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Timing

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The best or easiest way to set the timing on 2.0 tdci. Apparently its out of time do I just take the belt off and line the holes up I've seen something about exhaust cycle and compression cycle don't know if there to do with my engine or not the car don't start and a mechanic says he thinks someone has tried putting a cam belt on and it's 180 degrees out or something said its an easy mistake to make but it's backwards instead of it sucking intake its blowing out how or what would I do to set the timing correctly thanks for any help on this matter 



Depends on the exact engine but this is a starting point (many other videos likely?):

 

  • Author

That's the one I've been looking at but he's just locking the engine up when the timing is already set.i been told my timing is 180 degrees out and don't know were the hell to start with this tdc and compression cycle 

  • Author

Oh and my engine is like that one in the video.

A least you're on the right engine.

If I have this correct (wait for confirmation)) you should, as said, lock the crankshaft and then locate the other locking pin/bolt in the camshaft pulley (obviously must find the correct holes to use) then fit the belt (using Alan's point on ensuring that the crank toothed pulley is pushed in the correct direction before tensioning?)

Then turn the engine over two complete revolutions to ensure a) no contact between valves and pistons b) you come back to the point where both the pins slide in without any force.

I don't see how, if that is done, the timing can be 180 degrees out as valves and pistons are correctly timed and crank and cam sensors decide the injection (unlike the olden days where it was done mechanically)

the two camshafts are driven by a chain that needs correct timing (marked links and dots on the camshaft?

If that doesn't make sense, what is the history, how has this come about?

One point may be to check if you can fit the timing pins before going any further and firstly read any codes with Forscan?

Comments anyone?

The crankshaft to camshaft ratio of every four stroke engine is 2:1. Every rotation (360 degrees) of the crankshaft equals half a rotation (180 degrees) of the camshafts.


The camshaft position sensors are used for the timing of the fuel injection system. The crankshaft position sensor is only used to detect engine cranking, measure engine RPM and to check for the correct timing between the crankshaft and crankshaft.


You can rotate the camshafts half a rotation (180 degrees) with the timing belt removed but since the crankshaft to camshaft ratio is 2:1 this will not change a thing since the camshafts will be in the exact same position in relation to the crankshaft as they were before.

Another problem is that on this type of interference engine it is not possible to rotate the camshafts with the timing belt removed without interference between at least some of the valves and the pistons. The camshafts need to be physically removed and installed 180 degrees rotated to make this even possible. 

Even if it would have mattered it is physically impossible to just rotate the camshafts 180 degrees during a timing belt change. This at least requires disassembly of both camshafts.

  • Author

I don't have a clue how this happened I bought a car non starter a guy was walking by me and said he was a mechanic for 30 year and had a look and said its got blow back instead of sucking its blowing and he's theory was someone tried fitting a cambelt and said its 180 out as its an easy mistake to make and if the timing was set properly it would start but how about if I lock the camshaft take the belt off and turn the crank 360 degrees to hole and put the pin in the crank and put the belt on would that 360 turn fix the 180 degree out?

You cannot rotate the crankshaft 360 degrees while the camshafts are locked. While doing that the pistons will hit the valves.

Rotating the crankshaft by 360 degrees without the timing belt fitted can only be done when both camshafts are removed.

But as I already said that will not change anything. It has the exact same effect as rotating the crankshaft with the timing belt in place since there is a fixed 2:1 ratio between the crankshaft and the camshafts.


I suspect a completely different problem. Are there any DTC codes stored? 

Since you bought it as a non-runner it is not unlikely that there is a serious problem, and the previous owner got rid of it for a reason. 

  • Author

There's no codes 

  • Author

This guy said the timing has been set backwards whatever that means and it's doing the opposite of what it's meant 

  • Author

I was told needed a fuel pump but replaced the fuel pump no start tried easy start and no start.but my theory was maybe the fuel pump locked and in turn stripped teeth off the cambelt or made it jump teeth.but havnt inspected the belt fully as of yet.then I thought maybe they have tried fitting a belt and took cylinder 4 as cylinder 1 and set the timing from cylinder 4 but then surely the valves would of came into contact with the piston I havnt got a clue

5 minutes ago, jamesymc216 said:

There's no codes 

It looks like @JW1982 is thinking the same as me in that the off the cuff diagnosis of "180 degrees out" isn't possible ?
If this has never run whist in your possession and you don't know the history, it's really back to basics rather than going down the rabbit hole of only thinking about timing.
If it cranks but won't start my thoughts are still that there must be some codes or you need to look at Forscan (cheap OBD readers don't find Ford specific codes) live data PIDs to check, for example crank.cam correlation, fuel rail pressure etc - something to say it has fuel - injectors may not turn on unless cranking is good and crank and cam are synchronised etc.
A compression test may be necessary as well as the spluttering (which I don't understand) needs to be confirmed (this can be done using a current clamp on the battery lead  and checked against a known good.
Likewise, correlation can be checked without dismantling but you need someone who has the gear and  knows what they are doing.

I haven't read the two most recent replies but unless you are prepared to do some time taking dismantling and check the timing yourself (after looking at the simple stuff) you may need to get someone to diagnose it correctly.

Sorry, it sounds like you are out of your depth and need to be very careful how you proceed?
You appear to be given guesses by random passers by rahter than any diagnostic testing (Test don't guess!)

If you have changed the fuel pump (history you haven't given us - what else is missing from what YOU know and we don't?)

I recall that Alan states that the fuel pump needs "timing" (dots on the gear(s)?) - not directly stopping operation but to protect the pump pulsations from damaging something else IIRC.
As you say, I believe cylinder 1 is next to the flywheel but, as said if you lock the crankshaft and the camshaft with the pins it all lines up unless something else has been changed, damaged or done incorrectly of there's history we don't know.
If it doesn't start with Easy Star then it's definitely back to basics IMHO.
 

  • Author

We were going to put another engine in it we don't any previous of the car or what was done to it.only thing the lady said to me was it was driving perfect and then cut out said it had been diagnosed with needing a fuel pump.she then said a mobile mechanic had either fitted a oil pump or diesel pump and when we took the diesel pump out it was seizing and when it's turned over exhaust fumes are coming out the intake this guy says its got blowback and thinks someone tried replacing a cambelt and done it wrong 

With that history, a timing check sounds necessary in the first instance but as no one knows the history or which pump was changed - oil pump is in the sump and would have been much more serious?)
If it won't start on Easy Start it looks like it could be way out (again, no history)
If you can't confirm decent compression diagnostically/electrically then the timing check is the "easiest" way to go - only you can decide as I'm feeling very uncertain as I'm not there?

Edit, explanation of timing chain and belt setting?
https://www.youtube.com/watch?v=ewV0i9MqMb8

Edit 2: This is Mk V but likley relevant?:
https://www.youtube.com/watch?v=toKv2yUoU6Y

Edit 3: Still suggest there must be codes...

 

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