Before you start, spray all the fixings with a penetrating oil. The more you repeat it and the longer you leave it, the better. Remove the rear panels, the exhaust, the lambda sensor in the exhaust, lower IC pipe and the TIK pipe. Remove the small E10 bolt from just...
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Roadster Fuel Injector Removal
Warning Fuel injectors are connected to fuel pipes. Fuel can set you on fire and make your day miserable. No smoking, lighting farts or juggling flaming batons whilst you are doing this. It is important that you do NOT have the keys in the car. If the ignition gets...
450 Fuel Injector Removal
Warning Fuel injectors are connected to fuel pipes. Fuel can set you on fire and make your day miserable. No smoking, lighting farts or juggling flaming batons whilst you are doing this. It is important that you do NOT have the keys in the car. If the ignition gets...
451 Engine Mount Change
The 451 engine mount suffers badly from wear which allows too much engine movement, swapping it is very easy.
451 CDI AC Belt Change
Changing the air conditioning belt on the diesel isn't the same as the petrol model, they didn't put a pretensioner on that belt for you to loosen to enable the belt to just pull off. However, the alternative is actually easier and doesn't require you to retention the belt correctly afterwards.
Petrol 450 Engine Mounts
This is how to change the 3 engine mounts on the petrol 450 fortwo (600cc and 700cc). 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...
Changing Glow Plugs
How to change the glow plugs in your smart fortwo.
Top Breather Pipe Repair
If your top breather has failed and you are having problems changing it, repair it instead.
451 Air Box Removal
Want to remove the air box to make something more interesting?
450 fortwo Belt Change
This page covers the AC belt and alternator/water pump belt. Air Conditioning Belt Look at the right hand side of the engine. It's not easy to see. Find the tensioner pulley wheel. Use a Torx45 bit to loosen the screw arrowed in the photo below. Push the pulley wheel...
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...
Gearbox Removal
Why remove the gearbox? Maybe you want to change the clutch, maybe your gearbox is fucked.
Intercooler Fan Removal
The intercooler fan is visible over on the left side of the engine bay. Removal is fairly easy. Disconnect the electrical connector from the intercooler fan. Disconnect the throttle body electrical connection and then remove the 4x Torx E10 bolts. Undo the pipe clamps...
Intercooler Radiator Removal
Remove the intercooler fan to gain access to the intercooler radiator. As you have already removed the upper intercooler pipe, you just have to remove the lower intercooler pipe. This runs from the right hand port of the intercooler radiator to the turbo. Just loosen...
Intercooler Scoop Removal
It's common to have a part of the lower intercooler scoop missing as they often get smashed off by stuff in the road like dead foxes and giraffes etc. The scoop is 2 parts so you can just replace the broken section if you want.
450 Fortwo Clutch Removal
The clutch doesn't last forever. It wears down causing slipping and poor pull away.
Lowering The Engine – Roadster
The engine bay is quite restrictive so lowering the engine a bit can help a lot.
Lowering The Engine – 451
This page covers tipping the engine to gain access to the pulleys and full lowering of the engine. Tipping The Engine As with other smarts, the access to the pulleys is restricted but tipping the 451 engine is a bit more tricky. Place a jack under the gearbox and...
451 CDI 54bhp Sensors
54bhp CDI - The Over-Engineered Pain In The Arse The 45bhp CDI engine was reliable and efficient, however, due to the Euro 5 emissions standards coming into force, smart had to make changes. They added a DPF (Diesel Particulate Filter) which removes the particulates...
451 Driveshaft Seals
If you look at the driveshafts where they exit the gearbox and notice oil everywhere, your driveshaft seals are crap. These seals are a lot more important on the 451. I'll explain the reason this later. Firstly you'll have to remove the driveshafts. Use a pry bar or...