N62 4.8is- Engine REBUILD after Valvetronic/Vanos issues/codes

[Nolimite39]

That just doesn't sound right. If the fuel pump failed they should have been able to tell immediately by reading fuel pressure which should be a part of normal diagnostic procedure. Also if it failed previously how is it back to good order now? The metal shavings shouldn't be making it through the fuel filter so they couldn't have clogged the injectors. Sounds to me like something wasn't connected or was plugged in incorrectly and they "fixed it" during reassembly. I'd still be asking questions. I don't know anything about your shop and they may be great, I am just very skeptical, especially because so many bmw "mechanics" rely solely on what the car's computer tells them without ever actually performing normal diagnostic. Either way, I hope that's the end of your troubles and you get to enjoy your X.

Just thought about something else. I belive the N62 has dual vanos, if so are they easy to swap connectors on? That will wreak all sorts of havoc. Similar to accidentally swapping the left vanos and vent solenoid connector on an M62.

[X5only]

Originally Posted by Nolimite39

That just doesn't sound right. If the fuel pump failed they should have been able to tell immediately by reading fuel pressure which should be a part of normal diagnostic procedure. Also if it failed previously how is it back to good order now? The metal shavings shouldn't be making it through the fuel filter so they couldn't have clogged the injectors. Sounds to me like something wasn't connected or was plugged in incorrectly and they "fixed it" during reassembly. I'd still be asking questions. I don't know anything about your shop and they may be great, I am just very skeptical, especially because so many bmw "mechanics" rely solely on what the car's computer tells them without ever actually performing normal diagnostic. Either way, I hope that's the end of your troubles and you get to enjoy your X.

Just thought about something else. I belive the N62 has dual vanos, if so are they easy to swap connectors on? That will wreak all sorts of havoc. Similar to accidentally swapping the left vanos and vent solenoid connector on an M62.

Yes, it does. Swapping them and also the cam sensors would cause all manner of havoc - unexplainable misfires, poor idling, etc. Happened to me after doing the valve stem seals.

[Homerlovesbeer]

Originally Posted by Nolimite39

That just doesn't sound right. If the fuel pump failed they should have been able to tell immediately by reading fuel pressure which should be a part of normal diagnostic procedure. Also if it failed previously how is it back to good order now? The metal shavings shouldn't be making it through the fuel filter so they couldn't have clogged the injectors. Sounds to me like something wasn't connected or was plugged in incorrectly and they "fixed it" during reassembly. .

I actually think they were saying that the fuel pump may be about to fail, it didn't stop working and suddenly start working again.

Good point on the shavings making it past the fuel filter, I'll raise that with them.

The shop is a BMW specialist shop full of ex BMW mechanics.

Honestly I think they've done a great job so far, this current issue was a curly one and appears to be bad fuel.

I have no issues recommending the shop.

[EODguy]

Originally Posted by Nolimite39

That just doesn't sound right. If the fuel pump failed they should have been able to tell immediately by reading fuel pressure which should be a part of normal diagnostic procedure. Also if it failed previously how is it back to good order now? The metal shavings shouldn't be making it through the fuel filter so they couldn't have clogged the injectors. Sounds to me like something wasn't connected or was plugged in incorrectly and they "fixed it" during reassembly. I'd still be asking questions. I don't know anything about your shop and they may be great, I am just very skeptical, especially because so many bmw "mechanics" rely solely on what the car's computer tells them without ever actually performing normal diagnostic. Either way, I hope that's the end of your troubles and you get to enjoy your X.

Just thought about something else. I belive the N62 has dual vanos, if so are they easy to swap connectors on? That will wreak all sorts of havoc. Similar to accidentally swapping the left vanos and vent solenoid connector on an M62.

+1

Also is possible to either park (for lack of a better term) the Vanos for removal or adjust out of position via Foxwell, etc causing insanely difficult to undo problems without the engine running correctly...

Don't ask how I know.

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