Thread: If I could swear on here.....

I have seen a toyota landcruiser do that twice,the first time was at a mine sight the drill operater topped up his motor with the oil gun we used for filling up the dump trucks with they pump a heap of oil in a short time,
his motor took off he could not get it into gear to stall the motor it died with a bang,the second time was outside a toyota dealership heaps of blue smoke and alot of revs you could not see the vehicle or building for the smoke was thick.

Ok for you guys with manuals.

How are we surposed to stall a Auto Td5.

That's just great for us Auto owners isn't it.

Originally Posted by ak

Ok for you guys with manuals.

How are we surposed to stall a Auto Td5.

That's just great for us Auto owners isn't it.

Personally I would leave it in gear, point it towards a cliff and jump out.

Runaway diesel engines have been a potential problem ever since they have been used in road vehicles. The usual cause historically was balancing the oil bath aircleaner on top of the engine with it running (for example while adjusting tappets), having it fall over and tip oil into the intake. The Landrover TD 2.5 (not seen here) is reputed to often develop so much piston ring blowby that the crankcase ventilation system can carry sufficient oil vapour or actual droplets into the engine intake to cause it to run away, and the same thing can happen with any other diesel engines that ventilate the sump into the intake (often helped if the oil fumes saturate and partly block the paper air cleaner giving vacuum in the intake - caused by poor design). Very rarely failed oil control rings can allow sufficient oil past the rings for the engine to run on, but even rarer is enough oil getting past the rings to run away - usually there is insufficient compression to start before this stage is reached.

But the problem remained very rare prior to the use of turbochargers. Virtually all turbochargers use engine oil supplied under pressure to lubricate and cool their bearings, and all it needs is worn bearings and a seal failure for this oil to be fed under pressure into the intake. As a result diesel engine runaway has become much more common in recent years, and is a risk with all turbodiesels, not just Landrovers. In fact, since the turbochargers are invariably made by a specialist supplier, the probability is almost independent of the car manufacturer, depending on the turbo manufacturer and maintenance.

Once it takes off, unless stalled or stopped by blocking the intake (DO NOT USE YOUR HAND OR ANY OTHER BODY PART) the engine will run at increasing speed till the valves bounce and will continue to do so until something breaks or the lubricating oil is all burnt - it will then stop either due to fuel exhaustion or bearing seizure. Unless stopped before overspeeding or lubrication failure, very extensive engine damage is very likely.

John

to kill an auto with a runaway this only works if you are really really quick on the shift and catch it before the engine gets a full head of steam up... And its as cruel as hell on the transmission. and everything else

stick it in 1, lock up the brakes and hold the engine at stall.
open up the bonnet and have someone rip the hose off the intercooler, or pull the air filter and stuff a floor mat in there to cover the hole.

if that doesnt slow it down enough to make the pre ignition knock stall it out let the vehicle jump forwards and the TC locks up then slam it into reverse and if the transmission is good enough it will reverse up on the engine and try to turn the engine backwards... it will usually kill the TC doing so so that last one is your call, engine or tc, Id do it just to justify putting a manual in

Just got off the phone.

Turns out it was not burning oil, turbo is ok, engine is ok, the sump had about 3L of diesel in it!

Injector seals are being replaced otherwise there is no indication of anything wrong.

BIG THUMBS UP to Kev at Rovertech who despite being flat out has been working hard to try and find the problem.

Originally Posted by Frenchie

Just got off the phone.

Turns out it was not burning oil, turbo is ok, engine is ok, the sump had about 3L of diesel in it!

Injector seals are being replaced otherwise there is no indication of anything wrong.

BIG THUMBS UP to Kev at Rovertech who despite being flat out has been working hard to try and find the problem.

If it was dumping that much diesel there must have been a major problem??? If it was being dumped into the combustion chamber then there is a chance some heat damage to a piston has occurred, or scuffing of the bores.

As for the turbo question I have heard that there have quite a few fail in Canberra.