I can,t find the timing mark for the left cam closest to the firewall on a 2001 volvo s40 1.9Lt. turbocharged engine

all engines are set on TDC
you did not mention the engine or if it is chain or belt so this is for chain.2.8L
crank key is in line with lh cam shaft center
LH key is vertical
RH key is facing down to the left in the 8o'clock position
for belt drive engines the crankshaft mark is 12 o'clock and both cam shafts are at12 o'clock on the head and two other marks facing2oclock on the lh cam and 10 o'clock on the rh cam
It is complicated to explain but it is in the workshop manual as to how to set it up correctly

the cylinders in the back ( closest to the firewall ) from left to right 1-2-3
in the front ( closest to the radiator ) from left to right 4-5-6. front far right cyl.

Engine number or model. The S80 has a 2.9 (B 9464S) or a 2.8L (B6294 T) Turbocharged engine. Yout VIN number shows it to be a 2001 model (10th digit is the year) 1=2001.

everything is at 12 o'clock. see diagram from autozone.com

remove auxilary belt remove one bolt from timing belt cover remove cover turn engine to tdc using socket on crank nut check cam pulleys lined mark with white paint or tipex remove 4 bolts on crank pulley then centre pulley nut use impact gun prise of pulley check all marks still lined up buy or borrow universal cam sproket lock tool this is important to stop cams moving when belt of release tensioer remove belt chek water pump for leaks and wear fit new tensioner then new belt keep tight on non tension side feed over sprokets tension belt to align pointer on tensioner turn engin 2 times re check timing marks fit all parts removed

IF U BROKE THIS BELT WHILE DRIVING U HAVE BENT THE VALVES IN THE ENGINE, THIS IS WHAT IS CALLED AN INTERFERENCE DESIGN ENGINE, THAT MEANS WHEN THE TIMING BELT BREAKS THE PISTONS HIT THE ENGINES VALVES

both cams should have the marks point to 12 o clock and the crank lines up with mark on the block

The timing marks are just above the cams at the "twelve o'clock position"

If necessary, align the timing marks.
NOTE When aligning the cam pulleys with the seal plate marks, align the left cam pulley “I” mark and the right cam pulley on the “E” mark.

WARNING When aligning the timing marks, do not turn the timing gear counterclockwise. Damage to the engine will occur.

Preparation

Caution! Remove the ignition key.

Remove
the screw holding the engine stabilizer brace to the bracket on the engine
the screws holding the engine stabilizer brace to the suspension turrets
the engine stabilizer brace.

Applies only to B6xx4T engines:
Remove the plastic pipes between the turbocharger (TC) and charge air cooler (CAC) and between the air cleaner (ACL) and turbocharger (TC). Put them to one side. Remove the clamp from the intake manifold for the turbocharger (TC) for cylinders 1, 2 and 3. Turn the upper section of the pipe towards the firewall.

Relieve the load from the belt tensioner.
Remove the auxiliaries belt. See: Drive Belt\Service and Repair
Remove the upper timing belt cover.
Remove the front timing belt cover.
Lift up the servo reservoir and place it on top of the engine.Note! Ensure that the oil does not leak from the ventilation hole in the filler cap.

Seal the hose between the expansion tank and the radiator.
Disconnect the hose at the tank.
Lift up the expansion tank and place it on top of engine.

Raise the car. Remove
the right front wheel
the plastic nuts on the cover in the fender liner. Install the upper timing belt cover.
Turn the crankshaft clockwise until the markings on the crankshaft and camshaft pulleys correspond.
Turn the crankshaft a further 1/4 turn clockwise. Then turn back counter-clockwise until the markings correspond.
Remove the upper timing belt cover.

Remove the 4 vibration damper screws. Counterhold the crankshaft central nut.

Remove
the vibration damper
the auxiliaries belt
the belt cover behind the crankshaft pulley for the auxiliaries belt. Spray universal oil or similar around the rubber sleeve on the underside of the oil pump.

Remove the rubber sleeve.

Removing the timing belt

Slacken off the belt tensioner
Slacken off the center screw for the belt tensioner slightly.
Hold the center screw still.
Turn the tensioner eccentric counter-clockwise using a 6 mm Allen key.
Turn to 10 o'clock.
Unhook and remove the timing belt.Caution! Do not turn the camshafts or the crankshaft when the timing belt has been removed.


Checking the tensioner pulley and idler pulley Check bearing wear:
Spin the idler pulley and listen for noise. If replacing with a new idler pulley, tighten to 24 Nm .
Spin the tension pulley and listen for noise. When replacing, screw the tension pulley into place using the center screw.
Screw in the center screw by hand.
Ensure that the tensioner fork is centered over the cylinder block rib / bracket.
Ensure that the Allen hole on the eccentric is at "10 o'clock".

Installing the timing belt

Install the belt in the following order:
crankshaft
the idler pulley
intake cam
exhaust cam
water pump
tension pulley.Note! The variable valve timing unit on B6304S engines does not have a return spring. The unit is easily dislodged when reinstalling the timing belt.


Tensioning the timing belt

This adjustment is carried out on a cold engine. A suitable temperature is approximately 20°C / 68°F .
At higher temperatures (with the engine at operating temperature or a high outside temperature for example) the indicator is further to the right.
The illustration shows the position of the indicator when aligning the timing belt tensioner at different temperatures.
Carefully turn the crankshaft clockwise until the timing belt is tensioned. The belt must be in tension between the intake camshaft pulley, the idler pulley and the crankshaft.
Hold the belt tensioner center screw secure. Turn the belt tensioner eccentric clockwise until the tensioner indicator passes the marked position. Then turn the eccentric back so that the indicator reaches the marked position in the center of the window.
Hold the eccentric secure. Tighten the center screw to 25 Nm .
Check that the indicator is in the correct position.

Check

Press the belt to check that the indicator on the tensioner moves easily.
Install the upper timing belt cover. Turn the crankshaft 2 turns. Check that the markings on the crankshaft and camshaft pulley correspond.
Check that the indicator on the belt tensioner is within the marked area.

Finishing

Install the auxiliaries belt around the pulley on the crankshaft.
Install
the rubber sleeve on the underside of the oil pump
the vibration damper.
Use new screws.
Tighten to 35 Nm .
Angle-tighten 50°.
Use the crankshaft center nut as a counterhold
the plastic nuts for the cover in the right-hand fender liner
the right front wheel.

Lower the car.
the front timing belt cover. Tension the auxiliaries belt.
the expansion tank
the hose between the expansion tank and the radiator. Remove the lock grip pliers
the servo reservoir
the upper timing belt cover.

Applies only to B6xx4T engines:
Twist the intake pipe for the turbocharger for cylinders 1, 2 and 3 into position.
Tighten the clamp.
Install the plastic hoses between the turbocharger (TC) and the charge air cooler and between the air cleaner (ACL) and the turbocharger (TC). Tighten the hose clamps.

the engine stabilizer brace. Tighten to 50 Nm
the screw holding the engine stabilizer brace to the bracket on the engine. Tighten to 80 Nm .

Final check
Check and top up if required
coolant level
the servo fluid level. Test drive the engine.

Don't forget to rate the solution

thanks
good luck

There should be a mark on both the cam gears, and a mark on the crankshaft gear. There are some important steps when you replace the belt on this car. If you make a mistake, you will cause engine damage so make sure you get the information before you do the job. I recommend replacing the tensioner when you replace the belt too. Look for tutorials on some of the Volvo forums.

Bret
RepairPal.com