Cabin Air Filters (Pollen Filters). Most late model Volvo®'s come standard with a cabin air filter. The purpose of these filters is to filter allergens, irritants and airborne particles. These can include bacteria, pollution, dust, odors and spores. The main benefit of these filters is passenger comfort, although failure to replace at the required 15,000 mile interval could impact the efficiency of the air conditioning and heating system. In addition no filter, clogged or missing filters may cause the premature corrosion of the A/C evaporator. Other symptoms that your filter may need to be replaced is the potential excess hazing of the windows. These filters are available and we recommend replacement every 15,000 miles. In heading into the summer season there are more of these particles in the air and keeping your A/C system in peak performance may require the replacement of these filters.
Saab® Turbo By-Pass Valves
Turbo by-pass valves, more commonly known as "hooter valves" are necessary for performance and idle control on Saab® 900 turbo and 9000 turbo models alike. As part of all major and minor inspections of these models, the hooter valve should be checked. Some indications that the hooter valve is not functioning properly are; inconsistent idling, a prominent "hooting" sound on deceleration, and. or noticeably decreased vehicle performance. The hooter valve (bosch part number 0 280 142 103) on a 900 turbo is located under the intake manifold with a vacuum hose coming off it. On a 9000 turbo it is located down near the turbo also with a vacuum hose coming off it. The most effective way to diagnose a failed hooter valve is to use the one of the most prized tools you own; YOUR MOUTH. Simply disconnect the vacuum line from it's source and suck on it, if the hooter valve does not hold vacuum, it needs to be replaced.
