The heater of my Volvo S90 is no longer working right. There's air flowing out of the vents when I switch on the heater, but the air isn't warm enough to keep the cabin heated. What could be the problem here?
The problem here could be the thermostat, the one controlling the flow of the coolant in the engine. A stuck-open thermostat would lead to the coolant not heating up to the prescribed temperature. The heater malfunction could also be a result of having low coolant in the system. The coolant heats up the cabin by going through the heater core. When the system runs low on coolant, air pockets would build up. Air pockets would result in heat loss in the car interior. Aside from these probable causes, the heater problem could also be due to a clogged heater core or faulty heater control valves. Have the cooling system checked to find out why the heater isn't working. If there's dirt buildup, the system should be flushed. Do this regularly to prevent heating and cooling problems.
Why do wheels have to be balanced? When should this be done?
As a set, tires and wheels have to be balanced. So the rotational relationship they have with each other won't be altered or messed up, wheel balancing should be done when tires are removed, even if these are mounted on the same wheels. This is because when the tires are removed, they won't be clocked the same way as before. By making sure that the tires/wheels are balanced, vibrations, which could cause premature wear on suspension and steering components, would be minimized or even eliminated. Uneven tire wear could also be prevented. New balancing technology for wheels/tires make it easier to match mount the tires and wheels to maintain their ideal orientation to one another. This would lessen the weight needed to keep the new wheels properly balanced. A local installer could have these specialized tire/wheel balancers.
What does wheel fitment means? How do you determine the wheel fitment? What are the main considerations?
How does the wheel sit inside the fender wells? Basically, this is what wheel fitment is all about. When determining wheel fitment, you have to consider the offset and the wheel diameter. Wheel fitment would depend on your preference or eye for style. Flush wheel fitment, for instance, are done on some vehicles to give them vehicle a custom look or a sporty appearance unlike any other by keeping the wheels and tires as close to the fender lips as possible. For extreme flush fitment, suspensions, fenders, and alignments have to be altered or modified. Before you get this done, consider the kind of look you want to give your car and how wheel fitment will affect handling and drivability. Find just the right offset and wheel diameter to create the look that you want. The tires and wheels don't always have to be too close to the fender lips. The proximity of these components would be a matter of choice.
The Evolution of the Volvo S90
The Volvo S90 is a sedan package offered under the Volvo 960 Series, which are executive cars produced from 1990 to 1998. However, the S90 model was only in the market for two model years, 1997 and 1998, and received only a few upgrades throughout its production years. Despite its discontinuation, however, the Volvo S90 continues to be a good option for second-hand shoppers looking for an affordable, easy-to-drive, and easy-to-maintain Volvo vehicle.
1990-1994: The Volvo 960 enters the market
The history of the Volvo S90 can be traced back to the introduction of the Volvo 960, a replacement for the Volvo 760. It was the first vehicle to showcase Britain-based designer Peter Horbury’s creations. Basically an evolutionary progression of the 1990 760 model, the S90 shared several similarities with its predecessor. The most obvious difference was the new 24-valve DOHC inline six-cylinder engine that’s made of aluminum. This engine is widely known as the “white block” because of its bare aluminum color.
Over its first four years, the 960 received several upgrades. The list included redesigned seats and restyled seat belts that came with hydraulic pretensioners in 1992, a more ergonomic shifter in 1993, and dual airbags for the front seats in 1994. Also in 1994, a sliding sunshade replaced the opaque sunroof, and the 3L six-cylinder US models were re-tuned to increase torque but reduce power. This change in the engine was in accordance to stricter US emissions laws.
A special edition, the 960 Executive, was also released. This special version was the result of collaborative efforts between Volvo and Nilsson, a coachbuilder based in Sweden. The Executive was equipped with a sealed c-pillar window for more privacy for rear passengers, b-pillar inserts, and longer rear doors.
1994-1998: From 960 to S90
The 960 received another facelift in 1994 that included panels with colors that matched the exterior body and a new grille. The engine line-up was also expanded to include a smaller 2.5L six-cylinder engine. For vehicles released as 1995 models, the front suspension was restyled to make it more similar to that of the Volvo 850, while the rear suspension was equipped with a new multi-link independent system.
In 1996, the 960 sedan was renamed as the S90. This new name was implemented in several European markets and in the North American market in late 1996. Aside from renaming the vehcle, all units sold in the US were also equipped with an Aisin AW-series automatic transmission. In 1998, Volvo discontinued the S90.
Throughout its short history, the Volvo S90 proved to be one of the brand’s more reliable and durable models. As a matter of fact, after its production was ended, some 900 series models were re-used as chassis for ambulances because of their size and design.