Questionwe did a valve job on a 1999 volvo v70 , and are now geting a code that says exhaust cam is over advancing. what is the procedure for setting up the timing when the cams have been removed. thanks... e.w.rogers
AnswerEW
1999 Volvo V70 L5-2.4L VIN 55 B5254S
Vehicle Level Engine, Cooling and Exhaust Engine Camshaft Gear/Sprocket Service and Repair
Service and Repair
Notes
Replacing camshaft seal. Applies to engine B 52X4S
Removing front camshaft seal
Preparations
Note! Crankshaft or camshaft must not, under any circumstances, be rotated more than is listed below. Failure to follow these instructions may cause damage to the valves.
Remove
the cable from the battery negative terminal.
upper cam cover.
cover over ignition coils.
air cleaner (ACL) cover with air intake hose intake from filter housing. Put to one side.
bracket for the upper torque rod.
camshaft position (CMP) sensor housing and trigger wheel.
rear cover on intake camshaft.
servo reservoir and expansion tank. Lift up and place on top of engine.
Note! Take care not to spill servo oil from the bleed hole in the cap. Place paper wipe around the reservoir and then cover with a plastic bag as protection. Spilled servo oil is highly inflammable.
auxiliaries belt.
front camshaft belt cover.
Position engine according to marking
Remove right front wheel.
Remove nut from fender liner cover.
Place upper camshaft belt cover.
Turn crankshaft clockwise until the markings on the crankshaft and camshaft pulley correspond.
Remove upper camshaft cover.
Lift of the camshaft belt
Slacken off belt tensioner center screw slightly.
Hold the center screw still and turn the tensioner eccentric clockwise with a 6 mm (0.24 in) allen key to "10 o'clock".
Lift the camshaft belt from the tension pulley, camshaft pulley and idler pulley.
Remove timing gear pulleys
Mark up timing gear pulleys: Both intake and exhaust.
Install camshaft adjustment tool 999 5452 at the rear edge of the camshafts.
Remove the screws for the timing gear pulleys.
Pull off timing gear pulleys.
Remove/install camshaft seal
Carefully press in tool 999 5651 between sealing ring and camshaft. Pry out seal. Replace seal:
Grease and install the new seal. Use drift 999 5719 to push it on.
Remove the engine coolant fan (FC)
Remove brake vacuum hose from intake.
Remove control module box air duct and air cleaner (ACL) intake air hose.
Remove connectors, relays and canister purge (CP) valve from fan shroud. Place wiring to one side.
Remove screws from fan shroud and relay holder mounting.
Lift relay holder.
Lift up engine cooling fan (FC) with cover.
Install camshaft adjustment tool
Remove starter motor mounting screws (x3). Place starter motor to one side.
Remove blind cover plug.
Turn the crankshaft slightly clockwise.
Install camshaft adjustment tool 999 5451 . Ensure that it reaches down as far as the cylinder block.
Carefully turn crankshaft counter-clockwise as far as it will go against the camshaft adjustment tool.
Check that the marking on the crankshaft timing gear pulley corresponds with the marking on the oil pump.
Install timing gear pulleys and timing belt
Install the timing gear pulleys with two screws so that they precisely act on the pulleys.
Tighten center screw on the camshaft belt tensioner to 5 Nm (3.7 lb ft)
Install new camshaft belt over crankshaft pulley wheel.
Then install the belt in the following order:
Idler pulley.
Intake cam pulley.
Exhaust cam pulley.
Water pump.
Belt tensioner.
Note! Adjust timing gear pulleys so that the screws are not at the limit positions in any of the oval holes.
Tighten timing belt
Adjust the belt tensioner:
Note! This adjustment is always carried out on a cold engine. Suitable temperature is 20°C/68°F. At higher temperatures, for example with engine at operating temperature or at higher ambient temperature, the needle is further to the right. The illustration shows the needle position when adjusting the camshaft belt tensioner at different engine temperatures.
Tighten the timing belt as follows:
Hold the belt tensioner center screw secure and turn the belt tensioner excenter counter-clockwise until the tensioner needle passes the marked position and reaches its limit position.
Install the screws that are missing on the camshaft belt pulley.
Tighten screws for the timing gear pulleys to 20 Nm (14.75 lb ft) .
Then turn the eccentric back so that the indicator reaches the marked position in the center of the window.
Hold the eccentric secure and tighten the center screw to 20 Nm (14.75 lb ft)
Check that the needle is in the correct position. If this is not the case a new alignment must be carried out.
Remove camshaft adjustment tools from rear edge of camshaft.
Remove drift 999 5451 and install the plug with a new sealing washer. Tighten to 40 Nm (29.5 lb ft)
Check
Press the belt to check that the indicator on the tensioner moves easily.
Install the upper timing belt cover.
Turn the crankshaft two turns and 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
Reinstall:
Front camshaft belt cover. Tighten to 12 Nm (8.85 lb ft)
Upper camshaft belt cover. Tighten to 8 Nm (5.9 lb ft)
Install the auxiliaries belt.
Servo reservoir. Wipe clean. Check the level and top up as necessary.
Expansion tank.
Note! Ensure that hoses are correctly positioned.
Starter motor. Tighten screws at transmission. to 40 Nm (29.5 lb ft) . Support bracket screw. Tighten to 25 Nm (18.44 lb ft) .
Engine cooling fan (FC).
Relay bracket and fan shroud.
Canister purge (CP) valve, relays and connectors.
Air ducts
The trigger wheel. Tighten to 17 Nm (12.54 lb ft)
Camshaft position sensor housing and a new cover. Tighten the camshaft housing to 10 Nm (7.4 lb.ft)
The torque rod bracket and the upper torque rod. Tighten the bracket to 50 Nm (36.9 lb.ft) and torque rod to 35 Nm (25.82 lb.ft) and angle tighten 90 degrees . Use bevel protractor 951 2050 .
Ignition coils cover. Tighten to 8 Nm (5.9 lb.ft)
Air cleaner (ACL) cover and intake air hose.
The battery negative terminal. Note when disconnecting/connecting the battery lead.
Test function
Checking motor
Checked engine function by test driving the engine.
Wipe clean and check engine compartment.
Replacing rear camshaft seal
Preparations
Remove
The air cleaner (ACL) cover and air intake hose between air cleaner (ACL) cover and throttle body (TB). Put to one side.
Ignition coils cover.
Upper torque rod bracket.
camshaft position (CMP) sensor housing and trigger wheel.
Remove the rear camshaft seal
Carefully pull off the seal with extractor 999 5919.
Replace rear camshaft seal
Install new seal:
Grease and install the new seal. Use drift 999 5450.
Note! The seal is normally positioned at the same level as the internal beveled edge. If the shaft journal is showing signs of wear, the seal can be pressed in 2 mm (0.079 in) deeper by turning the drift socket.
Finishing
Install
The trigger wheel. Tighten to 17 Nm (12.54 lb.ft)
Camshaft position sensor housing and a new cover. Tighten screws.
The torque rod bracket. Tighten to 50 Nm (36.9 lb.ft)
Torque rod. Tighten to 35 Nm (25.82 lb.ft) and angle tighten 90 degrees
Ignition coils cover. Tighten to 8 Nm (5.9 lb.ft)
The air cleaner (ACL) cover and air intake hose to intake.
Test function
Checking motor
Checked engine function by test driving the engine.
Wipe clean and check engine compartment.
Wipe dry steering wheel and gear selector lever.
