Bravo! Usually something simple, glad it was easy to find once you had the
proper tool.
Max Dillon
Charleston SC
Aug 7, 2020 11:42:17 PM Craig via Mercedes :
> I rented a cooling system pressure tester from the local (well, in
> Edgewood, 15 miles away) O'Reilly Auto Parts. (picture 1)
>
> I tried using it as manufactured, but got tired really quickly trying to
> pump air into the system with the little supplied pump.
>
> I then took it apart and used the part which connects to the coolant
> reservoir cap along with some parts I had around here. (picture 2)
>
> I set the supplied air pressure to 10 psi and then hooked it up to the
> coolant reservoir. (picture 3)
>
> I was able to hear air flowing and was able to trace the source of the
> major leak. I fixed that and will pressurize the system again tomorrow
> and attempt to seal the air supply so I can see if it holds pressure for
> a length of time.
>
> If it does, I will then hook up my vacuum-assisted cooling system
> refiller, see how it does at holding a vacuum, and then, if successful,
> fill the car's cooling system with a 50% mixture of G-05.
>
> Craig
>
> P.S. If you want to know what the major leak was, it was the lower
> radiator hose clamp I thought I had tightened when I put everything
> related to the serpentine belt back together. It does not help to
> take so long between starting a repair and finishing it!
>
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