A vehicle’s mass airflow sensor, or MAF, is the component that measures the flow and density of the air flowing into the combustion chamber. It helps the car’s computer regulate the ratio of air to fuel. It’s a critical engine performance component, so if it fails or begins to fail, you should have it replaced immediately.
An engine’s MAP, which stands for manifold absolute pressure, sensor monitors the amount of pressure in the intake manifold, which is where air and fuel are introduced to the engine. The vehicle’s throttle body helps to increase or decrease the pressure in the intake manifold by opening or closing a specific amount. The MAP sensor will adjust the amount of fuel versus air taken into the engine, based on its pressure readings.
What will make noisy valve lifters quite making noise depends on why the valve lifters are making noise. The the valve lifters are making noise due to a bad lifters they will have to be pulled out and re-bored. If the noisy valve lifters are due to a bent push rod, this will need to be replaced to fix the noise.
Vehicles with conventional steering use idler arms to connect the ends of the tie rod to the vehicle’s front wheels. Over time the bearings in the arm’s bushings become worn, causing slack in the connection. Generally the only symptom of a bad idler arm is for the steering system to develop “play,” causing the vehicle to not respond to minor movements of the steering wheel. To diagnose a bad idler arm you only have to observe the connections as the wheels are turned.
The idle air control valve — also known as the idle speed control valve — regulates the idle speed of your engine. This is controlled by the engine’s computer. Sometimes parts go bad, which results in your car idling strangely or stalling. This article will tell you how to check an idle air control valve.
Suspension Types: Front
So far, our discussions have focused on how springs and dampers function on any given wheel. But the four wheels of a car work together in two independent systems — the two wheels connected by the front axle and the two wheels connected by the rear axle. That means that a car can and usually does have a different type of suspension on the front and back. Much is determined by whether a rigid axle binds the wheels or if the wheels are permitted to move independently. The former arrangement is known as a dependent system, while the latter arrangement is known as an independent system. In the following sections, we’ll look at some of the common types of front and back suspensions typically used on mainstream cars.
A rear end or differential rebuild is in your near future if the pinion seal is leaking or the differential is exhibiting excessive gear noise. Often, you hear gear whine or noise that becomes louder with increased vehicle speed, and the common result of over-worn gears or failing bearings. If the differential clunks or consistently thumps when the vehicle is cornering, most likely the rear end will fail soon.
If your differential is exhibiting these symptoms, a disassembly and rebuild needs to be performed.
Every rear end has a differential. There are many types available, but I will concentrate on the most common types, which are the open (or standard) differential and the limited-slip differential.
Every manufacturer has its own unique proprietary name for these limited-slip rear ends, but all differentials essentially function in the same way. I chose the Ford Traction-Lok as an example to rebuild, but keep in mind that it is very similar to the GM Eaton-style differential and others. These are relatively simple mechanical devices that are quite effective when compared to an open differential. If your limited-slip differential is worn out, you will end up laying down one of the most monstrous, single-wheel peels possible.
The head gasket plays a very important role in the function of your car’s engine, and a blown head gasket can cause serious damage and lead to major repairs. A head gasket is a seal that is fitted between the piston cylinder head and the engine block. The car’s engine is an internal combustion engine. For combustion to occur inside the piston chamber, high compression pressure must be achieved. The head gasket seals the combustion process and prevents the coolant and engine oil from mixing together in the combustion chamber. A blown head gasket can cause engine malfunction and significant loss of engine power [source: Bumbeck]. Let us now learn how to tell if you have a blown head gasket.
Watch your engine temperature gauge. If your car is constantly overheating it may be a symptom of a blown head gasket.
Check the engine coolant level. If the car is constantly losing coolant, it may be because your car’s coolant is leaking from the cooling system into the oil pan. This happens when the head gasket is blown.
Check your car’s oil level with the oil dipstick. If you notice froth on the dipstick, there may be coolant mixed in with the oil due to a faulty head gasket.
Watch for sweet smelling white smoke with water droplets coming from the exhaust pipe. This could be a sign that the head gasket has been blown off [source: Cars Direct].
What do you get in a reman engine?
When you choose a reman engine, you kiss your old engine and its nagging problems goodbye. In exchange, you get a “like new” engine that has been completely remanufactured from the block up. In addition to using many new components, the block, crankshaft and other durable parts are cleaned and remachined to original factory specifications.
Typical new components:
- Piston rings
- Oil pump
- Timing chain, gears, belt
- Connecting rod bearings
- Main bearings Pistons
- Valve train components