Can air in cooling system cause idle problems?
If your vehicle at idle seems to have problems that aren’t consistent with the rough idle that you might get from engine misfires, as in it seems to idle up and down unpredictably, then there’s a good chance that you have air trapped in your coolant line somewhere.
Where are the coolant hoses in a car?
When identifying the different routes of coolant in your car, start by locating the radiator. It will be just in front of your engine, with an electric fan attached to it. The radiator will have two large hoses, each about 2 inches in diameter, attached to the sides or top and bottom.
What causes an engine to stall at idle?
When the valve fails, it may get stuck close or open, or even leak. It is when the valve remains open when engine idle suffers. Sometimes, the engine may stall at idle because of the lean of the air-fuel mixture.
When to remove an idle air control valve?
Because of the nature of this valve (large air volume processed) it should be serviced when a tune up is performed to remove “coking” which will hinder the valve’s performance. To perform a rough check of the idle air control, remove the valve while reconnecting the wiring harness.
What happens when you turn off the radiator in a car?
When you park your car and turn it off, the coolant will cool and contract. The radiator cap will then allow the coolant in the coolant reservoir to be drawn back into the system making sure air bubbles do not form as things cool down.
Do you have to replace the radiator hose?
Radiator hoses should be firm, but not hard. A hose that feels brittle, spongy or soft should be replaced, even if it’s just one spot on the hose that feels that way. A leaky radiator hose will cause your vehicle to lose coolant, which can cause more serious issues, like overheating.
Why are my coolant hoses degrading from the outside?
This coolant hose degraded from the outside. Coolant hoses also degrade when their outsides are exposed to direct contact with oil or other contaminants. This can occur, for example, when hot oil drips onto the rubber from a leaky engine.
How does the overflow hose in a radiator work?
An overflow hose runs between the radiator cap and the reservoir tank where extra coolant is stored (and added). As pressures within the cooling system change with coolant temperature, a valve in the radiator cap allows coolant to flow back into the reservoir to relieve pressure buildup which naturally occurs.
What causes coolant to leak out of a radiator?
If the radiator coolant overflow tank is damaged or cracked, then you can expect coolant fluid to leak out of it. Sometimes cracks will form on the overflow tank if it is too old and worn out. You should notice small puddles or drops of coolant on your garage floor or in your driveway. See Also: Best Radiator Stop Leak Products