The injectors on those....I think.... are notoriously loud. At least that's how it is on my n54. Could be just a noisy injector.

 

I can't speak from personal experience as I have only used this flush once so far when I got my car last November (one time use does not a pattern make), but I don't recall reading about any issues whilst researching across several forums before using it myself. All I can say is, I will be using it again come November this year when my next oil change is due (approx 7,500 miles) as I have no history for this car and I don't trust any and all of the previous owners

 

Short answer. No

Long Answer, it's probably more beneficial to these motors to flush em; particularly with the low tension oil rings.

 

Cleaning mine after carbonization from leaky VCG and plugged dip stick tube drain. Over last few thousand miles: two LM flushes, changed to LM Leichtlauf 5-40, four rapid oil changes, and lots of highway driving. Cleaning up beautifully, zero issues, and running great. I'd also suggest trying the LM Leichtlauf 5W40; very good stuff with a noticable difference to me. Third can of flush ready though not sure it will be needed. GL

 

This is how I used my engine flush before changing from Mobil1 to LM Leichtkauf 5w-40.

 

I use two cans every other 10k-mile oil change in 4 different engines. An M54, M272, N55 and M156. Works as advertised.

 

Be careful ladies and gents with those N54/N55 engines. Oil filter housings need to be prefilled.

 

And NO to the original question.
L-M makes some fantastic oil and work with the German car companies.
All the oil is produced/processed/packaged in Germany.

 

Thanks for that.

The injectors on those....I think.... are notoriously loud. At least that's how it is on my n54. Could be just a noisy injector.

The N52 and N54 are completely different engines. Some of the accessories are common but that's it. The N52 has a well documented lifter problem.

 

Even sea monkeys

I've never used any of this sh

Change oil every 5k,use good oil and filter ,beat on it

 

I have used it on my 06 A4 quattro 2.0t as the engine sounded like a diesel and after a good 500 miles I changed the oil to 10W-40 instead of 5w-40 and I have no more engine noise. I believe it works. Please remember, it takes time for these things to work. If you plan to flush the engine, you will need to let the agent run in the engine for an avg of 500 miles plus but I can tell you it is save on the seals.

 

You are probably talking about the oil saver, which can help recondition the valve stem seals and does take time.
You can run it longer than 500 miles - until your next oil change.

But this thread is about a different Liqui-Moly product - the pro-line engine flush - which is definitely dangerous to drive any appreciable distance with. You are supposed to only use it for a short time while the engine is idling, after which you change the oil...

 

I use only LM products in my 3 BMWs. Used the engine flush followed by the Ceratec treatment last May in the M3. Haven't noticed any ill effects in the meantime, but only have about 2k miles on machine since. FYI though, if you use the Ceratec, be ready for the used oil to look milky. I went to change mine a couple weeks ago and had panic attack thinking it was coolant getting mixed in. I referenced my notes and saw that I had added it, phewwww.

Yes, I change the oil in that machine annually, regardless of mileage. Use the LM 10w-60 in the M, 5w-40 leichtlauf in the other 2 machines.

 

A little off topic but related.

I've never once used an oil system flush in my life. Yesterday I serviced my wife's Kia diesel with a Penrite (Australian very high quality range of oils, great in the E46) oil system flush.

The Kia runs Penrite 0W-30 full synthetic oil at 15,000km service intervals, and still looks reasonably clean on the dipstick at that mileage. I took it for a drive and got it properly hot, added the flush and idled it for 15 minutes. I then switched it off and let it sit for another half hour while I changed the fuel filter.

I drained it down and was pretty much blown away at how black the oil was. Never been like that before, absolutely black as it gets. I let it drain for over an hour to let it all dripped out, fitted a new oil filter and filled her up again. The oil is so clear I can barely read it on the dipstick, and it does seem to be running very smooth.

I will definitely use this same product to flush my E46, as it's using a bit of oil which I suspect is gummed rings after a very messy CCV failure sucked oil all through the intake manifold for what looks like a long time. We have the LM flush here as well, but I think I'll stick with the same brand as the oil I'm using (Penrite 5W-40 full synthetic). I strongly doubt that it's doing any harm.

I wouldn't use a cheap, no name or "home remedy" flush, as that may well use cheaper and more aggressive chemicals that may damage seals or something.

 

how many miles on you car?
I had an engine flush on my previous E60 M54 and the process CAUSED lifter ticks. My car had high mileage and the cleaning resulted in some gunk removed from the cleaner that went trough some lifter oil ducts that clogged.
After my nightmare experienced I readed a lot about on the net and, even if my humble case does not make a statistic, I realized that car that used cleaners regularly/from low mileage hardly had issues, hig-mileage ones had issues like mine more frequently.

in high mileage cars that has already some problems worth a try and in many cases solves too. In a mileaged car with no problems...I learned my lesson

 

I tried to pluck up my courage to do this, but I'm not game:

Ultimate engine flush process, part 1.

A couple of months ago I promised to describe a procedure which chemically cleans engine to pretty much factory condition. It is a very effective process, and it completely frees oil rings, cleans oil drainage holes on pistons, completely disolvess all gunk/lacquer/deposits inside your engine...

www.e46fanatics.com

I wish I'd done it for starters when I first bought the car, before I'd done my OFHG, Vanos seals etc. It would have been a perfect way to kick off a refresh.