Generally the codes received are result of an elongated/stretched chain if the camshaft sensors and speed sensor are OK. Measuring group 93 will tell the story. In my case could clear the codes and they would come back pretty much after a few minutes of running. At your mileage would bet it is upper timing chain, but not a certainty.Hi benb2376, thanks for reply,...
I have arround 240000-280000. But is car from second-hand this is why "arround".
I use VCDS (china cable, but work )
Yes try to measure this blocks in group 93 and I'll get back with measurements.
Did they replace the sprockets on the camshafts or the two at the oil pump? Glad to see you got squared away. I still haven't done mine. Have clear rattle but goes away completely when oil temp gets to about 150F. Winter performance is not great until car warms up, no issue when warm. Will probably get fixed in spring.I got my car back from the mechanic yesterday after getting the timing chain, guides and 2 sprockets replaced.
Result : better idle, smoother power delivery (especially mid-range), no chain rattle, No fault code.
MEASURE BLOCKS GROUP 93 :
Old values : - 5 deg , - 10 deg
New values : -2 deg, - 6 deg
Specification : (+/- 8 deg)
Does anyone else have timing values after the chain has been replaced?
Should it be closer to 0 deg. ?
Only the 2 intermediate sprockets as these has "new" metal worn away. I'll invest in a magnetic drain plug now.Did they replace the sprockets on the camshafts or the two at the oil pump? Glad to see you got squared away. I still haven't done mine. Have clear rattle but goes away completely when oil temp gets to about 150F. Winter performance is not great until car warms up, no issue when warm. Will probably get fixed in spring.
I don't know about the 4.2.I measure on cold engine and first picture is my values, on second picture is values my frend Treg 4.2 (he have more bad values than me? or 4.2 have other group for measure?) I forgotten to write, start (cold or warm) is OK when is timing on engine bad that could be problem sometimes with start engine no? And engine light (error light) is show after 4-5 starts, I think no matter how far I drive.
Pretty certain you need to replace the upper chain. The camshaft sensors only tell the ECU the position of the camshafts. Can't compare 4.2 values with the 3.2. I believe the v8 uses a belt vs chain for timing. My chain only makes noise ( sounds like marbles rolling around in a can). When car is not at operating temperature at idle and accelerating. On the back of the block there is a centrifuge that turns oil vapor back to oil drops. The camshaft chain is directly below. Take a long screwdriver hold against the centrifuge and put your ear to the handle, or if you have a stethoscope. If you can't hear now or only slightly it will get worse with time.thanks benb2376 for help.
That is for sure bad timing chain? Or is more measurements what I can try for sure that is not just bad sensor?
Great slides. Since you have the engine out have you considered replacing the camshaft adjusters? It makes sense with the engine out to replace both upper and lower chain, but is it necessary to do both to correct the timing issue? Generally VW will replace everything and hit you up for new adjusters , too, but their TB on the issue indicates replace upper chain vs everything on the tail end.Hi
I have put together some photos of the timing chain replacement. There's 10 slides.