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How to set the top dead center correctly. Bringing the piston of the first cylinder to the position of the top dead center (TDC) of the end of the compression stroke



what kind of car?


well it is written ..... 21083



Firstly, in my memory, all my life, everything has been done ....... a screwdriver in the first cylinder ..... and twist .... let the "oblique" TDC, but it will be ...... .....
Then, whatever one may say, but the mark should still be on the crankshaft pulley, at least foreign cars have this.
The uterus is on the flywheel. Is she not there either?

And then, even if there are NO marks, I still don't understand your problem ...
Set the TDC screwdriver, put on the timing belt and try to start ........ Start ..... will "sneeze", "cough", fold the timing belt and try to throw the timing belt to +5, -5 camshaft teeth .. ..... In 10 operations you should be able to do it.

By the way, I could be wrong, but, in my opinion, the label should still be on the distributor .... google a little ... you can find something worthwhile.
But I've always done exactly as described above ..... So good luck ...

well it is written ..... 21083



P.S. never had a problem with that

what kind of car?
Actually, I don’t know, on this Nexia I made a mistake, so the car became a dull horror. I set it up normally - I went. To check it, I put it forward one more tooth, it became dull again. It was only experimentally on the check \u003d)


vaz-2108



but this is already a poke method this is 1

how is there no mark on the flywheel?
is there a mark on the RV pulley? is there a mark on the alternator pulley?


What mark on the generator are you talking about ?! Isn't it driven by a poly V-belt or a V-belt?

yes the car does not seem to be stupid for acceleration, but it eats too much even for winter, and the ignition is somehow not that. either without detonation, but you will start a hell, or it starts from half a turn / from 1 turn, but the detonation seems to be like 76 gasoline
you can, of course, rearrange it on the tooth or vice versa (the valve does not bend on this engine)
but this is already a poke method this is 1
i would like to know how many degrees in order to understand why the detonation (too early ignition or a bad mix)


cheto you are wise, Recruit ....... put up marks, turn ON HEAR the ignition and everything will be normal ...

corrected on time))))


align with the mark on the alternator drive pulley (the one on the crankshaft). The mark seems to be aligned with the mark on the casing (which the belt covers).
Never looked at the mark on the flywheel

as far as I remember, the mark should be on the generator drive pulley (the one on the crankshaft)



Where did you see about the generator in this article?))))

During various renovation worksduring which you have to remove the drive chain camshaft or when removing the camshaft itself, so that during subsequent assembly does not violate the timing of the valve timing, it is necessary to set the piston of the fourth cylinder to the TDC (top dead center) position of the compression stroke. TDC is also set when adjusting the valves.

Top dead center is established by aligning the mark on the camshaft sprocket with the mark on the camshaft cover. After aligning the marks on the sprocket and the camshaft cover, make sure that the marks on the pulley match crankshaft and the camshaft timing chain cover. If the marks do not match, then most likely the valve timing is broken.

If the valve timing is violated, that is, when the marks are aligned, the piston of the fourth cylinder is not at TDC, it is necessary to remove the camshaft chain from the sprocket and turn the crankshaft to align the marks, and then reinstall the chain.

by this you want to say that the crankshaft and generator pulley is all one pulley ???)))) that I am already laughing ....... honestly


read carefully and do not find fault. Everyone seems to understand what kind of pulley. And I wrote that he is on the crankshaft

i would like to know how many degrees in order to understand why the detonation (too early ignition or bad mixture)


In general, do not use a brain and do everything as I wrote them. I hope that your motor is ideal or close to this state ..........

You will not invent anything new here and you will not invent anything .......
And if you don't understand, then as he says Vmih - study materiel by iCE operation and injections will be much more useful to you

yes the car does not seem to be stupid for acceleration, but it eats too much even for winter, and the ignition is somehow not that. either without detonation, but you will start a hell, or it starts from half a turn / from 1 turn, but the detonation seems to be like 76 gasoline
you can, of course, rearrange it on the tooth or vice versa (the valve does not bend on this engine)
but this is already a poke method this is 1
i would like to know how many degrees in order to understand why the detonation (too early ignition or bad mixture)


try + -1 tooth, though you will have to turn the ignition every time. Most likely it is 1 tooth behind, the chain (belt) stretched out and got lost.
so or not (it will be necessary to check, so it will at least explain everything) now I cannot say
but if you put the flywheel on this mark, then the mark on the PB is approximately 140 degrees from the "target"
i can draw, but I think there will be no practical benefit from it

is there a mark on the RV pulley? is there a mark on the alternator pulley?
21083 - i.e. carb? or is 2111 an injector? in the second case, it can be set to zero on the assembled motor using an oscilloscope. and zero is absolute. not zero for labels.


there is a mark on the RV pulley (tide)
by the way, the RV pulley could also stand crooked if the key was lost
but half a year ago or less, when they turned the flywheel and looked for TDC, it was found out that the PB pulley is right or almost right
you need to skew a maximum of 1-2 teeth of the timing belt

unfortunately carburetor capacity

So, it is on the distribution pulley, but it needs to be combined with something ... right? For the motor to work, right?)))


with the protrusion on the rear cover of the timing mechanism, it is combined

as far as I remember, the mark should be on the generator drive pulley (the one on the crankshaft)
P.S. never had a problem with it


on the pulley of the generator drive, this is for sixes and uzams
the pp-vases, as it was noticed here, have a point on the gear, which is behind the generator drive pulley
but the problem is the gear is very small
therefore, there is no need to wait for the accuracy, I was mistaken by 1mm, so the flywheel will be 5 degrees
even the RV pulley is even bigger, and still you can't do anything about it

toby, this mark on the gear and the oil pump cover is made just for convenience, so that oooooochen approximately to see if the engine is stuck on the right side)))

Answer: Help to set the TDC

Try this again:
When changing the timing belt, you must first, without removing the old belt, set the engine to the TDC-1 position, so that, if possible, do not knock down the marks at all. If you do everything carefully, then the labels will not scatter - then, by setting new belt, they should not be brought together from the very beginning, but by turning the KV (crankshaft) 2 times, check. NB! The engine can be cranked only by the KV sprocket bolt! The socket head is 19, it is more convenient with a ratchet.
So, VMT-1 can be found in any of 3 ways: 1) Align the notch on the pulley stream (it should look almost vertically up) with the arrow (stamped on the lower belt casing above this pulley and points down).
2) Align the "0" mark on the flywheel with the tooth in the window on the gearbox bell from above.
3) Unscrew the 1st force, take some straight thin metal rod (you can use a long thin screwdriver), lower it into the hole and, resting on the piston and turning the engine, catch the upper lifting point of the piston. This method is good only as a completely reserve one, but it was worth mentioning it in fairness.
In each of these ways, you can check the correctness of the actions performed in the other way.
For any of the three described methods: immediately check the coincidence of the label on the PB sprocket (camshaft). It happens behind the sprocket, then it must be combined precisely with the left upper edge of the gasket valve cover (movement hike). It happens that the label is in front and is marked "OT", it must also be combined with the arrow on the plastic casing in the shape of a crescent, it stands directly behind the PB sprocket and sits on the first two pins of the valve cover. If this RV mark has gone 180 degrees, you need to rotate the RV by another 1 revolution, then all marks should align with their marks (or be close to it). Position intermediate shaft it is important only for the correct setting of the initial ignition timing.
Next, we remove the KV pulley, on which 4 bolts were already loosened from the very beginning when the engine was locked, the lower belt casing too (for this, you must also first pull off the pump pulley, and its bolts can be loosened if you first tighten the belt at the very beginning of work generator and stop the engine - that's all you need to start with). After the 3 bolts of the pump pulley have been pulled off, the alternator belt is loose and removed completely.

Release the tensioner roller, remove it from the stud (it must be replaced at the same time as the belt) carefully pull the old belt, change the roller, put on a new belt, tighten so that in the area between the PB sprockets and the intermediate shaft (approximately opposite the roller) it (belt) STILL could be twisted no more than 90 degrees by applying some force of the thumb and forefinger.
Keeping the position of the KV in the TDC-1, you check the PB mark, if it slightly does not coincide, the donkey *** eat the roller and rearrange the belt, avoiding its sagging between the stars of the PB and the industrial shaft, as well as the KV and the industrial shaft. You tighten it again, turn the KV bolt 2 turns, check the marks again, everything should be perfect now.
But it happens that when the mark on the KV sprocket is set, it can be set on the PB only by aligning half a tooth to the right or left. It's not scary, only in the end the car can be a little dull. If this happened, it is necessary, having set the KB mark, rearrange the belt on the PB by 1 tooth to the other side of the mark, i.e. as a result, it will move half a tooth to the other side.

INSTALLING THE PISTON OF THE FIRST CYLINDER IN THE POSITION TDC OF THE COMPRESSION STATE

In order to ensure that the valve timing is not disturbed during the removal of the camshaft drive belt, the piston of the 1st cylinder is set to the TDC position (top dead center) of the compression stroke. If the valve timing is violated, the engine will not work normally.

Set the TDC according to the mark on the camshaft pulley (when installing according to the marks on the flywheel or crankshaft pulley, the piston of either the 1st or 4th cylinder may be in this position). After that, be sure to make sure that the marks on the flywheel or on the crankshaft toothed pulley match (if the alternator drive pulley is removed). If the marks on the flywheel or the crankshaft pulley do not match, then the valve timing is broken (the piston of the 1st cylinder is not set at TDC).

In this case, it is necessary to remove the camshaft drive belt and turn the crankshaft until the marks are aligned.

WARNING

Turn the crankshaft only by the pulley bolt (do not turn the crankshaft by the camshaft pulley).

HELPFUL ADVICE

Since it is inconvenient to turn the crankshaft by the bolt attaching the pulley to it, you can do this in the following ways:

1. Include any gear (preferably IV) and slowly roll the car until the mark on the camshaft pulley coincides with the mark on the rear cover of the camshaft drive belt.

2. Shift into any gear and hang out one of the front wheels. Then turn the suspended wheel until the mark on the camshaft pulley matches the mark on the rear cover of the camshaft drive belt.

TDC marks are applied to the camshaft toothed pulley (protrusion) and on the rear cover of the camshaft drive belt (antenna).

In addition, the markings are on the flywheel (risk) and on the scale back flap clutch housing (triangular cut). For clarity, the gearbox has been removed.

Additionally, marks are applied to the crankshaft toothed pulley (dot) and the oil pump cover (triangle cut).

These marks are visible only when the alternator drive pulley is removed.

You will need: "17" spanner wrench, "10" socket wrench.

1. Disconnect the wire from the negative terminal of the storage battery.

2. Place the gear lever in neutral, place chocks under the car wheels.

3. Remove the right front wheel and the right mudguard in the engine compartment.

4. Open the hood and remove the three screws securing the front camshaft belt cover. Please note: the screws on the side fixing the cover also secure the wire holders. Remove the front cover.

5. Turn the crankshaft by the bolt securing the alternator drive pulley to it until the marks on the camshaft pulley and the rear cover match.

6. Remove the plug from the hole in the clutch housing and check the alignment of the marks on the flywheel.

INSTALLING THE PISTON OF THE FIRST CYLINDER IN THE POSITION TDC OF THE COMPRESSION STATE

The piston of the 1st cylinder is set to the TDC (top dead center) position of the compression stroke so that the valve timing is not disturbed when the camshaft drive belt is removed. If the valve timing is violated, the engine will not work normally.

Set the TDC according to the mark on the camshaft pulley (when installing according to the marks on the crankshaft pulley, the piston of either the 1st or 4th cylinder may be in this position). After that, be sure to make sure that the marks on the crankshaft toothed pulley match (if the generator drive pulley is removed). If the marks do not match, then the valve timing is broken (the piston of the 1st cylinder is not set at TDC).

In this case, it is necessary to remove the camshaft drive belt and turn the crankshaft until the marks are aligned.

Location of timing marks on toothed pulleys camshafts SOHC and DOHC engines are shown in fig. 5.4 and 5.5.

HELPFUL ADVICE

Since it is inconvenient to turn the crankshaft by the bolt attaching the pulley to it, you can do this in one of two ways:

1) include any gear (preferably IV) and slowly drive the car until the marks are aligned;

2) engage any gear, hang out one front wheel and then turn the posted wheel until the marks are aligned.

On a SOHC engine, the mark on the camshaft toothed pulley must align with the mark on the cylinder head. On a DOHC engine, marks 2 (see Fig. 5.5) on the camshaft pulleys must be aligned with the slots 1 on the rear cover of the timing belt.

For both types of engines, the mark on the crankshaft toothed pulley must be aligned with the mark on the cylinder block. It becomes visible after removing the generator drive pulley and the power steering pump. The triangular mark on the toothed pulley should line up with the lug on the oil pump housing. In addition, marks are applied to the edge of the groove of the crankshaft pulley for driving auxiliary units and on the lower front cover of the timing belt (the marks are visible without disassembling the units).

2. Disconnect the wire harness holders from the mounting brackets.

3. Remove the three bolts securing the upper timing belt cover, remove the wiring harness mounting brackets ...

5. Remove the plastic plug from the top of the right engine mudguard.

8. Check the alignment of the marks on the camshaft toothed pulley and on the cylinder head.

All rights to photos and text materials belong to
LLC "Publishing House Third Rome"

And the sprockets of the intake camshafts and exhaust valves engine

The piston of the 1st cylinder is set to the TDC (top dead center) position of the compression stroke so that when carrying out work related to the removal of the timing belt, the valve timing is not disturbed. If the valve timing is violated, the engine will not work normally.

Set the TDC according to the mark on the camshaft toothed pulley (when installed according to the marks on the crankshaft pulley, the piston of either the 1st or 4th cylinder may be in this position). After that, be sure to make sure that the marks on the crankshaft pulley match. If the marks on the crankshaft pulley do not match, then the valve timing is broken (the piston of the 1st cylinder is not set at TDC). In this case, it is necessary to remove the timing belt and turn the crankshaft until the marks are aligned.

4.6. Tags for the correct installation of the relative angular position of the exhaust camshaft and the crankshaft of the engine mod. G4EC: 1 - toothed pulley of the exhaust camshaft drive; 2 - bolt; 3 - intermediate roller; 4 - timing belt; 5 - a mark on the front cover of the cylinder block; 6 - mark on the crankshaft toothed pulley; 7 - toothed pulley of the engine crankshaft; 8 - tension roller bolt; 9 - tension roller spacer; 10 - tension roller spring; eleven - tension roller; 12 - mark on the toothed pulley; 13 - mark on the camshaft support

When installing the piston of the 1st cylinder of the engine mod. G4EC to the TDC position of the compression stroke, mark 6 (Fig.4.6) on the crankshaft toothed pulley should match mark 5 on the front cover of the cylinder block, and mark 12 on the exhaust camshaft pulley should match mark 13 on the camshaft support.

When correct installation the piston of the 1st cylinder to the TDC position of the compression stroke, the marks on the drive sprockets 1 and 2 (Fig. 4.7) of the camshafts should be directed in opposite directions in the horizontal plane.

The engine mod. G4ЕВ when installing the piston of the 1st cylinder in the TDC position of the compression stroke, mark 2 on the crankshaft toothed pulley must coincide with mark 1 on the oil pump housing ...

... and mark 2 on the camshaft pulley must align with mark 1 on the camshaft support.

You will need: socket head "22", knob, key "10".

4. ... and from the side of the air conditioning compressor ...

5. ... remove the bolt and move the knock sensor wiring harness bracket aside.

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