[nukezero]

my vehicle is still under the 4yr 50k warranty. getting some recall services done.

my SA said they are recommending me do a injector flush because it is "due". What the heck is an injector flush???

is that really even necessary? The way I figured is, if i buy the extended bmw warranty, that covers the injectors. if the injectors were to ever fail, they would replace those based on the warranty.

Plus, they said it isn't covered under the maintenance cost. So then WTF... this "full maintenance" plan is BS then if the dealers/BMWNA is calling for more services than what the maintenance plan entails.

whats next? The next time I go in they're going to say I need a complete engine flush and drain and some exhaust manifold cleaning...but oh, it ain't covered so I gotta pay for it???

[Chriztofor]

Originally Posted by nukezero

my vehicle is still under the 4yr 50k warranty. getting some recall services done.

my SA said they are recommending me do a injector flush because it is "due". What the heck is an injector flush???

is that really even necessary? The way I figured is, if i buy the extended bmw warranty, that covers the injectors. if the injectors were to ever fail, they would replace those based on the warranty.

Plus, they said it isn't covered under the maintenance cost. So then WTF... this "full maintenance" plan is BS then if the dealers/BMWNA is calling for more services than what the maintenance plan entails.

whats next? The next time I go in they're going to say I need a complete engine flush and drain and some exhaust manifold cleaning...but oh, it ain't covered so I gotta pay for it???

Tell them to put it in writing and then write a letter to bmwna. I would also look for another dealer.

[sleepyx637]

which dealer is this?

[halfpast3]

Sounds to me like you already nailed it on the head. The injector flush is being "recommended" by the SA but it is not required and therefore not covered under the maintenance program.

[blacknbean]

what is an injector flush? is that like running techron?

[Chriztofor]

Originally Posted by halfpast3

Sounds to me like you already nailed it on the head. The injector flush is being "recommended" by the SA but it is not required and therefore not covered under the maintenance program.

You didn't read the rest of the sentence. He is recommending it "because it's due."

[cotmfk]

Sounds a little weird.

[Chriztofor]

Originally Posted by cotmfk

Sounds a little weird.

Sounds like a dealer who is trying to make extra money by trying to get around bmw's maintenace policy.

[halfpast3]

Originally Posted by Chriztofor

You didn't read the rest of the sentence. He is recommending it "because it's due."

My bad. I'd side with you then. My SA used to have brochures for the injector flush on his desk (they are gone now) and he said it was a "recommendation" thing and not a requirement.

[Chriztofor]

Originally Posted by blacknbean

what is an injector flush? is that like running techron?

http://www.ehow.com/i/#article_7552841

[Juiced46]

Ok just to clear up some confusion and give you guys some valid information. An injector flush does actually work on high mileage cars. Basically it runs a cleaner through the injectors by a pressurized tank full of the cleaner, and bypassing the fuel pump. It hooks directly to the fuel rails via the schrader valve or @ the fuel line inlet going into the rail. This is not to be confused with injector cleaner you buy @ an autoparts store, that is totally different. I have seen MPG and better running engines but ONLY on higher mileage vehicles. Injectors can get gunked up after time and affect the spray pattern

HOWEVER

Judging by your info you have a 335. This means you have a high press fuel system. Meaning for one they cannot hook an injector cleaner to it if they wanted to. 2- The service writer is either a complete moron and doesnt know you cannot run injector cleaner through the high pressure fuel system, he is going to sell you the service but nothing is actually going to get done (ripping you off) or mistook your vehicle for having a non turbo engine.

In short, no you do not need and injector flush. Tell him to pound sand cause its impossible and not recommended @ all on a High pressure Piezo injector that you are running.

[stressdoc]

BS.that SA

[RobNH]

Originally Posted by Juiced46

Ok just to clear up some confusion and give you guys some valid information. An injector flush does actually work on high mileage cars. Basically it runs a cleaner through the injectors by a pressurized tank full of the cleaner, and bypassing the fuel pump. It hooks directly to the fuel rails via the schrader valve or @ the fuel line inlet going into the rail. This is not to be confused with injector cleaner you buy @ an autoparts store, that is totally different. I have seen MPG and better running engines but ONLY on higher mileage vehicles. Injectors can get gunked up after time and affect the spray pattern

HOWEVER

Judging by your info you have a 335. This means you have a high press fuel system. Meaning for one they cannot hook an injector cleaner to it if they wanted to. 2- The service writer is either a complete moron and doesnt know you cannot run injector cleaner through the high pressure fuel system, he is going to sell you the service but nothing is actually going to get done (ripping you off) or mistook your vehicle for having a non turbo engine.

In short, no you do not need and injector flush. Tell him to pound sand cause its impossible and not recommended @ all on a High pressure Piezo injector that you are running.

Agree 100%, although I cannot speak about not being able to flush a HPF system because I don't have enough experience/knowledge of them.

If you're concerned with the injectors getting gunked up over time, run a bottle of Chevron Techron - detergent based fuel system cleaner once or twice per year. it's $13, or $14 per bottle depending on where you go, but it's one of the best fuel system cleaners out there.

[Blubaron79]

Sorry to side track, but is true you should run techron right before an oil change only??

[RobNH]

Originally Posted by Blubaron79

Sorry to side track, but is true you should run techron right before an oil change only??

That's the first I've ever heard of that.

I can't see the reasoning behind it. The only time I would do that is if I was dealing with a much older car - say....a pre 2000 model year car that needed to have emissions testing. At that point, I would first run a bottle of fuel system cleaner through it - and immediately change the oil before the emissions test since I want any fumes coming out of the tailpipe to be as clean as possible.

I own a 1990 ZR1 Corvette that I put roughly 2,000 miles on it per year. I run a bottle or two of Techron through it per year - but only change the oil once - before it goes into storage for the winter.

[Chriztofor]

Chevron techron is awesome. I had rough idle start-up problems. After a bottle of that stuff in my tank no more rough idle. That was over 8,000 miles ago. I believe it has to do with the fuel filter that is never changed. They get dirty, dirt passes to the injectors, then car idles rough.

[nukezero]

The dealer sent me a report in regards to the fuel injector flush.

this is what it basically says. by the way, it costs a whopping "$240" for this service. I really, really like to know exactly what they are doing.

Are they going to rip apart the piezo electric injectors and stick a wire into it and scrape out the debris??

correct me if I'm wrong but if its "due for a tune-up"... that must be under BMW's no-cost maintenance policy right?

[Chriztofor]

^ Please send this to BMWNA and see what they have to say. Due for tune-up (this is maintenance). It should be free.

[Tag]

Originally Posted by Blubaron79

Sorry to side track, but is true you should run techron right before an oil change only??

Yes. This stuff breaks down carbon and is itself a powerful solvent. Some of it blows past the piston rings into the oil below which in turn affects the oils viscosity. That's why you want to change your oil afterward.

[RobNH]

Originally Posted by tag824

Yes. This stuff breaks down carbon and is itself a powerful solvent. Some of it blows past the piston rings into the oil below which in turn affects the oils viscosity. That's why you want to change your oil afterward.

To the best of my knowledge, Chevron Techron contains little to no solvents - that's why it's detergent based.

[idrift4wd]

i heard those bottle and additives dont even work.

[Tag]

Originally Posted by RobNH

To the best of my knowledge, Chevron Techron contains little to no solvents - that's why it's detergent based.

Source: https://cglapps.chevron.com/msdspds/...docFormat=HTML