:surrender:when crank my s500 in the morning or after it has been sitting for over 8 hrs i would hear this tapping noise it would go away after car has run for a while i was told to put gas treatment in it it stop but it has returned could someone give me some help on this:surrender:
tapping noise
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Has this started after an oil change? If so what weight oil did you use? How quickly does it go away after the car has been started? What is the temperature outside when starting/storing the car? What type of fuel do you use in the car? Does it only happen when you first start the car and go away after a few moments, or does it appear while driving the car?
I've seen a lot of these build up sludge in the oil passages... the extended oil change intervals are pretty optimistic on Mercedes part and are based on using the correct oil specified. if anyone ever used incorrect oil & tried to run the extended intervals on oil changes then sludge buildup is pretty likely. the oil passages to the lifters in the rocker arms are very small & are easily partially blocked, causing it to take a while on startup for the oil to pump up the lifters.
I'd recommend an oil flush followed by an oil change with the correct specified weight synthetic & adding a lucas oil treatment, then a few more frequent oil changes to help clear up the oil passages. I'd also recommend not going much further than 5k miles between oil changes regardless of Mercedes recommended extended intervals.
I'd recommend an oil flush followed by an oil change with the correct specified weight synthetic & adding a lucas oil treatment, then a few more frequent oil changes to help clear up the oil passages. I'd also recommend not going much further than 5k miles between oil changes regardless of Mercedes recommended extended intervals.
+1 on lifters tapping on a cold start up.... this is somewhat "normal" unfortunately but some folks have used a motor cleaner/flush such as SeaFoam and other brands with sucess, and then use a lubricating additive such as Lucas or Zmax to try and keep the noise to a minimuim.
And per turbocad6's mention, 5K between oil changes MAX (personally) and all I use is Mobil One 0W40 per the very discussed and debated MB spec sheets
And per turbocad6's mention, 5K between oil changes MAX (personally) and all I use is Mobil One 0W40 per the very discussed and debated MB spec sheets
I used gunk brand engine flush. it's similar to kerosene which could also be used. some even use transmission fluid. I used 2 quarts because we have much more than 5 quarts capacity. the instructions say to just run at idle for 10 minutes & dump the oil, I ran for 15 minutes & also rev'd it slightly to 2,500-3,000 rpm to help break down deposits.
after dumping the oil from the flush I filled with inexpensive oil & a double sea foam treatment and another aditive that claims to free up stucky lifters & rings.... run that for 1,500 miles or so then dump & fill with 7 quarts of the good stuff & one quart of lucas synthetic additive.
before this treatment my S500 came to me clacking like a diesel. it was so bad that some of the lifters were just collapsed and I had steady misfires on 3 cylinders. it barely ran and it ran like crap. I was at the point of deciding weather I wanted to buy all new rocker arms & do the huge job of replacing them or just buy a junk yard engine because it just seemed like the motor was really screwed up, but then I decided to try flushing first...
after this flush treatment then the aditive cycle and some time, my S500 now runs like a baby... the engine is now dead silent & runs like brand new, really runs strong... the clacking at startup got less & less until it just went away completely
now I'll run a lucas with every oil change of mobil 1 0w40 for ~5k miles each & then every third or forth one will get another seafoam treatment.
I'm also a big believer in sea foam in the fuel system. I'll run a highly concentrated mix through a low tank once in a while & blast it with some full throttle runs, really cleans up the injectors valves and combustion chambers of carbon deposits and also helps eliminate carbon deposits from forming, mine was a little rough until a few good fuel system clean outs too, cleans the fuel injectors nicely
after dumping the oil from the flush I filled with inexpensive oil & a double sea foam treatment and another aditive that claims to free up stucky lifters & rings.... run that for 1,500 miles or so then dump & fill with 7 quarts of the good stuff & one quart of lucas synthetic additive.
before this treatment my S500 came to me clacking like a diesel. it was so bad that some of the lifters were just collapsed and I had steady misfires on 3 cylinders. it barely ran and it ran like crap. I was at the point of deciding weather I wanted to buy all new rocker arms & do the huge job of replacing them or just buy a junk yard engine because it just seemed like the motor was really screwed up, but then I decided to try flushing first...
after this flush treatment then the aditive cycle and some time, my S500 now runs like a baby... the engine is now dead silent & runs like brand new, really runs strong... the clacking at startup got less & less until it just went away completely
now I'll run a lucas with every oil change of mobil 1 0w40 for ~5k miles each & then every third or forth one will get another seafoam treatment.
I'm also a big believer in sea foam in the fuel system. I'll run a highly concentrated mix through a low tank once in a while & blast it with some full throttle runs, really cleans up the injectors valves and combustion chambers of carbon deposits and also helps eliminate carbon deposits from forming, mine was a little rough until a few good fuel system clean outs too, cleans the fuel injectors nicely
my first question is you said that you used 2 quarts while doing the first flush but didn't specify if you that was all you used. it confused me a bit. i would like to try this out but just making sure that i do it right. the other question was what kind of "cheap" oil did you use and the weight. cause i thought we were only allowed to use the Mobil 1 0-40? and last but not least what was the name of the other additive you used to free up sticky lifters. thanks in advance for your response. very good write up.:thumbsup:I used gunk brand engine flush. it's similar to kerosene which could also be used. some even use transmission fluid. I used 2 quarts because we have much more than 5 quarts capacity. the instructions say to just run at idle for 10 minutes & dump the oil, I ran for 15 minutes & also rev'd it slightly to 2,500-3,000 rpm to help break down deposits.
after dumping the oil from the flush I filled with inexpensive oil & a double sea foam treatment and another aditive that claims to free up stucky lifters & rings.... run that for 1,500 miles or so then dump & fill with 7 quarts of the good stuff & one quart of lucas synthetic additive.
before this treatment my S500 came to me clacking like a diesel. it was so bad that some of the lifters were just collapsed and I had steady misfires on 3 cylinders. it barely ran and it ran like crap. I was at the point of deciding weather I wanted to buy all new rocker arms & do the huge job of replacing them or just buy a junk yard engine because it just seemed like the motor was really screwed up, but then I decided to try flushing first...
after this flush treatment then the aditive cycle and some time, my S500 now runs like a baby... the engine is now dead silent & runs like brand new, really runs strong... the clacking at startup got less & less until it just went away completely
now I'll run a lucas with every oil change of mobil 1 0w40 for ~5k miles each & then every third or forth one will get another seafoam treatment.
I'm also a big believer in sea foam in the fuel system. I'll run a highly concentrated mix through a low tank once in a while & blast it with some full throttle runs, really cleans up the injectors valves and combustion chambers of carbon deposits and also helps eliminate carbon deposits from forming, mine was a little rough until a few good fuel system clean outs too, cleans the fuel injectors nicely
yes, first flush I just added 2 quarts of gunk engine flush straigh to an already well warmed up engine. I did not remove any oil from the crankcase & I didn't notice any excessive foaming from windage, your only running it at idle for 10-15 minutes anyway so no real harm in the level being a bit high for this part of the cycle.
the cheap oil I used after the flush for further cleaning was still a synthetic but was maybe quaker state or penzoil or something... not garbage, but not mobil 1 either because I was only using it for a short while in the cleaning process. there will be no harm done from using a cheaper oil for this short period of time. I honestly don't remember exactly which oil additive specifically I used, but it was a name brand off the shelf product specifically targeted at freeing up sticky lifters & rings. I wouldn't be over critical as to exactly which one I used, there are several name brand products such as these & they all pretty much can do the job really.
the cheap oil I used after the flush for further cleaning was still a synthetic but was maybe quaker state or penzoil or something... not garbage, but not mobil 1 either because I was only using it for a short while in the cleaning process. there will be no harm done from using a cheaper oil for this short period of time. I honestly don't remember exactly which oil additive specifically I used, but it was a name brand off the shelf product specifically targeted at freeing up sticky lifters & rings. I wouldn't be over critical as to exactly which one I used, there are several name brand products such as these & they all pretty much can do the job really.
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