Diesels are dirty engines, they are noisy but they are efficient. However, if they can't breathe then you aren't getting the best from the engine.
Smartmods
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Engine
Air Conditioning Gas Quantities
AC Gas Type And Quantity Model Gas Type Gas Qty Grams Oil Type Oil Qty Millilitres 450 Fortwo 600cc R134A 620 ± 10 PAG 46 or PAO 68 180 450 Fortwo 700cc R134A 450 ± 10 PAG 46 or PAO 68 180 450 Fortwo Diesel R134A 450 ± 10 PAG 46 or PAO 68 180 451 Fortwo Non Turbo...
Air Locks – Bleeding
An air lock in the coolant system can cause overheating of the engine, a cooked turbo or just lack of heat from the heater. Lets get rid of it.
Basic Smart Engine Diagram
Adapted from a picture by Gerald Drane to make it relevant to the Smart.
Bosch Injector Servicing
The smart 450 fortwo petrol and Roadster uses Bosch EV6 injectors and like all injectors, they eventually require cleaning. The injectors have replaceable filters that catch anything that the fuel filter lets passed. If you are removing your injectors to clean and...
Brabus Style Engine Plate
When you buy a Brabus you get a natty looking plate on the top of the engine stating it is a Brabus, the main problem is that the plate is pretty poorly made and we don’t all have or want Brabus written on the engine.
Brake Fluid Specs
This is going to be a short and easy page of information since, unlike oil and other fluids, all smarts use exactly the same brake fluid. Recommended Brake Fluid Smart recommend MB 331.0 brake fluid which is one of the following part numbers: 000 989 08 07 000 989 56...
Brake Hose Capping Tools
Air In The Brake System = Bad We all know what gravity does. What you might not know is what happens when you disconnect brake pipes and lines. The brake fluid reservoir, master cylinder, ABS pump and most of the hoses are higher than the points you disconnect. So,...
Breather Pipes
There are a few interesting things about the oil breather pipes.
CDI Inlet Manifold Removal
This is very similar for the 450 CDI and both models of 451 Diesel. This is for a 45bhp 451 CDI which is almost the same as the 450 CDI. The 54bhp CDI has a throttle body connected to the left side of the inlet manifold. The air inlet manifold is held to the engine...
Changing Glow Plugs
How to change the glow plugs in your smart fortwo.
Charge Cooler Fluid Change
This probably isn't the information you think it is. However, it's more important. How Do I Drain The Charge Cooler System? See, this is the information you thought was going to be here but really, it's not. All you have to do is take a pipe off the charge cooler...
Charge Cooler Fluid Info
Just in case you can't read German
Checking the Oil Level
The oil in your car keeps things moving and not melting into one big part.
Clutch Adjustments
The clutch actuator pushes the arm that moves the clutch in and out.
Coil Pack Removal
The coil packs convert the car battery power to a high voltage, low ampage current that is sent to the spark plugs via the HT leads.
Crankshaft Rotation Sensor
The crankshaft is what the pistons are attached to. The crankshaft sensor measures the rotation of the crankshaft (and therefore the position of the pistons) so the ECU knows when to inject petrol and to fire the spark plug.
Cylinder Head Bolts
It is important when refitting the cylinder head to get the bolts right
Delip the Air Intake
Delipping the smart air intake seems to increase throttle response, increase the speed of the gear change and give the engine a little extra power for no extra money.
Diesel 450 Engine Mounts
This is how to change the 3 engine mounts on the Diesel 450 fortwo. Side Engine Mounts Remove the bolts from the X-frame on either side and remove it from the car. You can just undo the top bolts and pull the x frame down to get some clearance however, it's easier to...