Because the smart is generally hard to work on, it just wouldn't be right if changing the oil pump was an easy task. So it's no surprise to find out that it's a lot of work to get to but very simple to actually change. Remove the air inlet manifold, rocker cover,...
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Engine
Roadster Rocker Cover Removal
Remove the spark plugs and air inlet manifold to reveal the crusty and corroded rocker cover. Use an E10 socket to remove the 6 bolts holding it down. One of this bolts also holds the oil dip stick tube in position. Pull off the large rubber breather hose from the TIK...
Roadster Starter Motor Fix
This is the starter motor removed from the car. Actually removing it is a terrible job. Annoyingly, it's rarely the starter motor that fails so removing it is usually unnecessary. So, if you go to start the car and you only hear a click from the fuse box, you have a...
Roadster Starter Motor Removal
Fully lower the engine using the engine lowering studs. Click here. The starter motor is down the back of the engine behind the inlet manifold. Disconnect the 2 coolant pipes that run over the top of the starter motor. It's hard to see what the hell is going on as...
Roadster Thermostat Valve Change
What Are The Symptoms Of A Failed Thermostatic Valve? The thermostatic valve starts closed which only allows the the water to circulate around the engine. As the engine temperature increases, the water temperature also increases. Eventually, the thermostatic valve...
Roadster Timing Chain Change
Why Would We Need To? A phenomenon incorrectly called "chain stretch" is the main reason for requiring a new chain fitting. The thickness of the slide rail, the maximum movement of the chain tensioner and an excessive lengthening of the chain eventually causes issues....
Roadster Timing Chain Cover Removal
I did this with the engine removed. If you want to try it with the engine still in the car, you go for it you nutcase. You'll hate yourself by the end of it but you will have gained the dexterity to wallpaper your hallway through the letterbox. Remove the belts. See...
Roadster Timing Chain Guide Removal
Once you've removed the cylinder head, you'll notice the main chain guide comes with it and is captive within the head. Since you are this far into the engine, you may as well fit new guides, tensioner and chains. To remove the main chain guide, you need to remove...
Roadster Wastegate Actuator Hoses
Understanding Engine Hose Position If you have a BCS (Boost Control Solenoid AKA Cycle Valve) as most new smarts do, you will notice that there is a maze of pipes surrounding the turbo. So here is a roundup of where they come from, the colour and where they all go....
S-mann Exhaust Fitting
Mid way between MOT's I had the emissions checked on my 2011 fortwo 451 turbo and it looked like it would fail when the MOT came around. It was a 2nd hand Brabus exhaust that I had put on in 2012 so it had lasted OK. I didn't really want to put the standard exhaust...
Secondary Air Injection Pump
It is becoming more and more common for people to report a terrible noise for about 90 seconds on start up. This is due to the secondary air pump. People with no actual clue often call this an EGR pump. This secondary air injection pump can be found on 700cc fortwos...
Seized Alternator
On the 450 fortwo and the Roadster, due to the open design and the placement of the alternator, if you drove your car in wet conditions and then left the car standing for a few weeks, there is a chance it won't start. This is because water gets in and creates rust and...
Sequential DV Servicing
The sequential DV is a bit more complex than other types so there is more that can go wrong. Keep it clean and it’ll last a lot longer.
Servicing The Clutch Actuator
It is becoming more and more common to hear of slower gear changes, increased revs before the clutch engages and smart being unable to adjust the clutch on their Star machine. Something new was shown to me.
Sila 451 Induction Kit
This is the Sila air intake as provided by SmartMadness in America for this fitting guide and a future review
SmartMods HT Leads
Replacement performance silicone HT leads
Starter Motor Repair
If your engine won't even turn but you can bump start it and it runs fine, you may be looking at a duff starter motor.
Suprex Coolant Sensor Change
How to change the engine coolant temperature sensor on the Suprex engine
Testing Glow Plugs
How to test the glow plugs to see which one is faulty.
The Camshaft
It's a multi-lobed shaft that rotates to open the inlet and outlet valves to the engine. The 600cc, 700cc and Roadster Camshafts are interchangable. Putting a roadster camshaft into a For2 increases the engine power.