740d - 2018 - inlet manifold - decoking/walnut blasting?
Discussion
My 2018 740d has reduced power recently - car is under extended BMW warranty
Cars been diagnosed as needing a new inlet manifold, all covered by warranty
BUT
Advisor states that car will need walnut blasting /de coking (this is before theyve even opened the engine up )
My question is
- are the two issues linked?..decoke and inlet manifold
- BMW say the decoke isnt covered by warranty and they will charge £1k inc vat which sounds like a lot for a job that they dont even know that the car actually needs
- they say they are happy to change the inlet manifold without decoking subject to me signing a disclaimer (Im not sure what Id be disclaiming !)
The 740d is my longterm work car and has been superb in my 2.5 yr ownership...I planned to keep for another year
So ...decoke or leave it ?
Cars been diagnosed as needing a new inlet manifold, all covered by warranty
BUT
Advisor states that car will need walnut blasting /de coking (this is before theyve even opened the engine up )
My question is
- are the two issues linked?..decoke and inlet manifold
- BMW say the decoke isnt covered by warranty and they will charge £1k inc vat which sounds like a lot for a job that they dont even know that the car actually needs
- they say they are happy to change the inlet manifold without decoking subject to me signing a disclaimer (Im not sure what Id be disclaiming !)
The 740d is my longterm work car and has been superb in my 2.5 yr ownership...I planned to keep for another year
So ...decoke or leave it ?
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