Reply With Quotesame as any other engine.
fatigue failure of the rod, loosing the bearing cap, little end failure, bearing siezurepiston failure, cylinder failure (usually thats a linerfailure), crank failure....
Master
Hey folks,
What causes a 300TDi to throw a conrod through the side of the block?
Normal engine running temps. Well maintained. New bearings a few years ago. Normal oil pressure. On a reasonably flat road - loud bang noise, shuddering, three or four inch hole out the lower left side of the block spraying out oil.
I haven't taken out the engine and disassembled yet.
Is the only causes a bearing or bolt letting go and the conrod banging around by itself? Oil pressure prior was exactly the same as it has been for years. I have multiple oil pressure gauges (including low pressure alarm) and cylinder head temp gauges etc that has become habit to look at every day. No weird noises or anything peculiar prior.
Thanks for any thoughts!
RoverLord
same as any other engine.
fatigue failure of the rod, loosing the bearing cap, little end failure, bearing siezurepiston failure, cylinder failure (usually thats a linerfailure), crank failure....
Dave
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Sounds like a big end, bearing bolt or cap failure, unless the rod broke.
If you don't like trucks, stop buying stuff.
Wizard
typical contributors.
Big end, little end, piston siezure, spun bearing.
Rarely do rod bolts fail unless they were incorrectly assembled - overtorque is an issue with those who manually click thinking they have a better feel than a torque wrench with angle gauge.
but you're probably looking at an overheat situation - localised - probably the big end bearing on the rod decided it was going to take a holiday in the sump.
Anything else broken? top end bits?
Roads?.. Where we're going, we don't need roads...
MY92 RRC 3.9 Ardennes Green
MY93 RRC LSE 300tdi/R380/LT230 British Racing Green
MY99 D2 V8 Kinversand
LordRover
Subscriber300 TDis are generally robust engines. The suddenness of the failure, along with the normal oil pressures, suggests that Dave has it, a fatigue failure, possibly of a cap bolt. Mercguy suggest overtorque, which is poss. Trouble is, that huge rotating sledgehammer aka the crankshaft will likely have destroyed the evidence if there were any revs involved. The forces involved are immense.
JayTee
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2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
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