I had a small overheating problem with my BMW'97 - 316i.
After about 30 minutes drive, I can smell something burning from the engine (temprature level is still in the middle range though), coolant level drops, and the radiator hose are stiff.
I was told (by a panelbeater) that the hoses aren't suppose to be stiff, it should still be squeezeable as when the engine is off. He also said that the overheating problem might be in the engine. & not the radiator , is he right?
Thanks in advance.... &
If you'd like to see the full story, read below :-):
A week ago I had a small rear bumper accident, wasn't that bad just a small dent.
A few days after the accident, when I was driving I noticed the engine temprature gauge reached the red level, but just when I was about to stop , the gauge miraculously back to half way mark, so I thought it must be just an error with the gauge or somethin. The next day it happens again, and again after reach the red for about a minute, it drops back to the normal level.
On the third day, it reached the red zone.. but this time I smell like something burning so I stopped and check the engine.. it smells like something burning & and there's a whizzing sound. I waited for a while for the engine to cool off and then went home, checked the coolant.. and found it's empty & refilled it. THe day after.. still the same problem, when I check the coolant level it drops .. but I can't see any dripping on the floor.
Bcoz of the accident, i brought my car to a panelbeater, and also told him about the overheating problem. When he tried to check, he tried to squeeze the upper radiator hose, and it was stiff. He said it's not suppose to be stiff. He said he'll check the radiator for me. He said no sign of leaking, and he said when he runs the engine for a while, the engine heats up.. end of story..
hopefully the long story helps your diagnosis :-)).. thanks heaps....