Engine oil and oil filter replacement (H4Bt)

Introduzione

Applicable to H4Bt engines.

The oil draining and level checks must be done on a flat and leveled surface.

Lifting the vehicle isn't necessary if you are thin enough to go under.

Change every: 20,000km/1 year under optimal driving conditions. Reduce the oil change interval (OCI) if driving under severe use cases.

Note: recommendations are given according to the French RTA's (Revue Technique Automobile) maintenance plan, matching Smart 453's maintenance plan in this case.

Please refer to the wiki defining what may be considered as a severe use case and to get the oil specifications.

Passo 1 Accessing the engine hood

Engine oil and oil filter replacement (H4Bt), Accessing the engine hood: passo 1, immagine 1 di 1

Open the trunk.
Put aside the trunk carpets.

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Passo 2 Acessing the engine compartment

Engine oil and oil filter replacement (H4Bt), Acessing the engine compartment: passo 2, immagine 1 di 1

Unscrew the 6 T50 screws by hand or using a wrench and a socket.
Lift and put aside the engine hood.

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Passo 3 Preparing for the oil change

Engine oil and oil filter replacement (H4Bt), Preparing for the oil change: passo 3, immagine 1 di 1

Lift the dipstick and remove the oil filler cap to help the oil flowing out later on.

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Passo 4 Draining the oil

Engine oil and oil filter replacement (H4Bt), Draining the oil: passo 4, immagine 1 di 1

Place a drain pan under the vehicle.
Unscrew the drain plug using square 8mm key, then finish by hand.
Let oil drain until it stops dropping.
You may use some clean oil to rinse off the dirty left over oil in the engine.

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Passo 5 Extracting the oil filter

Engine oil and oil filter replacement (H4Bt), Extracting the oil filter: passo 5, immagine 1 di 2

Engine oil and oil filter replacement (H4Bt), Extracting the oil filter: passo 5, immagine 2 di 2

Move the drain pan under the oil filter compartment.
Unscrew the oil filter lid.

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Passo 6 Replacing the filter

Engine oil and oil filter replacement (H4Bt), Replacing the filter: passo 6, immagine 1 di 2

Engine oil and oil filter replacement (H4Bt), Replacing the filter: passo 6, immagine 2 di 2

Replace and fit the new oil filter in its compartment until it clicks in place.
Replace and gently lube the lid's seal with engine oil.
Torque the lid at 25 N.m.

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Passo 7 Screwing back the drain plug

Engine oil and oil filter replacement (H4Bt), Screwing back the drain plug: passo 7, immagine 1 di 2

Engine oil and oil filter replacement (H4Bt), Screwing back the drain plug: passo 7, immagine 2 di 2

Clean off the oil pan and the area around the drain plug.
Replace the drain plug's copper seal. The grooved side should face the top of the drain plug if it has one.
Torque the drain plug using an 8mm square socket at 50 N.m.