There are no marks as such cam and crank are locked with pins. Cam you will see the 8mm hole in cam and head. Crank is locked via a hole behind the starter and difficult to see.

I got a tip off here a good few years ago. A cheap junior hacksaw handle can be easily bent to fit and is just the right size to lock crank

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Ok thanks are these a non destruct engine as lad started van and drove a few yards in first and van cut out wont start and it turns over to easily. Thats why I suspect belt snapped but he said no bang just cut out and its only got 50k miles

 

Normally they break rockers (designed weak spot) before they bend valves. Most people check and replace rockers as needed then fit a belt and see how it runs before stripping head to check valves.

A few people also skip the rocker check a just fit a belt however in the few I have looked at everyone I have seen as had a broken rocker or two

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Can u change rockers without taking cams out on this engine 2.0 blue hdi euro 6

 

No you need to lift cams and carrier

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So I can lift cams without disturbing timing belt and change all the rockers if needed

 

Just took timing cover off and belt is nice and tight and looks really good condition

 

Check the belt has all its teeth by turning it over and checking the belts turns correctly. then try priming the fuel system. Do you have access to a code reader

 

I have a snap on ultra 17.2 but it won't read my 16 plate can cause its got the euro 6 engine scanner only goes to euro 5 unless I can find another model that uses that engine in an older car

 

Took rocker off no belt missing teeth chain good can broke rockers cause no compression

 

Its rare for a broken rocker to cause no compression. I have only known of one case where the broken rocker was jamming the valve. You could try the 2.0 163 or similar engine as that used a Delphi DCM3.5 ECU and yours uses DCM6.2 so the live data may be the same

 

Strange ive got no compression on any cylinder it seems belt looks good cams look good all turning no water in oil rads are full so if head gasket gone it would still have compression in some cylinders could a blocked egr or anything else cause compression problem

 

What car would use that 2.0 163

 

DS4, DS5, 508 and expert vans that i know of maybe more I RHH & RHR engine both use the DCM 3.5

 

Which hole is for the timing

 

You need to line the cranckshaft up also. Then you will know which one it is

 

The larger oval one near the cut out if I remember correctly. You will see only one lines up with the hole in the head

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I have no compression o engine just took intercooler off and its dripping with oil can a blown turbo cause no compression

 

I have no compression o engine just took intercooler off and its dripping with oil can a blown turbo cause no compression

How did you measure compression?
If yo mean lack off power. Then yes. If the turbo goes then getting from 0-60 wil take a week

 

No wont start i crank it over and its like there's no glow plugs in

 

Dont worry about glowplugs. It will fire even with all four being bad.
What have you been working on?
If a diesel dont start it is always fuel related.

 

How bad was the oil, a slight amount of oil is normal due to breather system. If load of oil what is the tailpipe like any oil dripping?

Is there any noise like chuffing from round the injectors it could be they have been removed to fault find and not refitted correctly which could be compression leak.

Can you feel compression on any cylinders if you turn the engine over by hand

 

Oil was about a cap full no oil round pipe it has compression just nowhere near what it should have

 

Oil sound about normal. So no runaway and melted engine parts based on that amount and clean tailpipe.

Any luck with live data readings as you need cam/crank sync, 250+ Bar fuel pressure and normally around 120 RPM to start.

Even if compression is a bit low it should show signs of firing.

Worst case for live data if you have a android phone get fap lite and a cheap Bluetooth obd2 elm327 dongle and that should give you basic live data

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Waiting for my new maxipro 808 scanner to arrive and I'm going to try a compression test and it showed no signs of trying to start ive done alot of engines to know something isn't right was hoping belt was snapped or crank so I'd no but its starting to baffle me as your right if 1 piston valve headgasket gone it would still start and sound rough new engines are getting harder to diagnose

 

Done compression tests 1st cylinder to 4th all over 100psi 170psi 0psi 170psi any ideas

 

Any improvement on the 0psi with a squirt of oil in the cylinder and any obvious leaks around injector.

How new did the belt look when you checked it. Could the previous owner have fitted a new belt after it snapped and could not get it run due to bent valve or damaged lifter and therefore just sold it on.

I cannot remember what engine it was, but I can recall someone with a non starter after belt issue and the woodruff key on one of the cam pulleys had sheared when the belt/chain failed and the cam turned in the pulley so it was not timing up correctly

 

Belt looks not new but ok and cams are turning how can 2 cylinders b down opposite rules out head gasket 1 and 3 cylinder down if one was down id say dropped valve but 2 not next to each other ? Timing can't b out or all would b out 2 and 4 are both 170 psi unless that is also low