts from FCP groton). The clamps are of the kind where the threads are on one side of the belt and don't pass through - so as to minimize damage to the rubber hose. I am at a loss. I am using the orange prestone coolant. I replaced the cooling system parts in my 740 before without a single leak.
One of these days, I hope that I will have the car working the way it should.
Thank you,
Steve
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1986 745 w/ M46 200K since new, 1995 965 104K
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