Runaway engine, Mk7 2.2 FWD

[Peregrine]

Oh yes, no doubt they know how to charge. However, I don't have the time or facilities to change the lump over myself, so I am pretty much stuck

[karl]

Oh yes, no doubt they know how to charge. However, I don't have the time or facilities to change the lump over myself, so I am pretty much stuck

if you were closer id do it for you,but you miles away

and for half the price of what they are charging the cheeky twats

[pwhooftman]

I'm curious: i'd reckon a runaway engine would ruin it's valvetrain or timing chain assembly or other auxilaries first, not the bottom end. Unless it's running away long enough to use up all oil, which doesn't seem logical if it only runs away for 3-4 seconds. Anyone care to explain how the bottom end gets f'd up?

[davyjcb]

The turbo like the big ends and mains run's on a film of oil,if the oil pressure was low all the white metal bearings suffer the same fate you can't see the damage the crank is suffering because the excess oil escapes back into the sump but when the turbo lets go the oil dumps into the induction /exhaust system which is very evident this could what happened a long slow decline

[knobby1]

I'm curious: i'd reckon a runaway engine would ruin it's valvetrain or timing chain assembly or other auxilaries first, not the bottom end. Unless it's running away long enough to use up all oil, which doesn't seem logical if it only runs away for 3-4 seconds. Anyone care to explain how the bottom end gets f'd up?

When the engine "runs away" on it's own oil....it will run flat out, there's no rev limiter like when you're driving it, the rods usually get kicked out the side of the block because they cant handle the extreme loads.. The engine doesn't usually run out of oil, it just runs flat knackers until something breaks....the weakest link is usually a rod or rod bearing....there's heluva lot of load and inertia happening in there.

Lord Knobrot

[davyjcb]

The local tec did an experiment on this(motor vehicle Studies) an ran an engine with a tin of ether,same effect as blown turbo but it had good oil pressure and survived the instructor explained that con rods are designed to take most of their load vertically with some sideway movement the engine was then drained to a couple of pints just above the suction tube level and repeated 15 seconds did the job it threw a leg out of bed . oil starvation ,heat an the big ends bound up on the journals con rods cant take torque loading I think it was an old nova engine cant remember it was petrol but result would be similar

[andz327]

I'm curious: i'd reckon a runaway engine would ruin it's valvetrain or timing chain assembly or other auxilaries first, not the bottom end. Unless it's running away long enough to use up all oil, which doesn't seem logical if it only runs away for 3-4 seconds. Anyone care to explain how the bottom end gets f'd up?

Had a mk 6 2.0 do it, replaced the turbo, but van wouldn't start, had thought the worst but it was the fuel pump that had fooked up, second hand on and it ran perfect, think it's a bit to do with luck and a big bit of how quickly you realise what the fooks going on and stall the fooker
There's plenty supply and fit engine shops doing it for aboot £1200-£2000
What exactly are they saying is wrong with bottom end?? Have you heard or seen it yourself, the maybe think an injector knock is a knackered engine (they may not do transits much)

[Peregrine]

I only have their word for it over the phone so far but I don't doubt their diagnosis. I'll be going to see for myself tomorrow and, in the meantime, I've found an outfit who will supply and fit a good recon engine for just under £2k. Perhaps all is not yet lost!