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hi there you have to remove the top engine mount and inlet manifold about 15 bolts its a bit potchy to get out and then you can get at the heater plugs
2 ways easiest is too remove inlet manifold other is too remove engine 3 ltrs only
on the V6 you need to remove the inlet manifold and if you release the o/s engine mount at the top the engine will drop enough to give access to the rear 3 plugs, what a nightmare
The G8t engine? You are not going to like/believe this.... you need to remove the engine (bu lifting the car off it using a 2 post ramp) to remove the manifold. French design! It is just possible to remove pre-heaters & injectors with the manifold, and the engine, in situ. But any more than that - no.
On my 2000 model it is at the back of the engine under the inlet manifold and its virtually impossible to access the little sucker.
it is located on the inlet manifold below throttle body you need to remove manifold and remove sensor from underside
When you stand at the frount of othe car, bonet up. The temp switch is under the Inlet manifold (left side) at the front of the engine.
On the 12 valve engine it is positioned underneath the inlet manifold at the gearbox end to replace I found it easier to remove the inlet manifold after wasting time trying to do it with the manifold in place.
The exhaust manifold will have an exhaust pipe attatched! The exhaust manifold for example on a scenic 1.6 petrol, is located at the front of the engine block and have a heat shield attatched.
this is a mechanics job you have to remove inlet manifold,exhaust manifolds,and then remove heads to replace the valves
Its near firewall. Have to remove exhaust manifold,Inlet housing to waterpump,and block.
everyone says it's very fiddly. replacement costs 200+200 labour