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At minimum a jumped timing belt will cause a noticeable running problem and/or a Check Engine Light. In many cases a jumped timing belt will cause some engine damage. A timing belt can also strip teeth off, shred, or break entirely.
Engine Won’t Start: If the engine timing belt has broken, it won’t be able to start. You may hear it “engage” as it is trying to start as you turn the key, but because the engine timing belt is what operates the camshaft and crank that turns the engine, it isn’t able to start.
Signs Your Ignition Timing Is Off
Some things to look out for: Engine knocking: Engine knocking occurs when the air-fuel mixture is ignited too soon in the cylinder. … Low Power: Ignition timing that is retarded too far can result in the spark plug igniting the mixture too late. This can reduce the power of your engine.
to set your base timing without a light, you just turn the motor over in it’s normal direction of rotation until the mark lines up with where you want it.. loosen up the distributor and hook up a spare spark plug to the #1 plug wire.. turn the distributor until it sparks..
A failing bad timing belt sounds like a ticking noise in front of your car when it starts wearing out. If the belt eventually breaks, it will give a whining noise when trying to start the engine. A whining noise sounds like no compression in the engine.
You cannot drive a car if the timing belt is broken, it’s as simple as that. The timing belt looks just like a rubber belt with teeth on the inside. … The most common thing that’s going to happen if your timing belt fails while you’re driving is that the valves are going to get bent.
Valve timing
In order for a four-cycle engine to work correctly, the valves must open and close at fairly precise times. … If the valve timing is incorrect, not only will the engine not run, but the piston could smash into the valves, causing catastrophic damage. Usually, the result is bent valves and damaged pistons.
If the timing is off, damage can occur. In some engines, called “interference engines,” the consequences can be especially bad. … You could end up having to have your engine rebuilt, or even replaced. If your cam timing is off, chances are you’ll know because your car will not be running well, if it’s running at all.
Incorrect timing is the most overlooked and misdiagnosed cause of a no-start. Perhaps you automatically think of ignition timing as the position of the crankshaft when the No. 1 plug fires. While this is important, it isn’t the only timing condition that can influence a no-start.
When any changes are made to the engine of a car, the ignition timing is adjusted accordingly. If not, you could experience several problems with your engine with improper ignition timing like knocking, hard to start, increase fuel usage, overheating, and reduced power.
I call this method of adjustment, “Timing by ear”, because you literally set the timing by sound. It’s not as hard as it sounds (no pun intended). Automotive manufactures do supply ignition timing setting for every application. You could simply use a timing light, and set the engine to that setting.
When you hear a rattle or unusual sound, it means that there is a problem with the engine. When the timing chain is loose, it can cause a vibration in the motor resulting in a rattling noise as the engine idles or when starting. If you hear a rattle, it means something is loose and needs to be fixed before it breaks.
The average cost to replace a timing belt will be anywhere from $300 to $500 in total (more for larger cars, trucks, and SUVs). The timing belt itself will usually only cost less than $50 but the majority of a timing belt job is spent on labor. The cost of the labor will be anywhere from $250 to $450 or more.
Ticking or clicking noises in the engine.
When the timing belt wears out, it can cause a ticking or clicking sound to emanate from the engine. … If the tensioner has no oil pressure, the belt will become loose and possibly disengage from the pulleys and/or break.
Misalignment is one of the main causes of the timing belt drive failure and can cause a broken timing belt. Excessive or uneven tooth wear on the timing belt, the belt tracking and tensile failure, and tensile damage can all be attributed to misalignment of the timing belt.
Once your valves start to lose their proper clearance, they’ll be easy to notice. Your car may have a rough time idling, especially before it has time to warm up. This rough idling is caused by the valve opening late, choking off fuel. Stalling after a cold start is common.
It can be varied by modifying the camshaft, or it can be varied during engine operation by variable valve timing. It is also affected by the adjustment of the valve mechanism, and particularly by the tappet clearance.
A worn out timing belt might also impact the engine’s fire rate. … However, sometimes the belt will slip on the camshaft drive and cause one cylinder to open or close earlier than it should. This might cause a misfire situation and if not replaced soon, may result in catastrophic engine damage.
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