[festa]

That will be why I can't get it then 😂 I'll have annother look tomorrow!

In the book it just talks about starting at the 12 o'clock position and having a force of 0.5nm anticlockwise on the two prongs.
I take it the mark on the eccentric pin can be anywhere then so long as the mark on the cam is aligned ?

Yes ....you start at 12 and work around to 9. The mark on the camgear should move closer to the head, but it depends on where the mark on the camgear starts from.

 

[Curtis1222]

Hey bud have you used the correct timing tools make the crank is locked up in the correct place then lock the cam up then check the cam sensor plate if it still out then u can loosen the top gear and move it to locate flat against the head iv done a few of these camshaft replacement

Yeah using the tools for this engine to lock cam and crank, still no joy.

Another update, checked the wiring from the cam sensor to the ecu and that all appears to be healthy.

The only way I can get the cam gear timing mark to line up is by going anti-clockwise to the 3 o’clock position with the eccentric gear but then the gears don’t mesh properly. Really don’t understand how I can get the half tooth.

I was hoping to scope the cam and crank with VCDS but I don’t believe this is possible.

 

[Dl autos]

Yeah using the tools for this engine to lock cam and crank, still no joy.

Another update, checked the wiring from the cam sensor to the ecu and that all appears to be healthy.

The only way I can get the cam gear timing mark to line up is by going anti-clockwise to the 3 o’clock position with the eccentric gear but then the gears don’t mesh properly. Really don’t understand how I can get the half tooth.

I was hoping to scope the cam and crank with VCDS but I don’t believe this is possible.

Yeah using the tools for this engine to lock cam and crank, still no joy.

Another update, checked the wiring from the cam sensor to the ecu and that all appears to be healthy.

The only way I can get the cam gear timing mark to line up is by going anti-clockwise to the 3 o’clock position with the eccentric gear but then the gears don’t mesh properly. Really don’t understand how I can get the half tooth.

I was hoping to scope the cam and crank with VCDS but I don’t believe this is possible.

 

[Dl autos]

 

[john eng]

Hi All, Finally found my problem of having the cam gear half a tooth out from the mark.five cylinder 2.5 BNZ ...drum roll..you need to line up the gear train with the crank at TDC ,lock the crank into the block, fit the head mashing the intermediate using a eccentric shaft then line the cam gear with the top on the head lock the cam shaft then bolt the cam onto the camshaft, remove all the locks turn the engine over twice to check

 

[Curtis1222]

Hi All, Finally found my problem of having the cam gear half a tooth out from the mark.five cylinder 2.5 BNZ ...drum roll..you need to line up the gear train with the crank at TDC ,lock the crank into the block, fit the head mashing the intermediate using a eccentric shaft then line the cam gear with the top on the head lock the cam shaft then bolt the cam onto the camshaft, remove all the locks turn the engine over twice to check

Glad to see you've made some progress, I don't understand what you mean by mashing the intermediate ?

 

[Dl autos]

Did the picture help at all mate

 

[Curtis1222]

Did the picture help at all mate

I've got the autodata sheet, thanks though!

 

[DonnyG]

if its any help i've attached the VW procedure from elsawin

 

[gtijames]

That's a really useful pdf thanks, I'll keep that just incase [emoji106]

Sent from my SM-A505FN using Tapatalk

 

[Curtis1222]

Well just another update I've had a chance to scope the cam and crank sensors and it proves 2 things.

1) the both sensors are working fine.

2) the timing is still out, from what I've read elsewhere the first cam pulse should be on the 7th down peak after reference where as mine was 8.5. I then moved the cam gear 1 tooth which then made it just over 5.

Its only a slight bit out but I cannot work out how to adjust it , Any ideas?

 

[T5 TDI]

I've never done this job as I mentioned before so I've never been really hands on with it. I like reading manuals but there is nothing like physically getting in there to understand how it all works! I did spend a good few years in the motor trade before I (happily!) retired and I must have changed plenty of camshafts over the years but this engine is unusual enough to catch out anyone it seems! Does the backlash adjustment provide for the smaller adjustment between teeth I wonder? Nice waveforms by the way.

Are you still getting any correlation/out of range codes? And what does VCDS make of the torsion value now you have it running? Just out of interest see what numbers are in (engine) group 4 field 4 to compare with the 3.4 degrees in my link in post #9.

 

[Curtis1222]

Yeah definitely agree with getting hands on with something! Definitely a s strange setup 😅more in common with a tractor. Would be ideal if the cam wasn’t a common problem be no need to go into the gears then.

Cheers, scope is nice to see what the ECU is getting from the sensors, confirms what I suspected before which is good.

In terms of VCDS, I'm getting an implausible signal code on the cam sensor.
Torsion value is 0 but by all accounts the engine needs to be running for this to show a value. The engine still isn’t running just took the scope while cranking.

Had a look into the torsion value quite interesting I guess it would show you if a belt had stretched on a 1.9 TDI or something.

With the backlash to be honest I'm not quite sure. There's 2 things that are mentioned in the manuals, one is the eccentric pin which seems to adjust the cam gear by a small amount. The other is when you use 2 torque wrenches to "eliminate play in the gear train"

Going to have another look tomorrow, the adjustment has got to be in the eccentric pin but I've just got it in my head that messing with this effects the meshing of the gears. The book only talks about giving it 0.5nm of force anticlockwise and then tightening it. I need to go clockwise to get the cam sprocket to line up with the head properly

Will report back when I’ve done some more 🙃

 

[gtijames]

I'd be going back and following the procedure from the start, you may notice something or do something different. Sometimes you can get fixed on a way and miss the solution.
Sounds like the backlash gear is over adjusted, set the cam gear position then adjust the backlash gear to it if that makes sense

Sent from my SM-A505FN using Tapatalk

 

[festa]

Seen this before ... The marks on the essentric pin needs to be at 12o'clock and move it through to 9 pm, but the cam gear can't be tightened up on the camshaft as it will put the cam lobes themselves in a wrong position.

 

[john eng]

hi not sure if we had the same problem.. mine was half a tooth out of line. ..take a look at my photos in my cam folder on how to set the geartrain in sync with the cam gears.. .

 

[Curtis1222]

hi not sure if we had the same problem.. mine was half a tooth out of line. ..take a look at my photos in my cam folder on how to set the geartrain in sync with the cam gears.. .

John your on to a winner here! just checked mine and its out. Now sure if its 1 or 2 teeth, interestingly it looks like i may have a broken piece where the alignment mark would have been. Take a look at the picture see what you think.

Makes me wonder if its had a recon engine, will see if i can check the engine number.

 

[john eng]

Looks like its one tooth out if the crank is TDC at the other end.

 

[Curtis1222]

Yeah this is what I was thinking, 1 tooth here would equal 1/2 tooth on the cam pulley. Which is what I've got crank is locked the other end. How do you go about adjusting?

 

[john eng]

you need time and patience, {not saying it the best .the only way i could think of} the way i found was to...remove the cam and injectors , bolt on the part that allows you to turn the crank clockwise .22mm spanner .fit the idler gear move the pin from 12 to around 9 o clock to set the backlash , hand tight the capscrew . tipx mark a tooth so you can see how far you have move it , I chopped the end of a old cam to locate the cam gear .. now turn the crank clockwise one turn using the crack in the main bearing as a rough guide to TDC , fit the cam gear you do not need to screw it up,, to see if it lines up...if not remove the cam gear and .. repeat until you find the luck place..lol..only took all morning..