Diagram for timing marks for crank shaft and oil pump for 2004 hyundai sonata

Optional Information:
Year: 2004
Make: Hyundai
Model: sonata
Engine: 2.4

hyundai timing belt

Be aware the oil pump pulley drives a balance shaft, and due to the gear reduction in the oil pump the timing mark is only correct once every 720 degrees. Meaning if the oil pump sprocket has spun with the belt off the vehicle and you realign it to the timing mark you have a one in two chance of it being correct. To verify you have the correct position, there is a 14mm bolt in the left hand side of the block (right on the balance shaft ‘tunnel’. When this bolt is removed, you will be able to stick a screwdriver or othr metal object 2.5 inches into the block when it is in the correct position; the shaft also will not turn more than 15 degrees in either direction. When you are out of phase, you will only be able to go in about one inch.

Replacing Your Car’s Timing Belt

Knowing When To Change A Timing Belt

Changing a timing belt on your vehicle can be a very time consuming. This is due to the fact that there are a lot of components under your hood that must be removed before you can even get to your vehicle’s timing belt. This is why it is best to change a timing belt at the same time that you are planning on doing other repairs and maintenance practices to your vehicle such as putting on a replacement water pump or changing belts like the serpentine, air conditioner or water pump belt.
Timing belts tend to begin breaking down at around 60,000 miles. You will notice the power to your vehicle begin to slow down, the fuel efficiency of your vehicle can be affected as well as your vehicle showing signs of working harder.
How To Change A Timing Belt or Timing Chain
Different vehicles have different patterns for changing a timing belt or timing chain. The best thing to do when you want to change the timing belt is to look over your owner’s manual that is specific for your make and model vehicle. You can also purchase an automobile repair manual that is designed specifically for the needs of your automobile at any automotive repair shop in your local area.
The basics to changing a timing belt on the vehicle however are pretty much uniform. The steps to do this are as follows:
Step 1. Before you can replace the timing belt on any vehicle it is a good idea to let the vehicle sit overnight so that the engine is completely cool and there is a reduced chance of experiencing serious burns from the engine.
Step 2. As it is with most vehicle repairs you must first disconnect any power supply to the vehicle. This means that the battery cables must be removed from the battery terminal and tied back so that there is no risk of them touching the posts or other parts of the vehicle while working.
Step 3. Place blocks in front and behind the wheels of your vehicle so that there is not chance of the vehicle rolling and accidentally causing injuries to you or others who may be around.
You will now need to remove any obstructions that may be in the way of getting to your timing belt. This includes:
Step 4. Make sure that the air intake assembly to your vehicle is completely removed.
Step 5. Locate the pulley that powers the supply to your water pump if this is in the way on your vehicle. You will need to loosen the bolt holding this pulley in place.
Step 6. For some vehicles it may be necessary to do the same for other equipment such as the power steering pump. This will require you to loosen the bolt and remove the belt that is around the pulley. You can then unbolt the power steering pump and move it out of your way.
Step 7. Line up the mark on your crankshaft pulley to the O that is on the timing scale with a large wrench. You can find the timing scale molded on your vehicle engine block.
Step 8. Using the right sized socket you will have to removed the bolts that are holding the timing belt cover on. When you have the bolts removed you can then pull off the timing belt cover.
Step 9. Inspect the timing belt tensioned bearings for any looseness or noise. If these problems exist you will need to replace the timing belt tensioned bearings as well.
Step 10. Locate your camshaft and check to makes sure there are no leaks in the crankshaft or camshaft seals. If you do notice leaking this could be an early sign that there will be premature failure for your new timing belt. It is best to replace these seals now instead of waiting for bigger problems and the chance of having to do all of this work again.
Step 11. For most vehicle makes and models you should now be able to locate the timing belt. Make sure that all timing marks on your belt are properly lined up. Loosen the timing belt tensioned and you will then be able to remove the timing belt very easily. Make sure that the camshaft and crankshaft for your vehicle’s engine are secured and that they do not move while your timing belt is off of your vehicle.
Step 12. Place your new timing belt on the same way that you removed it. Make any tension adjustments to the timing belt as necessary. Inspect the new belt to make sure that it is fitting over the teeth for the timing sprockets correctly. Makes sure that you do not over tighten the belt.
Step 13. When replacing the timing belt cover install a new gasket to seal the cover correctly. Do not use an old gasket as this will not seal properly.
Step 14. If you had to remove any pumps at the beginning of this project you will now have to hook them back up again. This includes the water pump, power steering pump as well as any other accessories that may have gotten in the way at the beginning of this project.
Step 15. Visually inspect all timing marks to make sure that they are still aligned correctly.
Step 16. Reinstall your vehicle’s air intake assembly that was removed in the beginning.
Step 17. Reconnect your vehicle’s battery. Make sure that there is no corrosion around the posts or the battery cables while you are at this step.
Step 18. Turn on your vehicle and look for any problem areas such as leaks that there may be prior to driving your vehicle. Do not hesitate or postpone any repairs that may be needed.

Replace Your Timing Chain

What you will need:

1. Combination Wrenches
2. A Socket Set
3. Torque Wrench
3. A Harmonic Balancer Puller
5. A Three-jaw Gear Puller
6. Screwdrivers
7. Hammer and Punch
8. Gasket Scraper
9. Timing Light
10. Tube of Silicone Sealer
11. Timing Chain Cover Gasket Set
12. New Timing Chain and Gears
13. Drain Pan
14. Antifreeze
15. Jack
16. Jack stands

Before You Start:

Follow these instructions carefully. Read and be sure you understand them before you begin.
Gather together all of your tools and supplies before you begin.
Allow plenty of time to do the job so you don’t have to hurry.
Remember that these are general instructions. For more detailed instructions pertaining to your specific vehicle, consult an appropriate repair manual.
Safety is important whenever you’re working around machinery. Beware of hot objects, sharp instruments and hazardous materials.
Don’t substitute tools unless you’re sure you won’t compromise either your safety or the performance of your vehicle.
Never work on a vehicle that is only supported by a jack. Use jack stands to support the vehicle while you work. Work on a solid, level surface. Never jack a car up on dirt or grass.
Why Replace Your Timing Chain?

Over time, wear on internal working parts of your engine will spell the need for replacement. One of the internal working parts that wear is the timing chain and timing sprockets. The timing chain and sprockets are the connecting line between the crankshaft and the camshaft. As the crankshaft turns, via the timing chain, it drives the camshaft that operates the engine’s valves via the lifters, push rods and rocker arm assemblies The timing of the valves opening and closing at precise intervals is crucial for proper engine operation. As the timing chain and sprockets wear, this precise timing of the valves gradually changes, eventually to a point where replacement is necessary.

Telltale signs of worn out timing chains are:

Rough idle.
Sluggish performance and poor economy.
Sudden engine performance change including the inability to start the engine.
Intermittent backfire through the intake manifold.
Inconsistent ignition timing or a clattering noise coming from the front of the engine.
Before starting the disassembly procedures, I would suggest cleaning the engine with an engine degreaser. A clean engine is easier to work on and helps prevent dirt or contamination from entering the engine during disassembly.

Differen types of car engines

Engine to a car is like a heart to a human person. It functions by the principle of combustion or burning the fuel. There are different methods of classifying car engines. This classification is usually done according to the number of cylinders, the type of fuel used, and the arrangement of cylinders.
Type of fuel used
A car engine may either use petrol (gasoline) or diesel. Petrol engines use spark plugs for ignition. Diesel engines on the other hand use compression for ignition. The diesel engine is quite heavier than the gasoline engine. The gasoline (petroleum) engines are more common than diesel engines.
Number of cylinders
A car engine can have from three to twelve cylinders. The number of cylinders affects the power of the car. An eight-cylinder engine would be more powerful than a four-cylinder engine, though it would also consume a lot more fuel.
Arrangement of cylinders
In a car engine, you will find the cylinders are usually arranged in one of two ways. The cylinders could be inclined in a “V” shape or in a straight row. In that case, V-8 engine is an engine with eight cylinders inclined in a V shape. The earliest form of engine was known as the rotary cylinder engine. The cylinders in a rotary engine are arranged in a round manner with the crankshaft surrounded by a revolving block of cylinders. However, the rotary engines are quite rare today.
Other classifications
Engines may also be classified as to how they cool. A car may either use liquid coolant or air coolant. A car engine may also be classified according to the number of strokes, that is, four stroke, eight stroke and so on. Final thing to add here is that car engines can also have either a timing chain or a timing belt. Timing belt serves to regulate the timing of the valves of the engine. Timing chains may last longer than timing belts as they do not stretch and wear out due to tension.

Timing Belt Tech Data and Replacement Intervals for Acura

Your timing belt should be replaced every 50-70,000 miles. Carmakers have specified the replacement intervals for timing belts. In this database you will find these timing belt replacement intervals along with a little technical information regarding the valve configuration – interference or non-interference. In an interference engine, the valves and piston share the same air space. They never touch, unless your timing belt breaks or skips, and this is a catastrophic failure that requires removing the head and replacing bent valves. Non-interference engines do not risk this contact if the timing belt goes. Nonetheless, either can leave you stranded, so regular timing belt replacement is very important.

Be sure to replace your timing belt at the required intervals for your Acura. Timing belt replacement is crucial to the life of your engine. Interference type engines can suffer expensive damage in the case of timing belt failure. Bent valves are not cheap to replace! Below are the timing belt maintenance intervals and info for Acura cars.

Audi Timing Belt Tech Data and Replacement Intervals

Your timing belt AUDI should be replaced every 50-70,000 miles. Carmakers have specified the replacement intervals for timing belts. In this database you will find these timing belt replacement intervals along with a little technical information regarding the valve configuration – interference or non-interference. In an interference engine, the valves and piston share the same air space. They never touch, unless your timing belt breaks or skips, and this is a catastrophic failure that requires removing the head and replacing bent valves. Non-interference engines do not risk this contact if the timing belt goes. Nonetheless, either can leave you stranded, so regular timing belt replacement is very important.

Be sure to replace your timing belt at the required intervals for your Audi. Timing belt replacement is crucial to the life of your engine. Interference type engines can suffer expensive damage in the case of timing belt failure. Bent valves are not cheap to replace! Below are the timing belt maintenance intervals and info for Audi cars.

Chrysler Timing Belt Tech Data and Replacement Intervals

Your timing belt should be replaced every 50-70,000 miles. Carmakers have specified the replacement intervals for timing belts. In this database you will find these timing belt replacement intervals along with a little technical information regarding the valve configuration – interference or non-interference. In an interference engine, the valves and piston share the same air space. They never touch, unless your timing belt breaks or skips, and this is a catastrophic failure that requires removing the head and replacing bent valves. Non-interference engines do not risk this contact if the timing belt goes. Nonetheless, either can leave you stranded, so regular timing belt replacement is very important.

Be sure to replace your timing belt at the required intervals for your Chrysler. Timing belt replacement is crucial to the life of your engine. Interference type engines can suffer expensive damage in the case of timing belt failure. Bent valves are not cheap to replace! Below are the timing belt maintenance intervals and info for Chrysler cars.

Daihatsu and Daewoo Timing Belt Tech Data and Replacement Intervals

Your timing belt should be replaced every 50-70,000 miles. Carmakers have specified the replacement intervals for timing belts. In this database you will find these timing belt replacement intervals along with a little technical information regarding the valve configuration – interference or non-interference. In an interference engine, the valves and piston share the same air space. They never touch, unless your timing belt breaks or skips, and this is a catastrophic failure that requires removing the head and replacing bent valves. Non-interference engines do not risk this contact if the timing belt goes. Nonetheless, either can leave you stranded, so regular timing belt replacement is very important.

Be sure to replace your timing belt at the required intervals for your Daewoo or Daihatsu. Timing belt replacement is crucial to the life of your engine. Interference type engines can suffer expensive damage in the case of timing belt failure. Bent valves are not cheap to replace! Below are the timing belt maintenance intervals and info for Daewoo or Daihatsu cars.

Ford Timing Belt Tech Data and Replacement Intervals

Your timing belt should be replaced every 50-70,000 miles. Carmakers have specified the replacement intervals for timing belts. In this database you will find these timing belt replacement intervals along with a little technical information regarding the valve configuration – interference or non-interference. In an interference engine, the valves and piston share the same air space. They never touch, unless your timing belt breaks or skips, and this is a catastrophic failure that requires removing the head and replacing bent valves. Non-interference engines do not risk this contact if the timing belt goes. Nonetheless, either can leave you stranded, so regular timing belt replacement is very important.


Be sure to replace your timing belt at the required intervals for your Ford. Timing belt replacement is crucial to the life of your engine. Interference type engines can suffer expensive damage in the case of timing belt failure. Bent valves are not cheap to replace! Below are the timing belt maintenance intervals and info for Ford cars.