QuestionQUESTION: Ray, I have read and appreciate what you said in http://en.allexperts.com/q/Volvo-802/2008/8/S80-timing-belt-replacement-1.htm
but I have already seemed to mess up the timing and possibly the valves, which remains to be seen.
in the above website it is written: 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"
My question is twofold, first what do you do when it becomes dislodged, or how to fix it.
Second, you said you had pics available, could I receive them?
Now my history, I am working on the boss's 2000 s80 t6, 2.8L twin turbo, w/ vvt. The flywheel was eaten up so I pulled the cradle/engine/trans and replaced it, then before re-installing I decided this was a great time to do the timing belt, as he did not know how long ago it was done, having only had the 280 less than a year. So I did the timing belt. I had not read your article until after the fact. But I marked all the pulleys and cogs and replaced them exactly as found (or so I thought), not turning the crank or cams, except that the exhaust cam turned on its own about 3 cogs clockwise I think, and I turned it back to the original position, then reinstalled the belt, and then the cradle. Now, I have fire and fuel, but no compression. The compression is between 25 and 60 on all cylinders. I assume that the exhaust cam is off b/c it was the only one that moved on its own. Can you help? Thanks. Brad Owen, Greensboro, NC
ANSWER: Brad,
If the VVT is not set at the very beginning there is trouble. You will have to take apart the rear of the engine get the special tools to line up the cams to TDC so the gears can be put on. The VVT will have to be reset to it's proper setting and put back on. If you are not sure about the valves you will have to retime the complete engine and then do a compression test. If the valves are bent you need to remove the head for repair. Check with you areas local parts stores, some have the ability to print work procedures from All-Data/Mitchell-On-Demand. If you have a fax or e-mail I might be able to send some procedures to help.
Conversion Calculator
2000 Volvo S80 T6 L6-2.8L Turbo VIN 90 B6284T
Vehicle Level Engine, Cooling and Exhaust Engine Timing Belt Service and Repair
Service and Repair
Notes
REPLACING THE TIMING BELT
Special tools: 999 5433
999 5456
Removing the timing belt
Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.
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.
---------- FOLLOW-UP ----------
QUESTION: Your answer was as expected, and I will begin the process of taking down the rear of the engine. Thank you for your help. I had already read the procedure for replacing the timing belt and I appreciate the repeat, as I'll print it out this time.
You mentioned "If you have a fax or e-mail I might be able to send some procedures to help. Conversion Calculator". If it is not too much trouble, would you send this. My fax number is 336.297.5035, and my email is bcon415@yahoo.com. Anything, anyhelp would be appreciated. I will begin calling around to find "All-Data/Mitchell-On-Demand" and see what is available.
Again, thanks for the help.
ANSWER: Brad,
I had to fax the info I could not make it as an attachement. Maybe too large a file
---------- FOLLOW-UP ----------
QUESTION: Ray, Maybe I can get by with one more question, because you have help me so much, and I appreciate it.
Is it possible for the timing and thus the compression to have become that far off by not holding the exhaust cam? I was so very careful to not let anything move, and the exhaust cam moved, so I carefully turned it back to the original position, w/o recognizing that it had VVT.
I guess my next problem is how to get this to the volvo dealer because the only tool is from Volvo, and paying 270 for the tool for a one time use is rather extravagant. But paying them 800 to do the timing belt is also bad idea but less headache.
Brad
AnswerBrad,
Well if the belt was removed BEFORE the engine was set to TDC using the "going passed the TDC mark 90' and them moving it back, the VVT is not set. That might might make it off enough to affect compression. At this point you are still not sure of bent valves, so might be the right time to allow the dealer to look at this before MAJOR damage is done. Did I send you the set up for the VVT? And yes the tools are a cost factor, and needed to fix it the right way.
