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Third on pressure testing Posted by Bill Homer [Email] (#3427) [Profile/Gallery] (more from Bill Homer) on Thu, 30 May 2019 16:01:28 In Reply to: Re: LOSING COOLANT 1997 Aero - SUGGESTIONS, Simon S, Wed, 29 May 2019 09:13:39 Members do not see ads below this line. - Help Keep This Site Online - Signup |
On my Volvo 740 Turbo, pressurizing the cooling system with the car stationary showed leaks at both the heater control valve (actually a shutoff valve for the A/C on that car) and from the shaft of the water pump behind the pulley. Two minor leaks combined equaled a big enough leak to be concerned about. Replaced both parts, haven't added coolant for the last year.
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