[outofphase]

2015 335i xDrive here w/ 70k miles. Went WOT the other night, misfired and went into limp mode with smoke/extreme fuel smell so I immediately shut down and got it towed to the dealer.

Injector #4 failed, #5 and #6 on their way out. Dealer calls me and says it’ll be $4409 to replace all 6. Hell no! Towed back to my place, I’m planning on tackling it myself now. Doing plugs, coils, oil, coolant, and oil filter housing gasket while I’m at it. Bought all the tools I needed and the scanner for coding and a rental since I’m saving so much money lol.

My question is, since 1 (or more) cylinders were flooded with unburnt gas, what’s the best way to get it out without risking hydrolock? I’ve only dealt with this once a long time ago in my CRX, I just pulled the fuse for the pump and cranked it until it died, but this being a DI (and the most sophisticated car I’ve ever owned), I wanted to ask here first. Any tips/advice would be greatly appreciated!

[n55david]

It really shouldn't be a problem but you can literally pull the plugs and use a little hand pump with a flexible hose to pump put any fuel that has collected. If the cylinder really was full of fuel that would be the easiest way. Also change the oil immediately after getting it running again.

[XutvJet]

How in the hell could replacing 6 injectors cost $4500? The BMW EU6 injectors (made by Bosch) are ~$350/ea or you can be the same non-BMW branded Bosch injector for $90. Even with buying the BMW injectors and the injector seals, the parts costs would around $2,200. It would literally take a tech an hour to remove and replace the six injectors but I'm sure book time is something like .75 hours each so figure $1,200 in labor. So where is the remaining $1,000? I just just get how BMW dealers charge so much and how their pricing is so wildly variable amongst their dealerships. Book time estimates are supposed to even the playing field but this doesn't seem to apply to BMW dealers.

[thejeremyman9]

Originally Posted by n55david

It really shouldn't be a problem but you can literally pull the plugs and use a little hand pump with a flexible hose to pump put any fuel that has collected. If the cylinder really was full of fuel that would be the easiest way. Also change the oil immediately after getting it running again.

Or just pull all the plugs and turn the engine over. If it ran before shutting down though i down its completely flooded with fuel, and if it has been a while, its probably seeped past the rings anyways

[n55david]

Originally Posted by thejeremyman9

Or just pull all the plugs and turn the engine over. If it ran before shutting down though i down its completely flooded with fuel, and if it has been a while, its probably seeped past the rings anyways

It absolutely has, hence the oil change immediately after getting it to run. The problem is a lot of that fuel just will get dumped put the exhaust if you do that. Bad for the turbo and etc...

[outofphase]

Originally Posted by n55david

It really shouldn't be a problem but you can literally pull the plugs and use a little hand pump with a flexible hose to pump put any fuel that has collected. If the cylinder really was full of fuel that would be the easiest way. Also change the oil immediately after getting it running again.

Still have a little handheld pump I used to use for siphoning oil from old fiat, I’ll give that a shot!

Originally Posted by n55david

It absolutely has, hence the oil change immediately after getting it to run. The problem is a lot of that fuel just will get dumped put the exhaust if you do that. Bad for the turbo and etc...

That’s what I was worried about. Doing an oil change after to play it safe.

So if I:

-pull plugs
-suck up as much as I can with the pump
-turn the engine over
-install new injectors
-install oil filter housing gasket
-change oil
-install new coils+plugs

…is that the best order to do things?

[outofphase]

Originally Posted by XutvJet

How in the hell could replacing 6 injectors cost $4500? The BMW EU6 injectors (made by Bosch) are ~$350/ea or you can be the same non-BMW branded Bosch injector for $90. Even with buying the BMW injectors and the injector seals, the parts costs would around $2,200. It would literally take a tech an hour to remove and replace the six injectors but I'm sure book time is something like .75 hours each so figure $1,200 in labor. So where is the remaining $1,000? I just just get how BMW dealers charge so much and how their pricing is so wildly variable amongst their dealerships. Book time estimates are supposed to even the playing field but this doesn't seem to apply to BMW dealers.

I was absolutely livid! Technically it was $3860 for the injectors, $289.99 for fuel intake flush, $259.99 for oil change/engine flush. But the latter two include labor. The parts from their OWN parts dept. (injectors, seals and decoupling rings) are $2009.04, their labor is $175 so if my math is correct they’re quoting for 10.5 hours JUST for the injectors

[jkoljo]

If you are worried about hydrolock, you can pull plugs on the affected cylinders, then pull injector connectors and crank it. Cylinders should clear within seconds.

[johnung]

Originally Posted by outofphase

2015 335i xDrive here w/ 70k miles. Went WOT the other night, misfired and went into limp mode with smoke/extreme fuel smell so I immediately shut down and got it towed to the dealer.

Injector #4 failed, #5 and #6 on their way out. Dealer calls me and says it’ll be $4409 to replace all 6. Hell no! Towed back to my place, I’m planning on tackling it myself now. Doing plugs, coils, oil, coolant, and oil filter housing gasket while I’m at it. Bought all the tools I needed and the scanner for coding and a rental since I’m saving so much money lol.

My question is, since 1 (or more) cylinders were flooded with unburnt gas, what’s the best way to get it out without risking hydrolock? I’ve only dealt with this once a long time ago in my CRX, I just pulled the fuse for the pump and cranked it until it died, but this being a DI (and the most sophisticated car I’ve ever owned), I wanted to ask here first. Any tips/advice would be greatly appreciated!

FCP Euro has the entire 6-injector Bosch kit for $708 if you have the EU5 injectors, and $570 if you have the EU6 injectors. It's amazing that some dealers can quote outrageous prices with a straight face.

[BMWILUVU]

Originally Posted by outofphase

I was absolutely livid! Technically it was $3860 for the injectors, $289.99 for fuel intake flush, $259.99 for oil change/engine flush. But the latter two include labor. The parts from their OWN parts dept. (injectors, seals and decoupling rings) are $2009.04, their labor is $175 so if my math is correct they’re quoting for 10.5 hours JUST for the injectors

They know most people aren't going to touch injectors. Don't tell us, tell them. If you can't do the service yourself, talk them down tell them you'll tow to another garage. Service is a business like anything else.

[thejeremyman9]

Originally Posted by outofphase

Still have a little handheld pump I used to use for siphoning oil from old fiat, I’ll give that a shot!



That’s what I was worried about. Doing an oil change after to play it safe.

So if I:

-pull plugs
-suck up as much as I can with the pump
-turn the engine over
-install new injectors
-install oil filter housing gasket
-change oil
-install new coils+plugs

…is that the best order to do things?

As someone else posted above, make sure if you crank the engine with plugs removed you have disconnected the injectors or you are just going to pump more fuel in.

[F32Fleet]

Originally Posted by johnung

FCP Euro has the entire 6-injector Bosch kit for $708 if you have the EU5 injectors, and $570 if you have the EU6 injectors. It's amazing that some dealers can quote outrageous prices with a straight face.

The demands of BMWNA result in a lot of overhead.

[F32Fleet]

Originally Posted by outofphase

That’s what I was worried about. Doing an oil change after to play it safe.

So if I:

-pull plugs
-suck up as much as I can with the pump
-turn the engine over
-install new injectors
-install oil filter housing gasket
-change oil
-install new coils+plugs

…is that the best order to do things?

Prime the oil pump before you restart the car.

https://www.google.com/url?sa=t&sour...Z31cOuwN8uzkC9

[SuperLomi]

Make sure you get new isolators also. And you will need a torque wrench that can read/be set to 2Nm.

[johnung]

Originally Posted by F32Fleet

The demands of BMWNA result in a lot of overhead.

Yes, but that overhead is already built into parts list prices, shop hourly rates and book rate labor times. I'm talking about dealers who rape customers by charging over those rates.

What's even more brutal is that you can pay through the nose and not even get a high level tech. At my local dealership is that they assign techs in the order that cars come in to the service dept, not by their experience level/training with the task to be done. I don't take my car in if it's something simple yet I can get someone inexperienced who mostly does oil changes. Paying an ridiculous rate for someone to learn on the job.

[F32Fleet]

Originally Posted by johnung

Yes, but that overhead is already built into parts list prices, shop hourly rates and book rate labor times. I'm talking about dealers who rape customers by charging over those rates.

What's even more brutal is that you can pay through the nose and not even get a high level tech. At my local dealership is that they assign techs in the order that cars come in to the service dept, not by their experience level/training with the task to be done. I don't take my car in if it's something simple yet I can get someone inexperienced who mostly does oil changes. Paying an ridiculous rate for someone to learn on the job.

Obviously it's not.

[outofphase]

Thanks for the help everyone. 3 injectors down, 3 to go. A bit of advice for anyone who needs to do this in the future: don’t cheap out on the injector puller/installer tool…

I found one on Amazon for $30 that had mostly positive reviews, but it’s absolute garbage and the only reason I haven’t finished. The threads for the injectors are super rough and it’s impossible to thread in two injectors at the same time without damaging threads. The (PLASTIC) spacers collapsed before even reaching 8nm of torque, I had to make my own spacers out of some spare metal pipe I had laying around, and after chasing the threads on the tool 3x, decided I can only do one injector at a time.

/rant Just buy the $200 one and save yourself the headache.

[outofphase]

Injectors have been done for about a week and I’ve driven it a few times since, but the idle is pretty rough on cold starts. It improves once the engine is warmed up but I can tell it’s still slightly inconsistent.

Just put in fresh fuel and some techron, but I’m wondering if I should do a walnut blasting. Any ideas?

[n55david]

Originally Posted by outofphase

Injectors have been done for about a week and I’ve driven it a few times since, but the idle is pretty rough on cold starts. It improves once the engine is warmed up but I can tell it’s still slightly inconsistent.

Just put in fresh fuel and some techron, but I’m wondering if I should do a walnut blasting. Any ideas?

Unless you had a failed pcv there isn't any reason to do a walnut blast. It's not an n54 and not really an issue.. maybe at 300k miles?

[thejeremyman9]

Originally Posted by outofphase

Injectors have been done for about a week and I’ve driven it a few times since, but the idle is pretty rough on cold starts. It improves once the engine is warmed up but I can tell it’s still slightly inconsistent.

Just put in fresh fuel and some techron, but I’m wondering if I should do a walnut blasting. Any ideas?

If you unplug your MAF how's the idle?

[outofphase]

Originally Posted by thejeremyman9

If you unplug your MAF how's the idle?

Never got around to trying it, but the good news is the idle cleared up after going for a longer highway drive and has been buttery smooth since.

On another note, my timing seems all over the place, especially at higher RPM. This log was done with a full tank of Shell V-Power 93. I did NGK 97506's gapped to .020 per Cary Jordan's recommendation for his E30 tune I'm running. Haven't had a chance to log with that tune yet -- wondering if running that plug/gap combo with 93 could be part of the issue? Unless I'm missing something, everything else in the log looks good, other than the stock turbo running out of breath.

https://datazap.me/u/bemdubya/4th-5t....69&tmax=24.53

[thejeremyman9]

Originally Posted by outofphase

Never got around to trying it, but the good news is the idle cleared up after going for a longer highway drive and has been buttery smooth since.

On another note, my timing seems all over the place, especially at higher RPM. This log was done with a full tank of Shell V-Power 93. I did NGK 97506's gapped to .020 per Cary Jordan's recommendation for his E30 tune I'm running. Haven't had a chance to log with that tune yet -- wondering if running that plug/gap combo with 93 could be part of the issue? Unless I'm missing something, everything else in the log looks good, other than the stock turbo running out of breath.

https://datazap.me/u/bemdubya/4th-5t....69&tmax=24.53

There's some timing corrections there but not really to bad. One data log like that i wouldnt be worried about if you have like -5 degrees on one cylinder consistently or -3 or more across all cyliders then i would be worried. The plugs are totally uncessary, but if it's what your tuner wants in there then it is what it is. Did you get a custom tune with stock HPFP?