Frequent oil and filter changes are the most important preventative maintenance procedures which can be undertaken by the DIY owner. As engine oil ages, it becomes diluted and contaminated, which leads to premature engine wear.
Before starting this procedure, gather together all the necessary tools and materials. Also make sure that you have plenty of clean rags and newspapers handy, to mop up any spills. Ideally, the engine oil should be warm, as it will drain better, and any impurities suspended in the oil will be removed with it. Take care, however, not to touch the exhaust or any other hot parts of the engine when working under the vehicle. To avoid any possibility of scalding, and to protect yourself from possible skin irritants and other harmful contaminants in used engine oils, it is advisable to wear gloves when carrying out this work. Access to the underside of the vehicle will be greatly improved if it can be raised on a lift, driven onto ramps, or jacked up and supported on axle stands. Whichever method is chosen, make sure that the vehicle remains level, or if it is at an angle, that the drain plug is at the lowest point. Where fitted, release the screws and remove the engine undershield.
Slacken the drain plug about half a turn, position the draining container under the drain plug, then remove the plug completely
. If possible, try to keep the plug pressed into the sump while unscrewing it by hand the last couple of turns
(see Haynes Hint)
. Recover the sealing ring from the drain plug.
Unscrew the sump drain plug
As the drain plug releases from the threads, move it away sharply so the stream of oil issuing from the sump runs
Allow some time for the old oil to drain, noting that it may be necessary to reposition the container as the oil flow slows to a trickle.
After all the oil has drained, wipe off the drain plug with a clean rag, and fit a new sealing washer. Clean the area around the drain plug opening, and refit the plug. Tighten the plug to 16 Nm (12 Ibf ft).
Move the container into position under the oil filter, which is located in a housing on the front of the cylinder block.
Release the diesel hand priming pump from its brackets at the right-hand end of the air cleaner housing.
Slacken the retaining clip and disconnect the air inlet hose from the turbocharger
Slacken the clip (arrowed) and disconnect the air inlet hose from the turbocharger
Disconnect the air mass meter wiring connector then undo the screw securing the air mass meter to the air inlet duct
Disconnect the air mass meter wiring connector (A) then undo the retaining screw (B)
Undo the two screws securing the air cleaner housing to the cylinder head cover
Undo the two air cleaner housing screws (arrowed)
Disconnect the breather hose from the cylinder head cover, then lift the air cleaner assembly upwards to disengage the rear mounting lugs from the mounting rubbers.
Reach behind the air cleaner assembly, release the clip and disconnect the air inlet hose from the base of the housing.
Withdraw the air cleaner assembly from the engine, disconnecting any wiring plugs or hose clips as necessary as the unit is withdrawn.
Remove the air deflector by turning the plastic retainer through 90°. Withdraw the air deflector from the front of the air inlet ducting
Remove the air deflector by turning the plastic retainer (arrowed) through 90°
Pull out the centre of the plastic expansion rivet securing the air inlet ducting to the front panel, then pull out the entire rivet
Pull out the centre of the plastic expansion rivet (arrowed) then pull out the entire rivet
Lift the front of the inlet ducting upward to release the mounting lug from the front of the battery box. Manipulate the rear of the inlet ducting out from under the fuel filter and remove the ducting from the car. For improved clearance, undo the fuel filter retaining screw and lift the filter from its mounting bracket slightly.
Using a socket or spanner, unscrew the oil filter housing cover and withdraw the cover complete with the filter element
Unscrew the oil filter housing cover . . .
. . . and withdraw the cover complete with the filter element
Pull the filter element out of the cover, then remove the cover O-ring seal
Remove the cover O-ring seal
Use a clean rag to remove all oil, dirt and sludge from the inside and outside of the filter housing and cover.
Locate the new filter element into the filter housing, ensuring that the non-return valve on the base of the filter engages with the corresponding orifice in the housing
Ensure that the non-return valve (arrowed) on the base of the filter . . .
. . . engages with the corresponding orifice (arrowed) in the housing
Apply a little clean engine oil to the new O-ring seal, and fit it to the filter housing cover.
Refit the cover to the housing and tighten the cover to 25 Nm (18 Ibf ft).
Remove the old oil and all tools from under the car, then lower the car to the ground (if applicable).
Remove the dipstick, then unscrew the oil filler cap from the top of the engine. Fill the engine, using the correct grade and type of oil. An oil can spout or funnel may help to reduce spillage. Pour in half the specified quantity of oil first, then wait a few minutes for the oil to run to the sump. Continue adding oil a small quantity at a time until the level is up to the lower mark on the dipstick. Adding approximately 1.8 litres will bring the level up to the upper mark on the dipstick. Refit the filler cap.
|Engine oil quantity
|Engine oil grade
||Synthetic or semi-synthetic multigrade engine oil, viscosity SAE 10W-40 to specification API CF/CD and/or ACEA B3: ESSO ULTRA DIESEL or TOTAL QUARTZ DIESEL 7000
Refit the air cleaner air intake ducts.
Start the engine and run it for a few minutes; check for leaks around the oil filter and the sump drain plug. Note that there may be a delay of a few seconds before the oil pressure warning light goes out when the engine is first started, as the oil circulates through the engine oil galleries and the new oil filter (where fitted) before the pressure builds-up.
Switch off the engine, and wait a few minutes for the oil to settle in the sump once more. With the new oil circulated and the filter completely full, recheck the level on the dipstick, and add more oil as necessary.
Dispose of the used engine oil and filter safely. Do not discard the old filter with domestic household waste. The facility for waste oil disposal provided by many local council refuse tips generally has a filter receptacle alongside.