fine starting from cold but struggle to start from hot

[scirocc0]

after replacing injector seals , turbo and big end bearings , it will only start fine when from cold , when it warms up it will either rev up and down slightly or rev up then just cut out , no fault codes have come up at all.
all i know is that there is a slight oil leak from the back of the rocker cover / cam carrier cover,

its a 16 valve dv6 engine

it ran fine when i changed the turbo , then i changed the big end bearings and injector seals now its been a problem since

you tube video here of the car trying to start from hot , usualy takes 3-4 times or more to start it , always sounds a mess when trying to turn it over

video VVV

[spider]

Odd. I'd expect a code ie fuel pressure or temp if there was some issue.

When I saw the topic title I thought of valve clearances actually, I'm not familiar with this unit though. Are they hydraulic tappets ? (having said that a faulty hyd tappet is rare but not impossible) , I wonder if its possible to measure the clearance in some way without dismantling...

[steve18gls]

Camshaft or crankshaft sensor faulty !

[citronut]

lots of smoke from under the bonnet,are you sure the injector seals are sealing properly, or the injectors are tightened down enough,

the other thought is maybe you have left a plug of something?????,

another thought does one injector have a sensor attached and its fitted in the wrong place/cylinder

[BX]

Never clean the injector nozzles with a wire brush. You didn't do it did you?

[scirocc0]

Hi, thanks for the replies. no I didn't clean injector nozzles with wire, but i did with a rag, everything is definitely plugged in,
If it was sensors or injectors , I thought it wouldn't allow it to start at all

valve clearances is my main thought on it, as it is leaking oil from the back of the rocker/cam carrier which I'm guessing it means it could be slightly unlevel as i did take it off to clean the cams, what kind of pattern should I bolt it on to make sure it goes on level . It sounds fine when I rev it up though. But I'm gonna have to take it apart again anyway so fingers crossed its because I didn't bolt it back down level. There doesn't seem to be gaskets for the rocker/cam carrier so I'm guessing it doesn't need one

[BX]

Not sure about the rag but many old time diesel fitters have been caught out wire brushing the injectors on modern Cr engines. The wire brush was great on the older injector but causes all sorts of running problems on modern ones. I wouldn't clean the nozzle at all. I don't think that the cam box could be out enough to cause a problem.
Where you do not know the recommended tightening sequence start in the middle and work out in a spiral. Another pattern is
9. 1. 5. 3. 7
8. 4. 2. 6 10.
Or adapt either to the bolt pattern on the machine you are working on.

[citronut]

it does depend which plugs might not be plugged in or not quite in fully to if it will stop it starting from hot/cold,

are the cams clamped down by the cam cover on this engine then??????,

if they are not then there ius no reason why the clearances should have altered,

i fitted a cover seal to my daughters XUD 1.9 TD Synergie some time back, after which it acquired a serious oil leak,
on checking it the seal must have dropped off the edge of the cover a slight bit at the rear,

as you can't get your fingers or see down the back of the cam cover,

obviously the short part of the seal that had moved out of place got squished between the cover and head causing it to leak

[scirocc0]

The cam shafts aren't attached to the cylinder head, they are fixed in the rocker cover so I can see why it would mess it up if it wasn't bolted down properly, so it could warp from the heat and mess timing up

[citronut]

ok but do the cover bolts hold the can carrier down then?????

[scirocc0]

Yeah bolted down by all the small bolts here is an example photo i found of what im talking about , in the photo it is upside down

http://www.cartorquenortheast.co.uk/wp- ... G_6553.jpg" onclick="window.open(this.href);return false;

[scirocc0]

Thanks for the help anyway , tomorrow ill have time to remove and the cams and refit them and double check ive tightened them down correctly and ill post my results, fingers crossed ill sort it out