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Old 03-09-2003, 09:55 PM
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Mike Murrell Mike Murrell is offline
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Larry:

Unless the leak is glaring, you may not find it until you do as Kestas suggested and pressurize the system.

Auto Zone(and other mass marketers) rent a pressure tester for about $75.00. They let me keep it 3 days. You pay $75.00 when you rent it and they refund all $75.00 when you return it.

You perform this test on a cold engine. I had a bear of a leak awhile back on a 103 motor and would have never figured it out had I not rented this gadget.

You pull the radiator/expansion tank cap, connect an adapter if needed, then hook up the pressure tester. You pump it up by hand just like you would an old style tire pump.
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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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