The 75 and ZT Owners Club Forums - View Single Post - Crank turned backwards by mobile mechanic

Mike Noc · 17th December 2018, 21:35

On some chain driven diesel engines it can be a problem - IIRC Mercedes Benz had non ratchet hydraulic tensioners on the cam chains on some engines, and if turned backwards all the slack built up in the wrong place allowing the chain to jam or the valves to hit the pistons.

Haven't heard of any similar problems with the M47R, and I'd be amazed if there were given there are two separate timing chains on our engines, but if the OP has been told similar damage has occurred then worth carrying out a compression test.

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17th December 2018, 21:35	#4
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,567 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	On some chain driven diesel engines it can be a problem - IIRC Mercedes Benz had non ratchet hydraulic tensioners on the cam chains on some engines, and if turned backwards all the slack built up in the wrong place allowing the chain to jam or the valves to hit the pistons. Haven't heard of any similar problems with the M47R, and I'd be amazed if there were given there are two separate timing chains on our engines, but if the OP has been told similar damage has occurred then worth carrying out a compression test. . Last edited by Mike Noc; 18th December 2018 at 08:23..