vtraudt

I need to change the cam seals, tensioner seal and the 'plugs'.

I have the chain tensioner tool compressed, tensioner bolts removed. How do I get the tensioner out?

What else needs to be taken off? to get to the cam chain tensioner seal?

Next I am pulling the cam tooth belt sprockets off (crank is locked, cam lock tool was on, positions marked, ditto chain just in case).

I read somewhere the cams have to be taken out together at the same time. Why?

vtraudt

Oil leak - seals?
I replaced the crank ventilation hoses and valves (the 'pump' was clogged, hoses briddle); I am sure this contributed to the oil leak (oil dripping onto exhaust on both sides).
I have the valve covers off, timing belts etc off.
I have a complete gasket/seal kit on hand.

Now the question: what seals should I change:
- the front cam shaft look dry.
- hard to tell about the rear seals
- ditto cam chain tensioner seal (passenger side tensioner currently compressed)
- rear 'plugs' (read they also have a tendency to leak).

Should I change the cam seals, even so the front look dry?
What about the cam chain tensioner seal? How do I get to it? The tensioner is compressed, bolts removed, is loose. But can't figure out how to get it out from under the chain?
Really would like to change the rear seals and chain tensioner.

Will NOT change the front crankshaft seal.

Car is 1999 A6 2.8l 30V, 100k miles.

Links for how to's needed, particularly chain tensioner, rear seals, cam removal (if needed to get the tensioner out), rear cam seals.

Any tips and suggestions.
Need to get it done asap.

Thanks.