As you say, the sensor reluctor rotor has two pegs (one round and one cut at 45degrees) that locate with the slot and 45 degree cut out on the end of the camshaft, ensuring positive location. The problem came with tightening the bolt that holds it on. It is difficult to tighten the fixing bolt into ...

Your guess is probably right as there was an issue with the VVT unit. On this car the inlet cam shaft is fitted with a VVT. Though it was probably not necessary I used the Laser tool 6558 to set the timing, that's the kit that locks the camshafts by a bar with adaptors fitted to the free end of each...

I carried out a timing belt change and subsequently notice a popping noise heard by listening just behind the front wheel and appearing to come from the exhaust just behind the engine. It sounds like unburnt fuel igniting in the down pipe. The noise cannot be noticed from under the bonnet. It is get...