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#Post#: 64930--------------------------------------------------
Sachs Dolmar 166 picture story
By: Bitburger Date: November 15, 2015, 7:21 am
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Hi Guys,
rainy days, still office work to do, time to present a project
that recently got finalized.
I am finally going to present my Dolmar 166. I am “collecting”
the old Dolmar since 2007,
however it took a while to get a 166. Got it early 2014,
however, I did not have much time
at home so far and therefore it took a little longer.
The 166 was not my favorite, although it might be considered as
the most desirable Sachs-Dolmar
besides the KMS4. Therefore I was not biased and will add a few
remarks at the end.
I picked it up at a friend’s house during my stay in late summer
2014:
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/1arsf1kg9mp.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/2xu46q317rg.jpg[/img]
Back in those days, I just did a cleanup and put some paint on
the scratching marks. I use “alkyd” resin
paint for all of my saws. This type of coating is almost a
hundred years old and takes up to several months
for a complete polymerization while exposed to air. The good
thing is, it is a very thick paint that forms a
very resistive coating that always stays a little soft and
handles mechanical force very well.
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/32w8rn61mxo.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/48wovmdeysk.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/54n8qkg290u.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/66ni432mcdz.jpg[/img]
I fixed a leaking hose stem, pieces of silicon rubber told me
about a former attempt. Well, degreasing is
very important, such as a good silicon compound, in this case
„Reinzosil“!
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/7u0zg9mltkv.jpg[/img]
MoS2-Grease for the worm…
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/8rfm67nqybs.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/91vx8mrndlu.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/112gyrnzcwi3.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/125hvapenl28.jpg[/img]
This cover fort the oil pump is not a bad invention…
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/13kt5r4oamfw.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/14lp3nmdv1o5.jpg[/img]
Well, black bolts, doubled disk, bolt strength class
12.something, I bet they came from an Echo!
Let’s go back to a new set of the original ones, 8.8 and
electroplated. A black detail will be added later!
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/158bdtic26gx.jpg[/img]
The starter was not fully complete and quite worn; I still had a
very nice one for Dolmar 153. The insets
are the same so I just exchanged the whole inset. That powerhead
and myself have the same year of
construction which is pretty nice…
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/16kydt2egjw7.jpg[/img]
Looks not too bad by now...
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/17obwx1n04pc.jpg[/img]
Hood polished...
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/18xhn8jbp5ov.jpg[/img]
Let’s add a few very nice gimmicks now! I still got a brand new
nylon air filter, the old “roboflock” got exchanged.
Such as the original log spikes, the outer one was quite bent
and their finish was partly gone. I got a pair of
aftermarket spikes from the US. Their quality is mind-blowing,
they even have a little “nose” at the top, so that
they “clamp” into the paint of the saw. That means, they hold
themselves while the bolts get assembled!
That’s smart! I do not mind that they are coated, let’s see how
the black spikes will look like.
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/198tbxp4ocqi.jpg[/img]
Finally, two very very special bar nuts from a very good friend:
Might be from the late 70’s, they consist of two parts.
Their socket sits on the sprocket cover, an inset moves freely!
This way they never grind on the paint! Such a
nice piece of machinery from such a long time ago! I wish they
would offer sth. like this today! Well, the
emotional value of that saw gets higher and higher.
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/200wnmdry782.jpg[/img]
Already looks quite badass!
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/21otxbv5d134.jpg[/img]
Piston has some signs of use, but all within normal range
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/22n64vyu3qxj.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/23bl68cu4f73.jpg[/img]
The muffler, however, caused some headache. I had to solder all
the way around. A washer had been used to
cover a small hole at the inner side of the bottom bolt. I
soldered this washer as well, to get it gas-tight.
Although I filed as good as I could, this additional washer
requires a second muffler gasket to level it out!
This was not the case in the past and those parts where heavily
twisted. At least, the threads survived,
I think I spotted one helicoil in the cylinder but that’s fine.
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/24zd18uxv9bt.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/26w71tecfnq4.jpg[/img]
The lower bolt holding the muffler was too long. I do not know
how this could ever have fit, maybe there
where a few more washers on the outside that I forgot after I
disassembled it month ago
Since I never worked on a 166, I could not believe that I would
have a third of those muffler bolts.
While browsing my bits and pieces, I found one, right on top of
some Dolmar 112-parts I once got
as freebees! That turned out to be very cool!
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/252zpvuynhar.jpg[/img]
Here I had to stop for now, as I said the bolts fort the bar
need replacement. Their base is quite damaged,
for whatever reason. Fortunately, their seat and the threads in
the crankcase itself are still ok and will
hold a new set that has to be glued in properly. I also needed a
sprocket in .404, it came with 3/8.
I really like those black spikes!
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/27xj7mwpdrhq.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/28w4yoeizsf9.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/29rhj1esqxpg.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/30b73t56o92r.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/318jdiupfxet.jpg[/img]
[img width=600
height=450]
(HTM) http://www.fotos-hochladen.net/uploads/326voefm8x0b.jpg[/img]
and now the work that was done in summer 2015 and finished a few
weeks ago:
ok, here comes the update. Took a little longer, finally I fixed
all those little things.
Beeing almost a 2 year project, I am very happy now that
everything worked fine,
and I also was quite surprised what a beauty the 166 actually
is. The same proportions
such as the 119 and 133, considering the "design-ratio" between
orange and black!
Not a joke, just compare to 114 and 153, they look different.
119, 133 and 166
just look the same, a linear scaling in overall size!
As I wrote above, in January I still had to exchange the bar
studs and to find a new rim sprocket.
This has been done in May and worked nicely, lots of "loctite"
and a smooth amount of torque:
New studs:
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/1vsdy6r25fn.jpg[/img]
New sprocket:
[img width=600
height=455]
(HTM) http://img5.fotos-hochladen.net/uploads/2k1oz7wh0e3.jpg[/img]
The 166 is one of a few saws that actually look very nice even
without an engine cover:
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/4cz7el3xf5k.jpg[/img]
But now it comes to the tough part. It was already obvious that
someone has tried to "repair"
a few things using some copper-colored kind of silicone rubber
and all kinds of bolts.
The compression was not THAT great and after a nice chat with a
friend, also concerned about
his 166 that still needs work, I decided to take down the
cylinder...now look at that:
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/57vamtro28d.jpg[/img]<br
/>
can you see it? The clip that holds the piston bolt ?
here with some help, the actual ring gap is between the green
lines!
That means that one end of the rings fully sits in the
"removal-nut" at 3 o'clock (red lines!).
This is a very dangerous situation since the ring can come off
at high rpm!
It must be positioned at 6 or 12 o'clock instead!
[img width=600
height=452]
(HTM) http://img5.fotos-hochladen.net/uploads/5b4n639wesgq.jpg[/img]
Needless to say that the crankcase was full of black sticky
parts of the old
cylinder gasket, it already had been removed once and re-glued
with...yes, additional
silicone rubber.
However, the rod bearing looks very nice! Another Achilles heel
of the 166, here everything is in great shape
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/6p5zfu8o9vb.jpg[/img]
Having cleaned the piston as well (the black sticky gasket stuff
also made it in the ring nut)
there is another tiny detail to find: If you look very carefully
at that piston skirt, the score
on the front-left already starts on top of the piston! This was
not caused by dirt or some oil carbon!
In fact, someone has once used a bar of metal to bloc the piston
and caused some deformation of
the top edge of the cylinder outlet! Almost impossible to see by
eye, the piston was able to tell
what caused the issue.
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/7zeyd8tr2bp.jpg[/img]
So I did my first "port-job" to remove any elevated areas
closely above the outlet-edge :
[img width=600
height=450]
(HTM) http://img5.fotos-hochladen.net/uploads/8jpnsefm51i.jpg[/img]
And btw, backfire while starting is not always a sign of a
badass-saw, sometimes it needs
a new key for the flywheel!
Lets sum up:
The piston clip,
the piston rings (aftermarket, the black traces are the remains
of a former gasket where pieces fell into the crankcase),
outlet edge and
flywheel key
required some additional action because someone messed it up in
the past!
[img width=600
height=452]
(HTM) http://img5.fotos-hochladen.net/uploads/9qn45hr0lum.jpg[/img]<br
/>
lets better go with these guys:
[img width=600
height=452]
(HTM) http://img5.fotos-hochladen.net/uploads/109xnueqrbj8.jpg[/img]
In fact, the compression is very nice now! Most likely the
effective ring-tension
was lowered by those sticky residuals of a former gasket and
this edge-deformation!
Fired up right away, no backfire.
Again some more work, also had to exchange the tank due to major
leakage of gas...no pics because at this point,
I actually got pi...d! Seems that I was a bit optimistic on the
first glance, I actually did not expect so many issues.
Maybe its just me (picky!) or maybe not...
While spending lots of time, I even got a new starter in
between, as well as a decal
for the sprocket cover. This time, I actually drove the saw to
some places to take pictures.
It has been 5 years that I actually put so much effort in just
making some pics in the end, but in this case
it was worth it. That is a real beauty and a hell of a saw! Now
I have some options for my screensaver :
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/11wfg5yjitba.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/12g3abu4yd20.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/13hyij6e3um5.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/148synw6e4az.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/1685vuj1pxcy.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/17kzbpw56f3l.jpg[/img]
[img width=600
height=398]
(HTM) http://img5.fotos-hochladen.net/uploads/186wbt20eogf.jpg[/img]
Concluding remarks: I only knew the 166 from the web and of
course I was VERY curious.
I even would say, the expectations were almost too high. Well,
describing the character of
a 166, I somehow always thought that they were from 1985 and
later. Now I learned that
the 166 was released much earlier, this one e.g. is from 82.
This is pretty close to the
112-114-119-complex that was released in 1978. From that
perspective it is quite
remarkable that the saw felt so much different. The heavy and
unique Dolmar-feeling of
a 153 or even a 119 is completely gone. It feels much lighter
and somehow quite advanced.
Indeed I always had the impression that I was working on a
120si. It just does not "feel" like
a "pure" colleague of 114 and 119!. It just seems to be in the
same row as the later 115 and 120si.
A explanation could be that the 166 replaced the CT that was
already sold since the 60ies. It even
was the upper end of the model palette at a time where the
middle-class had already been replaced
twice (CA and CC by 122, 144 and later by 123, 133, 152/153).
Maybe replacing the old CT was
prioritized for the European market before the 114/119 finally
got replaced by the “modern” saws
such as the 115 that is still in production.
Last but not least, two technical details appear quite strange.
First of all, the cooling fins are quite
coarse and small. Compared to a Stihl 070 it looks like a very
minor cooling capacity. The fan is huge;
however, I do not think that they were sufficient to reliably
cool the 118 cc-combustion. Is this the
reason why so many 166 nowadays have scoring?
Second, the manifold between carburetor and cylinder is already
made from rubber. I think it is even
the only Sachs-Dolmar that has such a modern concept, normally
used to damp the carburetor against
the vibrations of the engine. Regardless of this novelty, the
carburetor itself is assembled to the crankcase
using a very massive construction of solid metal. I think this
reverses the desired effect of damping;
it should have been assembled to the vibrational isolated part
of the saw, such as the tank, that is right underneath…
In my opinion, those kind of “features” (don’t call it issues)
are very typical for Sachs-Dolmar and
make this label so charming when comparing to brands that were
“just perfect”
hope you enjoyed the thread :)
#Post#: 64931--------------------------------------------------
Re: Sachs Dolmar 166, picture story
By: aclarke Date: November 15, 2015, 8:27 am
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Very nice. Thanks for sharing the details.
#Post#: 64932--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: Chainsawrepair Date: November 15, 2015, 8:38 am
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Super nice work and thread.
I have been all through those too. Even split the oil and gas
tanks to seal one once.
#Post#: 64937--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: mgr Date: November 15, 2015, 8:59 am
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Wow very nice 166!! Thanks for the pics. ;)
#Post#: 64956--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: 3000 FPS Date: November 15, 2015, 9:26 pm
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Nice looking saw. Great pictures and narration. Are you
planning on doing any wood cutting with it or keep it for a
pristine example of that model.
I have a 119, the saw runs great and is in pretty good shape.
#Post#: 64983--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: mcbob Date: November 16, 2015, 3:25 pm
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As nice as the Dolly 166 is there's nothing better than the
McCulloch SP118
Here with the rest of the bunch
I'm a idiot and removed the pic.
#Post#: 65744--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: Uncle Lee Date: November 30, 2015, 7:20 pm
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Very nice job Bitburger. The 166 is my all time favorite saw.
Don't know why but i just love em. The spike is a spike i
designed
and sent the sketch to Bryce Stott "custom chainsaw parts on
ebay"
I took an original and straightened the tips out. It's a very
good spike
i just wish he had them coated the original color instead of
black.
Lee
#Post#: 67771--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: jcsmith Date: January 6, 2016, 11:10 pm
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That is sweet. Awesome photography as well. I've been wanting a
166 for quite a while. Maybe one day I'll find one. Love the
attention to detail. Would love to hear it run
Chris
#Post#: 67873--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: sharkey Date: January 9, 2016, 3:12 am
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Nice work Bit. Are you going to run it?
#Post#: 69845--------------------------------------------------
Re: Sachs Dolmar 166 picture story
By: Bitburger Date: February 28, 2016, 11:29 am
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Hi Guys,
thaks for your comments!
No, I guess I won't let it run anymore. At least until
I might have a few spare parts, not sure what part might be the
most crucial?
wow, Lee, it was you who designed those spikes ?
That is just amazing, glad that you told me about that!
A blessing from the Godfather of 166, attached to my old saw,
that's awesome.
Bought a lot of bits and pieces from that shop while still being
in the States.
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