M180 with a single row timing chain, why double row?

Hi,
I've just gotten myself a M180 engine but it has a single row timing chain, while another M180 I have has a double row chain.
Does anyone know why Mercedes used a single row chain and why a
double one?
Can I replace the single by a double if I change the sprocket wheels as well?
-- Martijn
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A double row chain is stronger than a single chain and therefore less likely to break. The 3.8L V-8s of the early '80s had single chains but these motors had the space so double chains could be retrofitted - and usually were. I cite that old V-8 because I don't know what a M-180 is.
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The M180 is a 6 cylinder inline engine, around 1970, for example in the W114 and so on.
But, would it break easily? Under what conditions? Should I replace it by a double chain?
-- Martijn
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Most owners don't want their pistons smashing into their valves when the chain breaks.
Why do you think new motors have double chains when a single chain will do?
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Only 8 postwar models used a single row chain:
    http://articles.mbz.org/engine/gas/chains /?
They were not particularly wonderful. If you can afford to upgrade to double row by all means do so - if the rest of the car is worth keeping.
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keeping.
I only have the engine, but I do have plenty of spare parts from other M180 engines (M180.928).
Would I be able to use those parts to replace the chain.
In this particular setup, I will not go 175 Km/h, only about 90 max, but I will use it in a heavier vehicle.
-- Martijn
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I don't know for sure. If you have a dealershi p with a decnet parts guy he can probably give you he list of parts and from that you should be able to figrue out what ones you already have.
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Well some parts are the same (eg: intermediate shaft from oilpump etc), but others seem to have slightly different numbers but have been replaced by ones that look alike. I think that the bushings are the same but haven't put them next to one another yet.
Might give it a go, there seems to be space enough for it.
-- Martijn
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