Timing question

[bagpype]

I had what I thought/ hoped was a blown head gasket on a 2004 A4 1.8t 6speed manual I recently bought. Before taking the head off I put marks on my belt and pulleys in two places after setting the engine to TDC. After taking the head to be pressure tested it was discovered that it had cracks in 3 of the 4 cylinders. I bought a remanufactured head and the machine shop told me that the head was set to #1 TDC. I installed the head and now my marks on the cam pulley and timing belt are off by 1 tooth. I have attached pics of the cams, the head, and the cam pulley with belt. What should I do to correct this? Does it need to be corrected?

[old guy]

Start by making sure your crank is at TDC. Next align your cam sprocket to TDC and install the timing belt. Then you align the intake cam with the exhaust cam by putting 16 links between the cam notches. I can't see your crank marking so I have no way of knowing if it is correct. It appears to me that you are trying to work from the cam to the crank instead of vice versa.

[chad99]

The belt could have slipped a tooth off the crank when you removed the head, no big deal, just make sure belt is seated good around crank.

If you have the crank at TDC, 16 links between camshafts and cam gear lined up with the valve cover mark, and you can get all the marks to line up after two complete crankshaft TDC cycles timing should be fine

[BEASTINB6A4]

Good luck! , if the cylinder head timing is off a tooth as pictured above can this cause a P0010 - "A" Camshaft Position Actuator Circuit (Bank 1)??

[customa4]

If the timing is off, no, that code would not show up. That code pertains to a fault with something electrical which is why there is "actuator circuit" in the description.

[bagpype]

Thanks for all the replies. I am going to have a go at it today and will report back with the progress.

[MacFady]

When you do report back, post pics of each cam at the chain and one showing both to confirm the links.

[walky_talky20]

Yes. You need 3 pictures total. Like this (example of correctly timed 1.8T):

[bagpype]

Well it turns out that the timing was only slightly off at the head. I set both crank and cam timing to TDC and it is good. Now theres another giant problem, I think the turbo might be bad. But thats a story for another thread.

[walky_talky20]

"Slightly off" isn't really a thing (on a 1.8T). It is either off a tooth or more on the chain (or belt), or it's set correctly. The V6's have fully adjustable cam gears, so those can indeed be "slightly off".

Hopefully you got it on the money. Good luck with the turbo.