55K supercharger drain plug confusion.
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CLS55 AMG
55K supercharger drain plug confusion.
So after purchasing the Mobil Jet oil II and handing over everything to do supercharger oil change i was informed half hour later that a butter fingered mechanic had let my drain plug go on an adventure in the engine bay (most probably to the depths of the V or under the blower).
This sadly has not been found and without seeing or having the bolt i cannot get it measured for replacement and Mercedes don't have any information.
Now there are two forum posts that both have different bolts as a solution, one says a 1/8" NPT tapered pressure plug. The other says m10x1.0 pitch plug. The problem is which one is it, they are both scarily close in measurements but only one can be right and only one is tapered that i can find (the m10 is straight). Some people do use a 1/8" NPT in an m10x1.0 situation as a "that'll do" fix.
Can someone please advise which one it is as i am at a dead end at the moment and really don't want to damage the threads, i am currently able to source both a 1/8" NPT and a M10X1.0 (not tapered) from a local hydraulic engineers so its just verification on which.
Thanks in advance for anyone's help
This sadly has not been found and without seeing or having the bolt i cannot get it measured for replacement and Mercedes don't have any information.
Now there are two forum posts that both have different bolts as a solution, one says a 1/8" NPT tapered pressure plug. The other says m10x1.0 pitch plug. The problem is which one is it, they are both scarily close in measurements but only one can be right and only one is tapered that i can find (the m10 is straight). Some people do use a 1/8" NPT in an m10x1.0 situation as a "that'll do" fix.
Can someone please advise which one it is as i am at a dead end at the moment and really don't want to damage the threads, i am currently able to source both a 1/8" NPT and a M10X1.0 (not tapered) from a local hydraulic engineers so its just verification on which.
Thanks in advance for anyone's help
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'06 E55
I guarantee that thing is sitting right there under the blower. I dropped mine in there but was able to get it with a magnetic bolt picker-upper.
Using a different bolt as a temporary quick fix should let you drive around for a while.
Using a different bolt as a temporary quick fix should let you drive around for a while.
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Thanks for the tips, sadly I was there myself for a good hour with a magnet under the blower and the pulley (on that little ledge you think it would hide under) near the oil feeds on the right even into the depths of the v with a magnetic wand. But nothing either the car has eaten the bolt or the mechanic has.
So unfortunately I need a permanent correct fitting bolt. People have used both yet I am struggling to see how a non tapered thread will seal and not just screw all the way through into the charger and am struggling to find a tapered metric thread, unless it is of course 1/8" npt.
I can get the vin later this evening but according to Mercedes the only part listed is an entire supercharger, which is just insane.
So unfortunately I need a permanent correct fitting bolt. People have used both yet I am struggling to see how a non tapered thread will seal and not just screw all the way through into the charger and am struggling to find a tapered metric thread, unless it is of course 1/8" npt.
I can get the vin later this evening but according to Mercedes the only part listed is an entire supercharger, which is just insane.
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'99 and '05 E55 AMG
Potential sizes to fit.
8.4.1 tapered Whitworth pipe thread DIN 2999:
R = outer thread conically, R1 / 8, external thread: taper 1:16, 28 courses / inch, outer diameter 9,728 mm, self-sealing: 0.35 Euro include VAT..
Core hole diameter: 8.566 mm, pitch: 0.907 mm, cylindrical inner thread, hex 5mm, (self sealing but I would use sealing compound)
8.4.2 parallel Whitworth pipe thread (straight) BSPP (British Standard Pipe Parallel)
Pipe threads not threads, sealing compounds, outside = G,
G 1/8, Outside Diameter: 9,73mm, core hole: 8,80mm, 28 courses / inch, pitch 0.907 mm (this one requires sealing compound)
8.4.3 DIN 908-locking screw with head: top
M10x1, for example, Würth, cylindrical, because you could just inferior to a sealing ring (i.e. use a sealing washer)
Above translations from this page:
http://www.hehlhans.de/motorg55-7-3.htm#b803
8.4.1 tapered Whitworth pipe thread DIN 2999:
R = outer thread conically, R1 / 8, external thread: taper 1:16, 28 courses / inch, outer diameter 9,728 mm, self-sealing: 0.35 Euro include VAT..
Core hole diameter: 8.566 mm, pitch: 0.907 mm, cylindrical inner thread, hex 5mm, (self sealing but I would use sealing compound)
8.4.2 parallel Whitworth pipe thread (straight) BSPP (British Standard Pipe Parallel)
Pipe threads not threads, sealing compounds, outside = G,
G 1/8, Outside Diameter: 9,73mm, core hole: 8,80mm, 28 courses / inch, pitch 0.907 mm (this one requires sealing compound)
8.4.3 DIN 908-locking screw with head: top
M10x1, for example, Würth, cylindrical, because you could just inferior to a sealing ring (i.e. use a sealing washer)
Above translations from this page:
http://www.hehlhans.de/motorg55-7-3.htm#b803
Last edited by bbirdwell; Aug 30, 2016 at 02:07 PM.
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CLS55 AMG
Potential sizes to fit.
8.4.1 tapered Whitworth pipe thread DIN 2999:
R = outer thread conically, R1 / 8, external thread: taper 1:16, 28 courses / inch, outer diameter 9,728 mm, self-sealing: 0.35 Euro include VAT..
Core hole diameter: 8.566 mm, pitch: 0.907 mm, cylindrical inner thread, hex 5mm, (self sealing but I would use sealing compound)
8.4.2 parallel Whitworth pipe thread (straight) BSPP (British Standard Pipe Parallel)
Pipe threads not threads, sealing compounds, outside = G,
G 1/8, Outside Diameter: 9,73mm, core hole: 8,80mm, 28 courses / inch, pitch 0.907 mm (this one requires sealing compound)
8.4.3 DIN 908-locking screw with head: top
M10x1, for example, Würth, cylindrical, because you could just inferior to a sealing ring (i.e. use a sealing washer)
Above translations from this page:
http://www.hehlhans.de/motorg55-7-3.htm#b803
8.4.1 tapered Whitworth pipe thread DIN 2999:
R = outer thread conically, R1 / 8, external thread: taper 1:16, 28 courses / inch, outer diameter 9,728 mm, self-sealing: 0.35 Euro include VAT..
Core hole diameter: 8.566 mm, pitch: 0.907 mm, cylindrical inner thread, hex 5mm, (self sealing but I would use sealing compound)
8.4.2 parallel Whitworth pipe thread (straight) BSPP (British Standard Pipe Parallel)
Pipe threads not threads, sealing compounds, outside = G,
G 1/8, Outside Diameter: 9,73mm, core hole: 8,80mm, 28 courses / inch, pitch 0.907 mm (this one requires sealing compound)
8.4.3 DIN 908-locking screw with head: top
M10x1, for example, Würth, cylindrical, because you could just inferior to a sealing ring (i.e. use a sealing washer)
Above translations from this page:
http://www.hehlhans.de/motorg55-7-3.htm#b803
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CLS55 AMG
look at post 91 in link
https://mbworld.org/forums/w211-amg/...filling-4.html
https://mbworld.org/forums/w211-amg/...filling-4.html
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CLS55 AMG
look at post 91 in link
https://mbworld.org/forums/w211-amg/...filling-4.html
https://mbworld.org/forums/w211-amg/...filling-4.html
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'99 and '05 E55 AMG
R 1/8" is tapered. G 1/8" is parallel. Post #91 in the post above links to the exact info I did. Highly recommend bookmarking that site and exploring it in depth.
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Some sort of thread damage?
If this isn't the case I'll be safe to go ahead with my 1/8" npt in theory
I change my sc oil twice in a couple of month time span,, the second time the fill plug did not seem to anchor in as much as before (guessing the aluminum stretched some) put some Teflon tape on it or some thread seal and you should be good either option
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CLS55 AMG
That's a good call I have both the 1/8" npt and m10x1.0 on the way so with some thread lock and some careful tightening it would appear both are up for the job. Thanks for the idea
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CLS55 AMG
Here is the original link referencing where I got the m10x1.0 measurement from
http://www.mbclub.co.uk/forums/amg-l...in-bolt-4.html
Also 1/8 tapered is mentioned earlier on as well.
http://www.mbclub.co.uk/forums/amg-l...in-bolt-4.html
Also 1/8 tapered is mentioned earlier on as well.
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Right bit of a failed attempt tried a 1/8" npt, a r1/8" as listed and a m10x1.0 pitch
Only one I had success with was the r1/8" and it bit with one thread then started to strip it
Seems too large to fit in properly any ideas?
Only one I had success with was the r1/8" and it bit with one thread then started to strip it
Seems too large to fit in properly any ideas?
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It seems rather right the first thread of the bolt barely bites and then just sticks, I'm using a ball ended Allen key for full leverage and just cannot seem to get it to go home. Once the first thread has bitten there doesn't seem enough room for the bolt actually thread in as if the diameter is too big.
Is this usual?
Is this usual?
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R1/8" fitted in the end, maybe there was some damage to the thread from the initial mechanics attempt but got it straight as possible lined it up and started to thread it,
Got some force behind and just kept cranking, bolt tightened up to a point where it is solid in and not seeping oil whatsoever, so I'll keep an eye on it but job done.
For some reason it doesn't seem a "delicate" procedure and you actually have to be pretty forceful and brutal to get it back in.
Thanks for all the advice, and as stated the aluminium is soft enough that I actually think the bolt cuts its own thread.
Got some force behind and just kept cranking, bolt tightened up to a point where it is solid in and not seeping oil whatsoever, so I'll keep an eye on it but job done.
For some reason it doesn't seem a "delicate" procedure and you actually have to be pretty forceful and brutal to get it back in.
Thanks for all the advice, and as stated the aluminium is soft enough that I actually think the bolt cuts its own thread.
