Mod Details
PremiumNo Difficulty![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-over.png)
![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-over.png)
![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-over.png)
![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-off.png)
![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-off.png)
![450 Fortwo 450 Fortwo](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model5.png)
![451 Fortwo 451 Fortwo](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model6.png)
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 using 6 bolts
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet1.jpg)
If you disconnect the glow plug connectors and lift the wiring loom out of the way, you’ll see 3 of the 6 bolts…
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet2.jpg)
…and the rest further on are a bit more tricky to get to.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet3.jpg)
Especially the last one that you can barely see between the inlet manifold and the fuel pipe.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet4.jpg)
The 6 bolts are all E10 but you’ll have to do a little work to get to them all.
There’s a bracket for the fuel pipe, it’s bolted down with an E8 bolt, remove it.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet5.jpg)
You can then lift all of the wiring loom out the way to gain access to all 6 bolts.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet6.jpg)
You can either disconnect the EGR mixer using an E10 socket or disconnect the rubber pipe from the inlet manifold by removing the pipe clip using a 7mm socket.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet7.jpg)
Before lifting the inlet manifold out, you’ll have to disconnect the manifold pressure sensor. The sensor is connected to the manifold with a rubber pipe. I don’t recommend trying to unplug the pipe from each end as the pipe connections tend to snap. So leave the sensor connected.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet8.jpg)
Use a T50 to remove both nuts.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet9.jpg)
The air inlet manifold can now be removed safely from the engine.
![](https://www.evilution.co.uk/wp-content/uploads/smartengine/inletmanifold/cdiinlet10.jpg)