I have a Focus.Timing belt broke,I replaced tappets and followers.The rear cam is belt driven,the front one driven by chain between the cams.I have the tools but need to know how to time the engine.

Kia Rio Timing Belt Replacement 1 6L I4 16 Valve Auto Repair Series

most vehicles have a crank timing mark which sit on the crank pulley,its the big pulley at the bottom of the motor
the cam pulley should also have a mark on the pulley if its belt driven that should line up with a notch on the head or tappet cover
if its chain driven you will need to remove the tappet cover and your cam sprockets will have marks on them that must line up facing each other or facing level with the sides of the head

Pull your Serpentine belt, remove the Cam Belt Cover, (it may be advantageous to remove front wheel in the Cam Belt side) Remove the timing belt and time the engine to specifications, make sure you are on #1TDC, remove the tensioner and replace. if there is and Idler pulley replace that as well. You can use Spray Carb Cleaner to clean the pulleys before replacing the belt. Note, you may have to also remove the Harmonic Balancer and pulleys from the crankshaft.

You need to take off the timing belt (or chain) cover and see why the one camshaft is not turning. Maybe the belt for that cam broke or the cam has seized from a bad cam bearing. One camshaft should be for the intake valves, the other cam is for the exhaust valves.

This unit will be running a timing chain. Now,The 1.6 "diesel" engine has both a belt and chain. In the diesel edition, the belt runs from the crank shaft to the cam and the other cam is ran by the chain.

i an presuming it is a belt driven engine like my 1.6 uk focus, i had the same fault as mine and after extensive investigation i found the cam belt tensioner to be weak and tapping causing cambelt to wear

if this is 6VD1 engine it has single cam gear each head, but is still a 2 cams per head, engine
if belt has broke or you have turned any gear you must remove rocker covers to check positions of camshafts front lobes are in certain spot as well as timming mark on belt driven cam gear to cover
this cam gear is a 3:1 ratio (3 turns of cam gear = 1 turn of cams)

timing belts should be replace at 60,000 miles. ithe focus is a belt

Do you mean the "Timing Belt"? There is NO Cam belt.. .there is, however, a "Cam Timing Chain"... connects the Intake & Exhaust cams together under the cam cover (valve cover). Unless you actually INSPECT the Timing Belt, no one can know... the noise might be anything! Valve tappets, timing belt Idler pully, tensioner pully, water pump bearing, you name it. Solution: Take vehicle into Hyundai Service Center - pay the diagnostic fee - they will give you an estimate of repairs (if needed) (parts, labor, tax, time-frame, etc.). This way you'll know if there's actually a problem and what it is, as well as what's required to fix it... OR that there's nothing at all wrong.

The 1.8T is very common in the US. We don't have any diesels here in the A4, but the 1.8T is all over the place.

What exactly do you need to know? You were posting it in the title to your question but it got cut off and I don't know exactly what you're looking for in terms of info for changing the cam chain. If you mean the timing belt, that's a belt, not a chain. I thought that the 1.8T drove both cams off of the belt, unlike the 2.8, where only the exhaust cams are belt-driven by the timing belt, and the intake cams drive off their respective exhaust cams via a chain and tensioner assembly. If you can clarify this, we can proceed.