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Re: 95 540 Coolant leakage (archive)

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Posted by Paul on January 04, 1999 at 15:17:24:

In Reply to: 95 540 Coolant leakage posted by Arthur on January 04, 1999 at 07:42:41:

Check the 1/4" dia tube routed between the resevoir and the left-top of the radiator for obstructions, and/or leaks at the radiator end. Other than that, the pressure cap may be faulty.

You should be able to feel normal system pressure by sqeezing the radiator hoses when hot and comparing when cold, telling you the cap holds pressure.

Also, as there is no "coolant recovery" tank, there needs to be significant air space remaining in the resevoir when cold. It's marked with the correct level. Any overfill will get forced out. I've heard the level sensor is a common source of failure.

Are you parking on an uphill slope, or working the engine particularly hard before switching off?

I haven't seen any noticible coolant loss in the 5000 miles I've had my 530.


: Hi Folks,
: My 95 540 seems to be using some coolant. For the
: second time since I bought the car in august/september
: the "Coolant Level" indicator is flashing. On occasion
: there is some coolant leakage on the floor of the
: garage, but it doesn't happen all the time. After the
: first flash of the coolant indicator, I had the dealer
: check it out, but they said it was normal to use some
: coolant. It seem this is beyond the relm of normal
: usage. I have looked over the engine compartment top
: to bottom and am unable to see any obvious leaks. The
: spots on the garage floor seem to line up with the
: overflow from the coolant reservoir. Anybody know of
: any reason that I should be loosing coolant out the
: overflow? Any tips/suggestions welcomed.
: Thanks,
: Arthur

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