1972 220- Timing Chain removal

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Hartmann - 26 Feb 2005 20:51 GMT

so i finally got the cylinder head seperated, with a good dose of violence.

is it necessary that i seperate the timing chain, as it would catch on the
tensioner, or is there a way to bypass the need to seperate the chain, by
removing the tensioner for instance or some other clever way?

thanks in advance etc.

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Martin Joseph - 26 Feb 2005 21:11 GMT

> so i finally got the cylinder head seperated, with a good dose of violence.
>
> is it necessary that i seperate the timing chain, as it would catch on
> the tensioner, or is there a way to bypass the need to seperate the
> chain, by removing the tensioner for instance or some other clever way?

Usually the chain comes off before the head IME...
You could use a bungie to hold it up perhaps.

I don't know the design of that particular engine.

Sorry,
Marty

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Roffe Berg - 28 Feb 2005 10:40 GMT

> so i finally got the cylinder head seperated, with a good dose of
> violence.
[quoted text clipped - 5 lines]
>
> thanks in advance etc.

To loosen the tensioner you look at the balancer at crankshaft end, there
is a gap the size of a finger, it should be pointed up, inside the
balancer at the gap (in the engine block) there is a hole with 6 mm thread
this bolt is the "hinge" for the chain tensioner.

If you don't pull this out you can not lift the head even if you separate
the chain (which is not necessary )
This is what you should do: take a piece of metal big enough to cover the
gap, bore a 6-7 mm hole in it then take a long 6mm bolt and screw a nut on
it, then put it through the hole in the piece of metal and then screw in
the bolt in the hole in the block until it's bottomed, then screw in the
nut and it will pull out the "hingebolt"

Then you can pull up the tensioner and lift the head, this is the easy
part, the hard part comes when you have to localize the hole in the
tensioner with the bolt when you put it back ( took me 1,5 hour to find
the f.cking hole ) here you need serious patience!

Then lets hope you have kept the timing chain tight and on the sprockets
during all the time or else you may have a serious timing trouble on your
hand, so what ever you do dont crank the engine when you are ready with
your work, take a wrench 27mm on the crankbolt and turn the engine several
revolutions by hand first to make sure you dont break a valve.
If you have more questions mail me ( remove nospam in the mailadress )

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Martin Joseph - 28 Feb 2005 20:34 GMT

> Then lets hope you have kept the timing chain tight and on the
> sprockets during all the time or else you may have a serious timing
[quoted text clipped - 3 lines]
> dont break a valve.
> If you have more questions mail me ( remove nospam in the mailadress )

While it's clear you have more experience with this setup then I do,
it seems insane to do it that way?

I always want to understand and be able to manually setup the sprocket
positions as well as the distributor. Trying to "keep these in place"
is a silly concept as far as I am concerned. Understanding how to line
them up properly gives a much greater sense of confidence and more
consistent results.

Is there no way to get at that 6mm Tensioner bolt you describe?
Perhaps from underneath the car? Or maybe removing the Crank pulley?

Spending an Hour + getting that back together seems rather annoying.

Marty

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Roffe Berg - 01 Mar 2005 20:58 GMT

> While it's clear you have more experience with this setup then I do, it
> seems insane to do it that way?
[quoted text clipped - 11 lines]
>
> Marty

If your patience doesn't hold for an hour then blow the car to pieces,
because it's the only way to do it!
and it's not a tensioner bolt it's a straight piece of rod with internal
6mm thread which acts as the lower
hold for the tensioner.

Why the f.ck are you talking about insane way, silly concept, annoying
etc. when you don't know sh.t??

Before you started to dismantle the engine you should have put the crank
in a position where the timing marks on the cam sprocket aligned with the
mark on the head and the crank aligned with it's mark on the block, then
it's easy if you keep the chain tight and don't drop it.

I was planning to help you with the timing procedure, but i really don't
now anymore you seem to want to cut corners and thats a shame for your
Benz.

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Martin Joseph - 02 Mar 2005 08:03 GMT

> I was planning to help you with the timing procedure, but i really
> don't now anymore you seem to want to cut corners and thats a shame
> for your Benz.

Dude, I am not the one working on my car, I am just commenting.
Sorry you took it so personally, I didn't mean it that way.

Please do continue to help the poor bastard with his head off.

Let us never speak of it again.
Marty

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