Question 1

What are the essential steps and considerations for replacing the cam gear and timing belt on Volvo 940?

Accepted Answer

The timing system is very complex and serious engine damage can occur when mistakes are made so only experienced individuals should attempt this procedure. Before starting the engine, turn the crankshaft by hand at least two complete turns, if there is any resistance, stop immediately to find the problem, because here may be valve and piston contact. It is recommended to replace the timing belt tensioner when replacing the timing belt because the tensioner may leak hydraulic fluid or seize causing a timing belt failure. For B23QF and B230FT engines, disconnect the negative battery cable, remove the timing belt cover, TDC the engine with respect to the No. 1 cylinder, loosen the tensioner nut and remove the timing belt carefully. When installing, make sure to align all of the shafts with their corresponding index marks and install the new belt without sharp tools and check that the timing marks align by rotating the crankshaft. For the B234F engine with two timing belts, follow similar steps being careful with the exact placement of belts and pulleys. For the 2.9L 6-cylinder engine, disconnect the battery, remove required engine covers and belts, align timing marks, and inspect the tensioner and idler pulleys before placing the new belt. For 2.3L and 2.4L 5 cylinder engines, follow a similar steps, taking care of tension and alignment. Adjustments for the B234F engine include a tension gauge to make sure the tension is correct, and the 2.9L engine has similar requirements. Regular inspection of the timing belt for wear and contamination is very important because if there is any indication of wear and debris, it will cause wear and tear of the timing belt very quickly and may cause engine failure. Following the manufacturer's recommended intervals for replacement is vital to ensure the health of the engine.

Question 2

How do Cam Gear, Camshaft Seal and Variable Timing Solenoid affect the procedure for using the camshaft locking tool 999 5452 and ensuring proper valve timing during camshaft sprocket removal on Volvo V70?

Accepted Answer

For this procedure, one needs the Volvo camshaft locking tool 999 5452, which stops the camshafts turning while the sprockets are removed, and details for a home-made alternative are given. It is important that the camshafts be locked so that valve timing is not lost. In addition it is necessary Volvo tool 999 5451. Start by removing the timing belt then remove the air cleaner assembly and intake ducts to get access to the left-hand end of both camshafts. Remove the cross-stay mounting bracket from the top of the engine, then for non-turk models remove the camshaft position sensor housing from the intake camshaft. For turbo models, eliminate the sensor housing from the exhaust camshaft and the sensor rotor plate. Next follow the instructions to remove the bracket from the cylinder head at the left hand end if fitted, and use a screwdriver to prime out the plastic blanking plug at the end of the appropriate camshaft, being prepared for oil spillage. Make sure that the slots in the camshafts are parallel to the join between the upper and lower parts of the cylinder head before locking them in place. Check the timing marks on the crankshaft sprockets and then fit the locking tool on the left-hand side of the cylinder head in such a way that it makes a firm contact with the camshaft slots. If both camshaft sprockets are going to be removed, mark them for identification. For a sprocket that has a variable valve timing unit, use a Torx 55 key to remove the plug and central retaining screw, then pull the camshaft sprocket off. For a sprocket that has no variable valve timing, remove the three bolts and pull out the sprocket. Carefully remove the seal without damaging the sealing face of the shaft, clean the seat of the seal, and lubricate the new oil seal, and fit the oil seal. Refit the camshaft sprocket with aligned timing marks, the bolts tightened just enough to permit movement. For the variable valve timing sprocket, make sure to place the crankshaft in the right position, remove the starter motor and insert the crankshaft stop tool. Rotate the crankshaft anti-clockwise until it hits the tool and press it with the VVT unit onto the camshaft and tighten the tight screw lightly. Adjust the sprocket bolts to the middle of the slots on the VVT unit and tighten gently and turn the VVT unit clockwise to stop and slacken the retaining screw. Temporarily reattaching the timing belt cover and aligning the marks in the sprocket rim with the timing belt cover then tighten the VVT unit screw to the specified torque. Fit the new timing belt to the sprockets, slacken off the bolts holding the VVT unit and non-WT sprocket and refit the center plug to the VVT unit, and tighten it to the specified torque. Apply the appropriate torque of the camshaft sprocket bolts and check the position of the timing belt tensioner arm and adjust, if needed. Finally, remove the camshaft locking tools and crankshaft stop tool, turn the crankshaft clockwise through two full revolutions and check that all the timing marks can be realigned, this means that the tensioner pointer is aligned with the central notch, then complete the refitting process.

Genuine Volvo Cam Gear

15 Cam Gears found

Volvo Timing Gear Set Part Number: 30720161

Volvo Camshaft Gear, Driver Side Part Number: 3531523

Volvo Camshaft Gear Part Number: 9180721

Volvo Timing Gear Set Part Number: 30720163

Volvo Timing Gear Set Part Number: 30720166

Volvo Timing Gear Set Part Number: 30720167

Volvo Camshaft Gear Part Number: 30646225

Volvo Camshaft Gear Part Number: 30646226

Volvo Camshaft Gear, Passenger Side Part Number: 9180934

Volvo Camshaft Gear Part Number: 30759063

Volvo Camshaft Gear Part Number: 30758082

Volvo Camshaft Gear Part Number: 247955

Volvo Camshaft Gear Part Number: 6842032

Volvo Camshaft Gear Part Number: 245082

Volvo Drive Gear Part Number: 1257166

Volvo Cam Gear Parts and Q&A

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