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Spectacular death of an Engine
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Dunno, but several years ago the wife's brother headed up a team to test Aston Martin DB7 V12 engines to destruction, then find out why they failed and re-engineer them. His results ended up in the DB9, Vanquish and DBS. I'd like to see video of those engines letting go.....
Dave
1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.
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I don't know what caused that but something that maybe not everyone knows is that if a diesel engine is significantly overfilled with oil it can blow up spectactularly - I know, I've seen and heard one doing itOriginally posted by Gresley View PostWhat the hell caused that?!
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It can suck up the sump oil via the crankcase ventilation system and as the engine receives more 'fuel' (oil) it revs higher. As it revs higher it sucks up even more oil and revs even higher
Then, guess what ? It carries on revving higher and higher and higher until .................BANG


There's no ignition to turn off and there's little hope of deliberately stalling it, bearing in mind the copious torque that diesels tend to produce.
Cheers
Julian.
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Originally posted by Gresley View PostWhat the hell caused that?!
Over the years I've seen a few engines that have throw a Con Rod (known in the trade as a "Leg out of bed") I suspect that's what happened in the video and shattered the crank case. I also think they were testing it to destruction, the give away being the high revs they were running it at. Large diesel engines don't do high RPM very well as you just saw
Ian.Last edited by milothedog; 16 December 2013, 21:13.Wise men ignore the advice of fools, but fools ignore the advice of wise men sigpic
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In our procedures manual when I worked for London Transport there was a course of action to deal with it, put a large hammer through the sump (they were Ali) never see it done though, you would be a brave man to go near a 11 litre Gardener 6LXB running away. Good to watch from a distance though I would have thought.Originally posted by jleyton View PostI don't know what caused that but something that maybe not everyone knows is that if a diesel engine is significantly overfilled with oil it can blow up spectactularly - I know, I've seen and heard one doing it
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It can suck up the sump oil via the crankcase ventilation system and as the engine receives more 'fuel' (oil) it revs higher. As it revs higher it sucks up even more oil and revs even higher
Then, guess what ? It carries on revving higher and higher and higher until .................BANG


There's no ignition to turn off and there's little hope of deliberately stalling it, bearing in mind the copious torque that diesels tend to produce.
Cheers
Julian.
Ian.Wise men ignore the advice of fools, but fools ignore the advice of wise men sigpic
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Yeah, brave man indeed
The one I witnessed was actually the second such incident in the same workshops in less than a year so the guys knew what to do ..........Hide
I actually walked into the workshops as it was revving and wondered why everybody was crouching behind pillars and walls
- someone grabbed me and explained, just as it went Bang 
Cheers
Julian
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Originally posted by jleyton View PostYeah, brave man indeed
The one I witnessed was actually the second such incident in the same workshops in less than a year so the guys knew what to do ..........Hide
I actually walked into the workshops as it was revving and wondered why everybody was crouching behind pillars and walls
- someone grabbed me and explained, just as it went Bang 
Cheers
Julian
You also omitted to mention the amount of smoke it generates
Wise men ignore the advice of fools, but fools ignore the advice of wise men sigpic
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Like this!Originally posted by milothedog View PostYou also omitted to mention the amount of smoke it generates
ZF 4 spd box, Datsun shafts, SS exhaust, 38DGMS weber 158.9bhp, BMW MC Tomcat seatssigpic
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