Question on Turbocharged Engine Timing Chain Guides Replacement

Hi, i think i should just improvise my question - i am just wondering is it possible that i could have screwed up the engine timing by simply rotating the crankshaft backwards probably 180 degrees when the timing chain and oil pump chains are both intact as before?
If not, then i should start looking at the wiring and compression etc.
Would really appreciate a quick answer.
Thanks-Shan

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This post was auto-generated based upon a question asked on our tech article page here: MINI Cooper R56 Turbocharged Engine Timing Chain Guides Replacement (2007-2011) | Pelican Parts DIY Maintenance Article

[Nick at Pelican Parts]

Yes, that can throw timing off if chain is loose.

- Nick