Volvo Coupes/Sedans/Wagons 1970-1989 Repair Guide

Oil Pan

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REMOVAL & INSTALLATION



B20 (Except 240 Series) and B30 Engines

The oil pan may be removed from the engine while the engine is still in the chassis.

  1. Place supports on the frame side members. Insert a lifting hook into the plate bolted to the front of the engine. Using a lifting apparatus, raise the engine until there is no weight on the front engine mounts. Remove the oil dipstick.
  2.  
  3. Jack up the vehicle and place jackstands under the front jacking points. Drain the crankcase oil.
  4.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the lower nuts for the engine mounts. On 140 series models, remove the steering rods from the pitman arm and relay arm with a puller.
  2.  
  3. Place a hydraulic floor jack beneath the front axle member. Remove the rear bolts of the front axle member and replace them with two longer auxiliary bolts (UNC 1 / 2 -13 x 114mm). Remove the front bolts for the front axle member and lower the hydraulic jack, allowing the axle member to hang on the auxiliary bolts.
  4.  
  5. Remove the plug for the oil temperature gauge, if so equipped, and the reinforcing bracket at the flywheel.
  6.  
  7. Unscrew the oil pan bolts and lower the pan. Remove the old gasket and clean the surfaces of the cylinder block and oil pan. Remove any sludge or foreign matter that has accumulated at the bottom of the pan.
  8.  

To install:
  1. Using a new gasket, position the pan to the cylinder block and install the oil pan bolts. Tighten the bolts to 6-8 ft. lbs. (8-11 Nm).
  2.  
  3. Install the plug for the oil temperature gauge, if so equipped. Position the reinforcing bracket to the cylinder block and flywheel casing and install the bolts finger-tight. Snugly tighten the bolts for the flywheel casing and then those for the cylinder block.
  4.  
  5. Raise the hydraulic jack, lifting the front axle member, and tighten the front bolts. Remove the auxiliary bolts and install the original rear bolts of the front axle member.
  6.  
  7. Install the lower nuts for the front engine mounts. On 140 series models, connect the steering rods at the pitman arm and relay arm, and fit the nuts.
  8.  
  9. Remove the jackstands and hydraulic jack. Lower the vehicle. Remove the lifting apparatus.
  10.  
  11. Insert the dipstick. Fill the crankcase with the proper amount and grade of oil.
  12.  
  13. Start the engine and check for leaks.
  14.  

B20 Engine-1975 240 Series

On these models, the motor mounts are located high in the chassis, permitting more than 2 inches of clearance between the bottom of the oil pan and the steering linkage and suspension. Therefore, oil pan removal is a simple matter of unbolting the attaching bolts.

Always use a new gasket when installing the pan. A few dabs of oil-resistant sealer on the gasket at the front and rear main seals will help prevent oil leaks. Tighten the attaching bolts to no more than 6-8 ft. lbs. (8-11 Nm) of torque in a diagonal criss-cross pattern.

B21 Engines Built Prior to May, 1979

See Figures 1, 2, 3, 4, 5 and 6

  1. Attach lifting equipment or chain hoist to the lifting eye on the thermostat housing.
  2.  
  3. On air conditioned models, remove the compressor from its bracket to gain access to the motor mount.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Use a lifting tool, such as the one shown, to support the engine during oil pan removal

  1. Remove the retaining bolts for the left motor mount at the cylinder block.
  2.  
  3. Drain the crankcase.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: Attach lifting equipment or a chain hoist to the lifting eye on the thermostat housing


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the splash guard.
  2.  
  3. Raise the engine slightly.
  4.  
  5. Remove the left motor mount from the chassis.
  6.  
  7. Remove the engine-to-clutch housing brace.
  8.  
  9. Remove the oil pan retaining bolts. Tap the pan loose, swivel and remove.
  10.  



Click image to see an enlarged view

Fig. Fig. 3: Use a socket and extension to remove the oil pan retaining bolts



Click image to see an enlarged view

Fig. Fig. 4: Tap the pan loose, swivel and carefully remove



Click image to see an enlarged view

Fig. Fig. 5: The underside of the engine as viewed with the oil pan removed

To install:
  1. Remove the old gasket and clean the surfaces of the cylinder block and oil pan. Remove any sludge or foreign matter that has accumulated at the bottom of the pan.
  2.  
  3. Using a new gasket, position the pan to the cylinder block and install the oil pan bolts. Tighten the bolts to 6-8 ft. lbs. (8-11 Nm).
  4.  



Click image to see an enlarged view

Fig. Fig. 6: Use a gasket scraper to clean the mating surfaces of the cylinder block to allow the new gasket to properly seal

  1. Install the engine-to-clutch housing brace.
  2.  
  3. Reattach the left motor mount to the chassis and lower the motor to its normal position.
  4.  
  5. Attach the left motor mount to the cylinder block. When the engine is securely mounted, the lifting apparatus may be removed.
  6.  
  7. Fill the engine oil to the proper level.
  8.  
  9. Reinstall the air conditioning compressor if it was removed for access.
  10.  
  11. Start the engine and allow it to warm up to normal operating temperature. Check the pan area carefully for signs of leaks or seepage.
  12.  
  13. Install the lower splash shield.
  14.  

B21 (Built May, 1979 and Later), B23 and B230 Engines

See Figures 7 and 8

Due to the deeper oil pan on these models, the front axle member must be disconnected and lowered to remove the pan.

  1. Raise the vehicle and support it on jack stands.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Drain the engine oil, then replace and tighten the drain plug.
  6.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the splash guard from underneath the engine. Disconnect the exhaust system at the flange in front of the muffler.
  2.  
  3. From underneath, remove the engine mount retaining nuts. On B23E and B230E models, it is also necessary to disconnect the bracket at the intake manifold.
  4.  
  5. Disconnect the steering shaft at the steering gear. On vehicles with manual transmissions, pull up the shield.
  6.  
  7. Lift the engine slightly using either a chain hoist or a crossbar lifter. Do not lift too high or other components will be damaged. It may be necessary to loosen the fan shroud to allow clearance during the lifting process.
  8.  
  9. On vehicles with power steering, disconnect the hose at the reservoir. Pinch or plug the line to prevent leakage and the entry of dirt. Place a jack under the front axle member for support. Remove the retaining bolts from the front axle member and lower it on the jack.
  10.  
  11. Remove the left side engine mount.
  12.  



Click image to see an enlarged view

Fig. Fig. 7: Remove these nuts to detach the left side engine mount

  1. Remove the support bracket across the rear of the engine.
  2.  
  3. Remove the oil pan retaining bolts. Loosen, turn and remove the oil pan. Clean the gasket surfaces. Install the new gasket on the oil pan and install the pan. Tighten the bolts to 8 ft. lbs. (11 Nm). To reassemble:
  4.  
  5. Attach the reinforcing bracket. If the car has power steering, reconnect the lines at the reservoir.
  6.  



Click image to see an enlarged view

Fig. Fig. 8: Exploded view of the lubrication system and oil pan-B21 and B23 engines. B230 is similar

  1. Raise the front axle on the jack and install and tighten the retaining bolts.
  2.  
  3. Reconnect the steering shaft at the steering gear. The flange will only fit in one position.
  4.  
  5. Install the left side engine mount. On E-series motors, reconnect the bracket at the intake manifold.
  6.  
  7. Lower the engine into position. Fit the mount onto the front axle member. Disconnect and remove the lifting equipment when the engine is in position.
  8.  
  9. Install the dipstick and tube. Install and tighten the nuts on the engine mount.
  10.  
  11. Secure the fan shroud if it was loosened and install the splash guard under the engine. Attach the exhaust system at the muffler flange.
  12.  
  13. Return the car to the ground by safely removing the jackstands.
  14.  
  15. Fill engine oil to proper capacity. Double check all installation items, paying particular attention to loose hoses or hanging wires, loose nuts, poor routing of hoses and wires (too tight or rubbing) and tools left in the engine area.
  16.  
  17. Start the engine and check carefully for leaks, particularly after the engine is warm.
  18.  

B234 Engine
  1. Safely elevate the car and support it on jackstands. Disconnect the negative battery cable and remove the engine oil dipstick.
  2.  
  3. Remove the air mass meter and air inlet hose. Loosen the fan shroud.
  4.  
  5. Remove the bolts at both ends of the crossmember.
  6.  
  7. Fit a chain hoist or lifting apparatus to the top of the engine and relieve the weight of the engine by lifting the at the front.
  8.  
  9. At the right motor mount, unbolt the bottom mounting plate from the crossmember. At the left motor mount, unbolt the upper mounting plate from the cylinder block.
  10.  
  11. Drain the engine oil and replace the drain bolt when the pan is empty. Use a new washer and tighten the bolt to 44 ft. lbs. (60 Nm).
  12.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the splash guard from under the engine, the bottom nut for the left motor mount and the wiring harness bracket from the transmission cover.
  2.  
  3. At the steering shaft, remove the lower clamping bolt and loosen the upper bolt. Matchmark the position of the splined joint and slide the fitting up the steering shaft.
  4.  
  5. Remove the rubber bumpstop on the front crossmember and remove the reinforcing bracket between the engine and transmission.
  6.  
  7. Disassemble the bolted joint at the front of the catalytic converter.
  8.  
  9. Carefully elevate the engine with the hoist. Make very certain that no hoses or wires are strained and that clearance is maintained at the firewall.Raise the motor only enough to perform the next steps of the procedure.
  10.  
  11. Remove the left motor mount.
  12.  
  13. Unbolt and remove the oil pan. It will need to be lifted and turned during removal.
  14.  
  15. Clean the gasket surfaces and install the new gasket (always!) so that the small tab on the gasket is on the same side as the starter. Lift the pan into place, install the retaining bolts and tighten them to 8 ft. lbs. (11 Nm).
  16.  
  17. Install the reinforcing bracket between the engine and transmission. Attach it first to the transmission and then to the engine block. Tighten the bracket in stages so that all the bolts pull up evenly.
  18.  
  19. Install the bumpstop on the front crossmember. Lift the crossmember into position against the side rails, install the bolts and tighten only a few turns to hold it in place.
  20.  
  21. When all the bolts are installed, tighten the crossmember bolts to 70 ft. lbs. (95 Nm). Install the left motor mount and secure the plate to the cylinder block. Don't forget to attach the cable clip on the upper bolt.
  22.  
  23. Paying close attention to the placement of the motor mounts, lower the engine into position. When the engine is correctly seated, the lifting equipment may be removed from the car.
  24.  
  25. At the right motor mount, tighten the plate onto the crossmember. Check the connection of the air preheat tube at the exhaust manifold.
  26.  
  27. Tighten the fan shroud. Adjust the position of the bottom bracket as needed.
  28.  
  29. Reconnect the wiring harness bracket at the transmission, the bolted joint at the front of the catalytic converter and install the splash guard under the engine.
  30.  
  31. Tighten the left motor mount.
  32.  
  33. Observing the markings made earlier, reassemble the steering shafts. Insert and tighten the bottom bolt to 15 ft. lbs. (20 Nm). Tighten the upper bolt the same. Don't forget to install the small spring clips on the bolts.
  34.  
  35. Install the air mass meter and its hoses and connectors.
  36.  
  37. Fill the engine with the correct amount of oil and reinstall the dipstick.
  38.  
  39. Lower the car to the ground, reconnect the battery cable and start the engine. Check for leaks.
  40.  

B27, B28 and B280 Engines

See Figure 9

The following procedure is for the small steel oil pan at the front of the engine. This will not expose the crankshaft.



Click image to see an enlarged view

Fig. Fig. 9: Exploded view of components of the lubrication system-B27F engine shown, B28F and B280F are similar

  1. Remove the splash shield.
  2.  
  3. Drain the crankcase and reinstall the drain plug.
  4.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the oil pan retaining bolts. Swivel the pan past the stabilizer bar and remove the pan. Remove the old gasket and clean the surfaces of the cylinder block and oil pan. Remove any sludge or foreign matter that has accumulated at the bottom of the pan.
  2.  

  1. Using a new gasket, position the pan to the cylinder block and install the oil pan bolts. Tighten the bolts to 6-8 ft. lbs. (8-11 Nm). Fill the oil to the proper capacity and reinstall the splash shield.
  2.  

Diesel Engine

The oil pan cannot be removed without either lifting the engine or removing it from the car. The combination procedure for removing the oil pan and the oil pump is found in Oil Pump Removal and Installation later in this section.

 
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