Hello Esmeralda, you have not posted for a long time ...
the answer to your question has its history, because everything depends on the engine we are talking about, for example:
first variable:
Motors 4EC1 1.5D, T4EC1 1.5TD 4EE1 1.7D and T4EE1 1.7TD of Isuzu.
(The Ópel mounts in the Corsa, Astra, Combo, Vectra until
96 and Corsa until the 00)
These engines have three brands in moving parts (crankshaft, injection pump and camshaft). The marks are, in the crankshaft, the brand is on the outer pulley, (the alternator, water pump, etc.) exactly the same as if it were the ignition point mark of a gasoline.
In the pump pulley there is an 8mm diameter hole and in the pump support there is a thread of m8x125, you just have to put a screw and apart from putting it up, the blocks so that it does not turn.
In the camshaft pulley you have exactly the same, 8mm hole and thread of M8x125.
These engines are a blessing of God because you change the distribution or do the cylinder head in a pis pas.
Second Variable:
XU9D 1.9D, Xu9dte 1.9TD, PSA
(the Citroën, Peugeot Fiat, in the C-15, ZX, Peugeot 205, 306, 405 ...)
These engines carry a tranco in the crankshaft, that is, a pin that is inserted under the starter engine in this specific case and that enters a needle Of inertia, all this is hidden so you will not find marks in the crankshaft pulley or in the gearbox.
In the injection pump pulley they carry the same as the others, 8mm hole and M8X125 thread.
And in the camshaft pulley they carry another 8mm hole and another thread in the M8x125 butt.
These engines if you know where the \ "tickles are done quite well too.
Third variable:
F8Q 1.9D engine, F8M 1.9D of Renault.
The ancient Kangoo, the Clio, the Express, R-9, R-11 ...
These engines do not have fixed marks, they only have marks in the pulleys, such as the old belt is in contact with both sides with the rollers it turns out that the white stripes it has, end up erase and stay with a stupid face trying to look where the fixed marks go in the distribution.
Answer has no fixed marks, only mobile marks on the pulleys and in the distribution strap.
So when you put the strap, you look at the meaning, you are looking for the mark in the crankshaft, you face the Correa brand, you go to the pump, you look at the mark on the pump pulley, you face it with the brand of the belt, and go to the camshaft, where you repeat the operation, you face the shock of the camshaft with the stripe of the distribution strap.
In these engines if you don't screw it around the belt, the rest is Chupao.
Fourth Variable:
HDI Motors of PSA
Motor DW-10, Mounted Citroën in the Xsara, Xantia, Berlingo until 2003, Peugeot 206, 306, 406 ...
These engines carry a tranco in the crankshaft, just like the Xud9 and Xud9dte, (in fact it is the same useful).
If you add to this that the high pressure generator does not have a draft \ "ohh that of a bitch
! idea).
The fact is that if you spend tense it is advanced and if you leave it loose apart from being dangerous, the injection point is delayed, because in the camshaft it carries the phase collector that detects in what position is the cylinder 1 at all times.
On the other hand, in this engine there is a pin that gets into the fixed part of the camshaft belt and coincides with a drill in the butt. So with mischief and practice you can change the distribution strap without the user (which is certainly expensive that you shit). Once you are placed, the pins must enter and leave without problems, both the crankshaft and the camshaft.
Fifth variable:
Motors with chain distribution
These engines, as they carry the chain distribution, usually have trancos in the crankshaft and the issue of the injection pump usually peeled by means of a watch comparator, the clock comparator literally gets in the ass to the pump (yes it sounds bad but so at least it is not a monoton command with the comparator's stick.
With the piston No. 1 in PMS (of course the tranco is involved) you must turn the pump until the comparator marks what the manufacturer indicates (exection, in the 2.0 dtl and 2.0 dth engine, the comparator must measure 0.60mm).
Once you have pump the pump, touch the camshaft, sometimes there are holes where you can stop it as in the case of Isuzu but others as in the case of 2.0 dtl and dth, you have to put the comparator again, this time on the intake valve of the cylinder 2 or 3 or I no longer remember, it is a fucking
motion by hand wishing not to touch any valve and that the bomb and tree pulley screws are well tight before starting. Because the axes do not carry clamps.
Now is when one remembers how well the distributions of the ancient Isuzu are made ... Jaajajaja.
Always, whatever the engine, diesel or gasoline, before starting, turn the crankshaft two turns in its direction with the hand to avoid possible damage in case you have not properly penetrated the distribution.
If a valve touches on a piston when you turn by hand, it makes Toc! And one says \ "shit \" and plays again disassemble and peel again, peeeero (there is always a but) if you turn happily with the start and this happens, the TOC sounds stronger, and one does not say shit, shouts I shout in ... !! Because the valve has been folded and touched by the straw.
Once we have managed to start the engine, in case it is diesel with normal injection pump (no HDI) we will wait for it to heat and by the color of the smoke when accelerating we will detect whether or not the pump is about.
If bluish white smoke comes out when accelerating with the hot engine and assuming that the injectors are fine (for example, if before touching anything of distribution it did not) it means that the pump is back of point. In addition, when carrying the engine to the injection cut, explosions will sound for escape.
If on the contrary the engine sounds weird, as if it were hard, it pulls black smoke, and when accelerating it sounds as if they put an ether by admission, it means that the pump is excessively advanced. If this happens to you, it is important to stop the engine as soon as possible because it can pee by accelerating it.
I hope I have clarified the doubts if you have not died when reading this.