How to set correct timing of cam gear to cam alignment.

One of the local mechanics messed up the timing on the volvo while replacing the water pump and timing belt. Not sure why he removed the cam gears. We replaced the damaged valves but need to know how to correctly align the cam gear to cam for proper timing.

My car has 127000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. You will need to get a cam alignment gear or something that will hold the camshafts together. Then align up the camshafts to the correct alignment with both dots facing the two slots on the top of the engine. Then insert the timing camshaft lock tool to hold the camshaft from turning. Put on a new timing belt and adjust it tight. Then remove the camshaft timing lock tool. Rotate the engine 720 degrees and make sure that the dots realign up. If you need further assistance with timing your engine, then seek out a professional, such as one from Your Mechanic, to help you.

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Advancing the cam timing moves the valve opening and closing events earlier in the cycle. Since the relationship between the intake and exhaust lobes cannot be changed, advancing or retarding a cam affects both the intake and exhaust valve equally.
The two most popular methods include the use of a phaser to alter camshaft position and the use of multiple camshaft lobes with rocker arm coupling and de-coupling (both phaser and lobe switching methods can also be combined).
Advancing or retarding a camshaft`s timing from its original “zero” position causes the valve events to happen either earlier or later in the engine`s cycle. A camshaft that is advanced four degrees will cause each opening and closing event to occur four degrees of rotation sooner than before.
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.
A failing camshaft position sensor begins losing its ability to quickly transfer data. Mismatched fuel delivery and ignition timing, even if off by a few milliseconds, will cause your vehicle to sputter, accelerate poorly, lack power, stall or even shut off.
: the gear train with a two to one reduction through which the crankshaft drives the camshaft and thus controls valve timing in a four-stroke cycle internal-combustion engine.
There`re several ways to degree the camshaft position, but the most accurate and commonly used procedure is called the intake centerline method. We will need a few specialty tools to accomplish this task correctly and accurately. The most important tools are a dial indicator and a degree wheel.
The crankshaft drives the camshaft (via a timing belt, timing chain or pushrods), which in turn actuates the intake and exhaust valves. These valves allow the engine to inhale air (or an air/fuel mixture) and exhale the exhaust gasses.
The camshaft rotates at half the speed or revolutions as the crankshaft. So for every 360 degrees of rotation for the crankshaft the camshaft(s) only rotate 180 degrees. 4 stroke engines rotate 2 times for a complete cycle. That means it takes 720 crank degrees to make a full cycle.
See all 16 photos16 photos If your street engine doesn`t have a vacuum advance canister, you are limiting your engine`s part-throttle performance. The bigger the camshaft, the more it really needs part-throttle timing at low engine speeds.
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. The mixture then pushes against pistons that are still trying to compress the mixture. This causes loud pinging sounds to come from the engine.

Overhang-meshing gears, deflection of pinion/gear shaft, bearing wear, assembly error, poor adjustment of bearings and foundation are the reasons of misalignment in gear drives.
When rotating the crankshaft and turning the engine over, the camshafts will realign after the crankshaft has turned twice. Now, the marks on the timing chains will take around 15 rotations to line up on the timing marks on the sprockets.
To set your time and time zone in Windows 10, go to Start > Settings > Time & language > Date & time.
The ideal ignition timing for power occurs just before the point where detonation or pinging takes place. Correctly timed ignition will cause peak cylinder pressures to occur around 12 to 15 degrees after TDC.
Unfortunately, there`s no way to reset a camshaft position sensor. If you`re having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you`ll have to replace the part entirely.
Once you install your new camshaft, you may need to go through a break-in procedure, depending on what the manufacturer recommends. This can be quite an extensive job for some vehicles – and if you do it incorrectly, engine damage can occur.
The camshaft is connected via the timing chain and sprockets at a 1:2 ratio to the crankshaft and therefore revolves once for every two turns of the crank.
Cams with durations in the 195 to 210 degree range (measured at . 050˝ cam lift) are usually considered best for stock unmodified engines and those with computerized engine controls. Once you go beyond 210 to 220 degrees of duration, intake vacuum starts to drop.
The top three methods for controlling timing are chains, gear drives, and belt drives.
Definition of `ignition timing`

Ignition timing is the timing of the spark relative to the piston top dead center in a spark ignition engine. You can adjust the ignition timing to suit a fuel of a lower octane rating. The ignition timing ensures that the spark plug ignites the fuel at the optimum moment.

Finding the centerline is easy. Rotate the engine clockwise until you find the maximum lobe lift, then zero the indicator. Now rotate backward about 0.100 to 0.150-inch to compensate for timing chain slack. Then rotate clockwise until you reach 0.050 inch.
Rule of thumb: A cam with a wider lobe separation (112-116 degrees) allows torque to be spread over a larger portion of the engine`s rpm range and offers better power throughout the upper-rpm range.
Typically, a head with a high percentage can use a cam with more closely matched intake and exhaust lobe figures. Conversely, a head with a poor ratio between the intake and exhaust flow will benefit from more exhaust duration to evacuate the burned gases.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

How to set correct timing of cam gear to cam alignment.
ANSWER : Hi there. You will need to get a cam alignment gear or something that will hold the camshafts together. Then align up the camshafts to the correct alignment with both dots facing the two slots on the top of the engine. Then insert the timing camshaft lock tool to hold the camshaft from turning. Put on a new timing belt and adjust it tight. Then remove the camshaft timing lock tool. Rotate the engine 720 degrees and make sure that the dots realign up. If you need further assistance with timing your engine, then seek out a professional, such as one from Your Mechanic, to help you.

Gear Shuffling Problem in Vauxhall Vectra 52 Registration
ANSWER : Hi there. We don’t see a lot of Vauxhall Vectra’s here in the United States, so unfortunately, we’re not able to suggest a possible solution or cause of this problem you’re experiencing. You should consult with a professional mechanic in your home town to determine what’s causing the shifting problem you’re experiencing.

Loose gearbox that won’t find 2nd or 5th gear, sometimes hard to differentiate between 1st and 3rd.
ANSWER : There are a couple of possibilities. The first thing that comes to mind is of course the shifter itself. There is a nylon ball and socket joint at the base of the gearshift lever that sometimes falls apart, making the feel of the shifter very vague. Additionally, there are links to the transmission shift linkage that involve nylon bushings and joints that can fall apart. Both problems are very common on your car. The other less common possibility is that you have a bad motor mount that is allowing the transmission to move around too much when you try to shift gears. either way, it’s not a big deal to fix, and probably won’t require expensive transmission work. If you contact Your Mechanic, they can send a technician to your home or office to check out you shifting issue and let you know what repairs it will take to correct it.

My manual car won’t go into gear, it turns on and the clutch goes down perfectly fine. It happened after my gears grinded, the car
ANSWER : If the clutch mechanism is releasing properly, and the shift linkage is not malfunctioning, your transmission will have to be removed from the vehicle and inspected. Once a transmission has been removed from a vehicle, if the problem is a broken or worn part or parts, and the transmission has 100,000 miles or more, the most cost effective approach is to just simply rebuild the whole transmission. There are transmission rebuild kits that are sold just for this purpose. Rebuilding a transmission is no big deal and is indeed easier in many respects than rebuilding an engine. You can rebuild your transmission right in your own garage. You can NOT rebuild an engine in your own garage due to the highly specialized, and extremely costly, machine shop equipment required. Occasionally, mobile mechanics will take on a transmission rebuild job especially as once the mechanic removes the transmission from the vehicle, it is just simply a modular unit that can be easily transported to a mechanic’s shop and rebuilt right there and then returned to your vehicle. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Timing belt replacement: Cam gears are not lining up.
ANSWER : Hi there. You will have to remove the timing belt and turn the camshafts again to line them up to there marks. Now, one camshaft will stay in that position where the other one will be under spring tension. You will need something or a timing lock tool to keep the camshafts from turning before putting on the belt. Then your timing will be set properly. If you need further assistance with your timing belt replacement, then seek out a professional, such as one from Your Mechanic, to help you.

My manual gear box is starting to get a little bit "clunky" as i change gears, is there an additive i can add to the gear oil?
ANSWER : The first thing to do is to drain and check the oil to see if it has any broken chunks of metal or a lot of brass metal pieces that indicate the gears and synchronizers for the gears are bad. If no metal is found then replace oil with recommended oils for transmission. If metal is found then an internal transmission repair is needed.

Second gear misshifts when I drive, all other gears are fine.
ANSWER : Hello.

A transmission coming out of gear is most often caused by worn transmission components. It may be possible that the synchronizer rings, which are meant to smoothly mesh the gears inside of the transmission, have worn out and are no longer able to stay in gear.

It may also be possible that the gears themselves have worn out, and can no longer hold the torque of the engine. This is usually preceded or accompanied by a grinding noise when attempting to shift into that gear. If this is the case, it may be possible that the transmission may need to be rebuilt.

As transmission rebuilds can be expensive, I would recommend having the vehicle diagnosed by a professional technician who specializes in transmission, to determine if a rebuild is required.

2011 ford escape gear shift wont more from park to drive from time to time.
ANSWER : Hi there. The interlock solenoid in the shifter housing is not working and is causing the shifter to stay locked in the park position. This solenoid works with the brake switch. Check the brake switch and see if there is any loose connections. If the brake switch is working, then I recommend replacing the shifter interlock solenoid. If you need further assistance with your shifter issue, then seek out a professional, such as one from Your Mechanic, to help you.