Monthly Archives: May 2018

The Harm in Skipping an Oil Change

Some new are now recommending much higher oil change intervals than they have in the past. As much as 5,000 to 10,000 miles, or 10,000 to 15,000 kilometers, or more. Following these recommendations is very important to avoid engine damage. When Portland drivers go too long between oil changes, oil starts to turn to sludge. This causes small oil passages to clog and engine parts to fail. What causes oil sludge? It's a factor of time and mileage. There are hot spots in every vehicle engine that cause oil burn off that leads to sludge. Also, water from normal condensation can build up in the oil. This water also creates sludge. Severe driving conditions in CT lead to more rapid sludge formation. Severe driving includes short trips around Portland or trips in freezing CT conditions. The engine just doesn't get warm enough for the water in the oil to evaporate. Severe conditions are at the heart of the problem. Stop and go ... read more

Heater Core

Portland drivers may wonder where the air in a vehicle's passenger compartment comes from. Well, as your engine starts to warm up, it also warms the coolant/antifreeze that circulates around the engine and through the radiator. There is also a hose that carries coolant/antifreeze from the engine to the heater core and another that takes it back into the engine. The heater core looks like a little radiator and lives in the air blend box behind the dashboard. When you turn on the heat, air blows over the heater core, is warmed, and comes into the cabin. Some vehicles have a heater valve that moves coolant through the heater core when the heat is on and bypasses the heater core when the heat is off. In other vehicles, the temperature of the air is controlled within the air blend box by how much air is directed over the heater core. The engine cooling system, in a larger sense, also encompasses the heater core. Things that adversely affect, say, your radiator will ... read more

When do I need to replace my battery?

Question:When do I need to replace my battery? Hometown Garage Answer: That's a good question for Portland drivers. All batteries wear out and need to be replaced – but some are replaced before their time. Look, if your battery is dying and you need a jump-start, it could very well be that you have a bad battery. But Portland drivers should have Hometown Garage test the battery first to see if it's actually bad. The problem could be parasitic drain or a bad alternator that's not properly charging your battery. And Portland drivers in this situation also need to have their service advisor check their alternator and have it tested. A surprisingly high percentage of “bad” alternators brought into Hometown Garage in Portland are actually just fine: the problem is a worn serpentine belt and/or belt tensioner. If the belt is slipping, it's not spinning the alternator properly so it can't fu ... read more

Air Conditioning

Question:Why isn't my air conditioner blowing cold air? Hometown Garage Answer: Your air conditioning system uses refrigerant to create cold air. The most common reasons Portland drivers lose their cold air have to do with the refrigerant. The first is not enough refrigerant. Refrigerant is a gas in the system, and very small holes in a hose, seal or coupler can allow enough to leak out to prevent the creation of cold air. Another potential problem for Portland auto owners is contamination. Over time the inside of the rubber hoses can deteriorate, and little bits of rubber can clog up various filters and other parts of the vehicle A/C system, preventing proper circulation of the refrigerant. And a component could also be worn or broken. So the first step for Portland drivers who can't cool their vehicle is a thorough air conditioning inspection, looking for leaks and worn parts. In ... read more

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