broken crankshalf
Submitted: Sunday, Aug 28, 2005 at 12:16
ThreadID:
25936
Views:
2664
Replies:
10
FollowUps:
6
This Thread has been Archived
pt109
i have a1997 disco tdi just had timing belt a/c belt and fan belt replaced and afew other things done by a rover specialist hav driven about 1000ks pulled up at a set of lights loud tapping noise
sump taken off broken crank shalf at front of first piston?
any one any clues????
Reply By: 4runner - Sunday, Aug 28, 2005 at 13:07
Sunday, Aug 28, 2005 at 13:07
It is very unusual for a crankshaft to break , and this is the first time I have heard of a disco tdi crank breaking. The only possible cause is that it could have been a dud from day one. You dont mention how many Km your vehicle has covered and whether any undue load has been placed on the motor, but even so it still should not have broken unless it was out of balance. Sorry I cant be more helpful, but having worked in the trade overseas with Rover cars and 4x4s, its the first case of hearing about a tdi crank breaking.
AnswerID:
127179
Follow Up By: pt109 - Sunday, Aug 28, 2005 at 13:26
Sunday, Aug 28, 2005 at 13:26
185000kms no load
FollowupID:
381714
Reply By: muzzgit (WA) - Sunday, Aug 28, 2005 at 13:23
Sunday, Aug 28, 2005 at 13:23
I had a petrol 60 series landcruiser which had a broken crankshaft in a recon engine. Crank was replaced and engineering company said it may have been a dud from the begining but lasted long enough to be reconditioned and do another 10,000 k's before letting go. Kinda like that big plane crash in the USA where it turned out to be a tiny grain of sand size fault in a cast iron turbine component that lasted 11 years in the plane before finally letting go.
Doesn't help yor cause any but my two bob's worth.
I do know that crank shafts don't like being lugged at low revs.
AnswerID:
127182
Reply By: 4runner - Sunday, Aug 28, 2005 at 13:45
Sunday, Aug 28, 2005 at 13:45
I guess, depending on your budget it would be a case of drop the motor, turn it upside down , remove the broken crank and replace with a new one. If the piston and other internals are still good for another 200,000 Km that will save you mega $$$$$ or worst case scenario is to get a fully reconditioned motor. You are caught between a rock and hard place. Personally, I would replace the crank, seals ,bearings and gaskets, and then think about trading it in.
AnswerID:
127186
Reply By: garrycol - Sunday, Aug 28, 2005 at 13:51
Reply By: Eric from Eric Christopher Wholesale Vehicles - Sunday, Aug 28, 2005 at 17:08
Sunday, Aug 28, 2005 at 17:08
Sounds to me like someone has overtightened the cam belt or fan belts , very un usual to snap crank shaft , but i would be chatting to Rover spescialists
AnswerID:
127199
Reply By: pt109 - Sunday, Aug 28, 2005 at 18:32
Sunday, Aug 28, 2005 at 18:32
my first thoughts were that they must have done something while carring out the other repairs but how can it be proven that it was their wokmanship.if they carryout the repairs they are going to drop the gear box (new clutch seals etc!!!!!) and put a new crank shalf etc in without taking the motor out.
AnswerID:
127209
Reply By: kesh - Sunday, Aug 28, 2005 at 18:45
Sunday, Aug 28, 2005 at 18:45
Bit of a worry here. You have an engine still running, loud tapping noise, "broken" crankshaft? So what is rotating the the camshaft, injection pump? They are driven off the front of the crank I believe, or was it only "nearly" broken?
Can understand the need for timing belt, aux. drive belts being replaced, but perhaps the problem lies within the "few other things" being done?
AnswerID:
127213
Follow Up By: pt109 - Sunday, Aug 28, 2005 at 19:47
Sunday, Aug 28, 2005 at 19:47
Timing kit,lift pump,replaced rear brake disc,changed rocker cover gasket,degreased engine,cooling system brass pluges,front and rear brake pads,front hub seals,oil cooler pipes,donut coupling a/c belt,tighten rear propeller shalf.Three days later fan belt and tensioner replaced.Total mileage done between repairs and knocking noise about 800/1000k
FollowupID:
381741
Follow Up By: angler - Sunday, Aug 28, 2005 at 20:10
Sunday, Aug 28, 2005 at 20:10
The break was in front of No 1 piston so it wasn't due to stress by making the engine work hard, if it was the break would have been after No 1 etc.
If the belt was too tight the tensioner would have been very badly installed or siexed up. The belt is a finite length and cannot really be too tight. I reckon something else would have broken before the main crank.
Go back to the dealer and complain, the truck is
well out of warranty however the fail is such a rare one that you may have a win. I heard of one owner having a front diff replaced many K's after warranty as rover said it should not have happened and did the job free.
I reckon a second hand engine would be the go initially if you get no joy as there will be a few round the place. Probably far cheaper the a new crank and associated bits.
FollowupID:
381744
Reply By: 120scruiser - Sunday, Aug 28, 2005 at 20:07
Sunday, Aug 28, 2005 at 20:07
Sounds like the harmonic balancer has either been left loose or over tightened.
I know a rover dealer in
Sydney doubles the torque on the balancer to attempt to rectify the thing coming loose and wrecking the key way, balancer and crank.
Only assumptions though.
I have had a few rovers with knackered front key ways. It is a common problem not that that helps though.
We have trialled grinding 2mm off the harmonic balancer retaining bolt to stop it bottoming out in the crank and hence not tensioning up the balancer. Don't know if its worked yet as its too early to tell.
AnswerID:
127226
Follow Up By: pt109 - Sunday, Aug 28, 2005 at 21:48
Sunday, Aug 28, 2005 at 21:48
when we rang the mechanic he said it might only be the keyway on the harmonic balance as they have come across this problem before .Will get in touch with landrover on monday.
thanks heaps to everyone who has replied .dont think we will be going to the east in september as we had hoped.Maybe next year at least the motor should be in good condition by then the invoice paid and the disco back in our posession(just joking) thanks again.
FollowupID:
381758
Follow Up By: Disco200Tdi - Monday, Aug 29, 2005 at 10:03
Monday, Aug 29, 2005 at 10:03
I have had to repair the crank due to the crankshaft bolt not being done up tight enough after timing belt replacement.
If it was just a loud ticking noise my guess is keyway damage, timing gear and harmonic balancer. You may be able to replace the keys and use the correct loctite to fill
the gap in the keyway.
During installation use loctite between crank and the harmonic balancer and do the crank bolt up super tight whilst sopping engine turning with special tool. Recheck after a couple of weeks.
On my 200 Tdi I use a length on pipe on a 3/4" drive to get the leverage.
I think the rover specialist sholud foot the bill, otherwise you could be up for in excess of $1k.
Regards
John D
FollowupID:
381795
Reply By: pt109 - Monday, Aug 29, 2005 at 21:18
Monday, Aug 29, 2005 at 21:18
try3k
AnswerID:
127363
Follow Up By: Darryn - Tuesday, Aug 30, 2005 at 15:28
Tuesday, Aug 30, 2005 at 15:28
I know where there is a Range Rover 4 dr with a Chev V8 for 3k!!
FollowupID:
381949
Reply By: pt109 - Tuesday, Aug 30, 2005 at 19:49
Tuesday, Aug 30, 2005 at 19:49
sounds good .repairs have started. any ideas on what to do with old crankshalf(no violence please)thanks to all who replyed.3000 diveded by nine is ??? only joking thanks heaps catch you later.
AnswerID:
127512