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Old 29th September 2009, 21:57   #241
Jules
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No it should have said CDT/i engines as they are identical apart from the Xpart unlock codes to make it 131
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Newbies do now!!
1. Plenum drains..all 3 or 4 year dependent
2. Cooling fan..All speeds functioning
3. Bonnet cable divider block
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Old 29th September 2009, 22:04   #242
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It still strains my ear to rev a CDT diesel above 4000 RPM & will do so even more now
During the MOT emission test (every 2 years over here) Diesel engines will be revved up several times until the engine speed limiter kicks in. Just cruel.
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Old 15th October 2009, 21:32   #243
Dragrad
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Angry Problem discovered..

Think I found the problem........

When we had a look at the engine, opening it up to expose the crankshaft, found that the bolts were extremely tight, had to use the an air ratchet to get them off. All except the two at the end of the engine where the shaft broke.

The shims, at that point were excessively worn, whereas the others were "like new".

So it seems that at some point the bolts had either:-

1. worked loose, or,
2. were never properly tightened at the factory.

Therein lies the root of the sheared crankshaft, so the next time you're under your diesel, check your bolts.
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Last edited by Dragrad; 22nd July 2011 at 23:55.. Reason: typo
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Old 15th October 2009, 21:36   #244
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Indeed GG - your assumption was correct.

My mate reckoned it could have easily have come out of the factory in a weakened state (ie bad casting) and as time went on a fracture started and kept on growing as time and usage went on. Until there was more fracture than metal, so when I dropped into Sports mode and floored it...... The rest is history

Anyway one job for the weekend- put back the Pierburg MAF and Synergy 2
I know cranks look like they are cast but I'm pretty sure they are actually drop forged.
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Old 17th October 2009, 10:37   #245
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Therein lies the root of the sheared crankshaft, so the next time you're under your diesel, check your bolts.

AND DON'T POINT YOUR FINGER AT THE SYNERGY !!!

A not amused.
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Old 17th October 2009, 12:22   #246
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The M47r engine used in the 75 is a "detuned" version of the one they fit into the BMW 3 & 5 series I believe. They won't have changed any engine parts in detuning it, that would have been far too expensive, the easiest-cheapest way to alter it would be to change the ECU set-up. so logically, adding a Ronbox only puts it back to where it was originaly or slightly better. Either way it won't cause any harm to the engine.. :lol:
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Old 17th October 2009, 16:35   #247
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AND DON'T POINT YOUR FINGER AT THE SYNERGY !!!

A not amused.
Ron
Never did OB

In fact just put it back in again today and went for a long drive...... sweet
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Last edited by Dragrad; 17th October 2009 at 23:35..
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Old 17th October 2009, 23:35   #248
Dragrad
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Originally Posted by James.uk View Post
The M47r engine used in the 75 is a "detuned" version of the one they fit into the BMW 3 & 5 series I believe. They won't have changed any engine parts in detuning it, that would have been far too expensive, the easiest-cheapest way to alter it would be to change the ECU set-up. so logically, adding a Ronbox only puts it back to where it was originaly or slightly better. Either way it won't cause any harm to the engine.. :lol:
.
As, indeed, logic dictates That is why I re-inserted it (as well as the PB MAF) today and had a nice long drive. Very nice to have the response from the engine and the power to get out of trouble
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