So..... THIS happened....

BigBen · 29th April 2019, 08:17

So..... THIS happened.... (re-arrange letters as required!)

On my way to the Aberdare meet yesterday morning I got a mile up the road when Maurice started to sound rough, a few seconds later the "check engine" warning showed up on the display, then disappeared. About 5 seconds later the battery charge light appeared and then the power steering was... well... no longer power assisted!

Aha! I thought - Aux/Fan/Serpentine belt has snapped....

I turned around at the next roundabout and made my way the few miles back home.

Thinking to myself "I'll get a head-start on the job and pull the broken remains out" I poppoed the bonnet and, sure enough, the belt was slack with no tension.

Grabbing the belt and pulling I then hear a noticeable metallic 'thunk' from near the bottom of the engine "What the.. etc" I thought.

Looking down I saw this:-

And here's a close-up I've adjusted the exposure/contrast on for a better view:-

The belt is fine.

Somehow the Crankshaft pulley bolt has unwound and, with my tug of the belt has come out completely bringing with it the crankshaft pulley.

No damage, though I still don't know why/how it's become loose. The last time it was off is nearly 3 years ago when I did the belts, it spins clockwise and I always use 243 when re-assembling.

However, it's a good job this didn't happen on the M50 the other night at 69.9mph...!

victorgte · 29th April 2019, 08:22

Never seen that before. Lucky indeed.
Will be interested to know how/why it happened.

planenut · 29th April 2019, 08:28

Very lucky, but even more so, you seem to know what you are looking at and what to do about it, well done. Most garages would already have diagnosed the need for a new engine.

BigBen · 29th April 2019, 08:48

Quote:

Originally Posted by planenut

Very lucky, but even more so, you seem to know what you are looking at and what to do about it, well done. Most garages would already have diagnosed the need for a new engine.

I can hear them now - "Yeah guv, check engine light.... head gasket, they all do that..."

trikey · 29th April 2019, 10:20

Not seen that before!! They are usually a mare to remove, I’d be checking the internal threads carefully before refitting.

roverbarmy · 29th April 2019, 10:33

I've seen it on a friend's Picasso and you could still see the threadlocking compound on the bolt (recovered from the roadside !). The garage had the idea that the crank thread had oil on it when the bolt was inserted, so that the locking compound could not lock onto the steel.

Sheraton · 29th April 2019, 17:35

Quote:

Originally Posted by BigBen

I can hear them now - "Yeah guv, check engine light.... head gasket, they all do that..."

Are you sure no damage has occurred ? - the Check Engine Light would have me concerned that the Timing was out Causing Misfires - have you checked for Fault Codes ? ........ if the V6 is similar to the k1.8 (Interference Design) - "Potential" Valve and or Piston damage would be something i'd not rule out.

Paul.

BigBen · 29th April 2019, 21:53

Quote:

Originally Posted by Sheraton

Are you sure no damage has occurred ? - the Check Engine Light would have me concerned that the Timing was out Causing Misfires - have you checked for Fault Codes ? ........ if the V6 is similar to the k1.8 (Interference Design) - "Potential" Valve and or Piston damage would be something i'd not rule out.

I'm 99% sure, as it ran faultlessly for the 4 miles or so back home after the battery light came on.

I currently don't have my windows laptop here to fire up TOAF to pull the codes - I'm picking it up from my fathers on Friday so will be checking next weekend when I'm home and actually have time to sort it out (rescued the pulley and bolt and both seem fine, also).

May well be a good idea to check the timing belt tension while I'm at it, to be on the safe side.

BigBen · 13th May 2019, 11:30

Finally got around to sorting the pulley today.

After installing a new genuine serpentine belt I fired him up for the first time in 15 days and he sprang straight into life as usual, purring away. Really missed that V6 sound.

I'd forgotten how annoyingly strong the tensioner is... you really need a 2nd person... but after some muffled expletives I managed to get the belt on with minimal knuckle scraping.

The only codes I had stored were low battery voltage and VIS power open. I did the VIS flap about a year ago (usual spline snap); the low voltage is obvious.

One short test-drive later and I realised after looking in the mirror I had unknowingly developed my biggest grin for at least fortnight.

planenut · 13th May 2019, 12:09

Well done, great to get a result.

29th April 2019, 08:17	#1
BigBen Loves to post R75 V8 Tourer, CDTi Auto Tourer (both Connie SE), MG ZT-T 190+, MG TF 115 Join Date: Feb 2013 Location: Here be Dragons! Posts: 490 Thanks: 106 Thanked 160 Times in 101 Posts	So..... THIS happened.... So..... THIS happened.... (re-arrange letters as required!) On my way to the Aberdare meet yesterday morning I got a mile up the road when Maurice started to sound rough, a few seconds later the "check engine" warning showed up on the display, then disappeared. About 5 seconds later the battery charge light appeared and then the power steering was... well... no longer power assisted! Aha! I thought - Aux/Fan/Serpentine belt has snapped.... I turned around at the next roundabout and made my way the few miles back home. Thinking to myself "I'll get a head-start on the job and pull the broken remains out" I poppoed the bonnet and, sure enough, the belt was slack with no tension. Grabbing the belt and pulling I then hear a noticeable metallic 'thunk' from near the bottom of the engine "What the.. etc" I thought. Looking down I saw this:- And here's a close-up I've adjusted the exposure/contrast on for a better view:- The belt is fine. Somehow the Crankshaft pulley bolt has unwound and, with my tug of the belt has come out completely bringing with it the crankshaft pulley. No damage, though I still don't know why/how it's become loose. The last time it was off is nearly 3 years ago when I did the belts, it spins clockwise and I always use 243 when re-assembling. However, it's a good job this didn't happen on the M50 the other night at 69.9mph...! __________________ S. Wales meets cancelled until further notice [SIGPIC]https://www.the75andztclub.co.uk/forum/image.php?u=23989&type=sigpic&dateline=1467731033[/SIGPIC] Past cars:- BL: Discovery 3.1 & V8 2WD pick-up, Rover 800 Vitesse Turbo Coupe, 820 SLi 180 Fastback, 600ti, Montego 2.0EFi VDP, Ital 1.3 Estate Ford: Transit Cosworth V6, Granada 2.9 V6 Scorpio & 2.8 V6 GL Volvo: 480 Turbo & 1.7 ES, 240 GLE Porsche: 944 2.7 Lux Audi: 100 ESE 20v Peugeot: 405 1.9 GR Talbot: Alpine 1.6 Rapier S Last edited by BigBen; 29th April 2019 at 09:30..

29th April 2019, 08:22	#2
victorgte I really should get out more....... MGTF, MGZT, Range Rover Join Date: Sep 2013 Location: Cheltenham Posts: 2,803 Thanks: 395 Thanked 633 Times in 446 Posts	Never seen that before. Lucky indeed. Will be interested to know how/why it happened. __________________ MG TF 135, MG ZT, Range Rover P38

29th April 2019, 10:20	#5
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Not seen that before!! They are usually a mare to remove, I’d be checking the internal threads carefully before refitting. __________________ Lest we forget..

29th April 2019, 10:33	#6
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	I've seen it on a friend's Picasso and you could still see the threadlocking compound on the bolt (recovered from the roadside !). The garage had the idea that the crank thread had oil on it when the bolt was inserted, so that the locking compound could not lock onto the steel. __________________ Oil in my veins!

13th May 2019, 11:30	#9
BigBen Loves to post R75 V8 Tourer, CDTi Auto Tourer (both Connie SE), MG ZT-T 190+, MG TF 115 Join Date: Feb 2013 Location: Here be Dragons! Posts: 490 Thanks: 106 Thanked 160 Times in 101 Posts	Finally got around to sorting the pulley today. After installing a new genuine serpentine belt I fired him up for the first time in 15 days and he sprang straight into life as usual, purring away. Really missed that V6 sound. I'd forgotten how annoyingly strong the tensioner is... you really need a 2nd person... but after some muffled expletives I managed to get the belt on with minimal knuckle scraping. The only codes I had stored were low battery voltage and VIS power open. I did the VIS flap about a year ago (usual spline snap); the low voltage is obvious. One short test-drive later and I realised after looking in the mirror I had unknowingly developed my biggest grin for at least fortnight. __________________ S. Wales meets cancelled until further notice [SIGPIC]https://www.the75andztclub.co.uk/forum/image.php?u=23989&type=sigpic&dateline=1467731033[/SIGPIC] Past cars:- BL: Discovery 3.1 & V8 2WD pick-up, Rover 800 Vitesse Turbo Coupe, 820 SLi 180 Fastback, 600ti, Montego 2.0EFi VDP, Ital 1.3 Estate Ford: Transit Cosworth V6, Granada 2.9 V6 Scorpio & 2.8 V6 GL Volvo: 480 Turbo & 1.7 ES, 240 GLE Porsche: 944 2.7 Lux Audi: 100 ESE 20v Peugeot: 405 1.9 GR Talbot: Alpine 1.6 Rapier S

29th April 2019, 08:28	#3
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,954 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Very lucky, but even more so, you seem to know what you are looking at and what to do about it, well done. Most garages would already have diagnosed the need for a new engine.

13th May 2019, 12:09	#10
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,954 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Well done, great to get a result.