runaway diesels - Page 7

klarzy · 16th December 2016, 19:21

Would blocking the exhaust create sufficient back pressure to stop it?

murphyv310 · 16th December 2016, 19:31

Quote:

Originally Posted by klarzy

Would blocking the exhaust create sufficient back pressure to stop it?

Probably the safest way to go so long has you don't pass out with the fumes and no doubt very high pressure in the exhaust.

TBH it's only a car, human life is more sacrosanct than being in the way of an impeding bang or an engine throwing its toys out of the pram.

spyder · 16th December 2016, 21:24

Quote:

Originally Posted by klarzy

Would blocking the exhaust create sufficient back pressure to stop it?

Yes, done it twice.

Not a Rover though.

oldster · 17th December 2016, 00:26

Can the Turbo Oil seal fail suddenly or is there a number of gradual fail with the usual signs of excessive exhaust smoke on revving, etc?

Sent from my AT10PE-A using Tapatalk

Pete · 21st December 2016, 20:59

Quote:

Originally Posted by Christopher Price

If we're bringing Gas Turbines into the conversation, here's one I wouldn't mind having a go on. https://en.wikipedia.org/wiki/MTT_Turbine_Superbike

Gas turbines are dreadful contraptions in domestic settings.

t5tart · 22nd December 2016, 01:42

so cut the intercooler hose shove your t shirt in there stick your foot over the exhaust and pray lol

I still think a powder fire extinguisher to clog the air filter was an awesome idea a quick blast from outside the car no opening the bonnet clog the filter...no air job done and no risk of a con rod to the face and no damage to the car apart from a new air filter and a good clean up

t5tart · 22nd December 2016, 01:44

I guess a co2 fire extingisher would work also

topman · 22nd December 2016, 06:42

Quote:

Originally Posted by Pete

Gas turbines are dreadful contraptions in domestic settings.

Absolutely, a trifle noisy in the kitchen.

TomRS · 22nd December 2016, 08:07

Really good reading... i used to warn folk buying older diesels about this phenonomon.

I actually remember talking to a guy at work who had a Navara, that was smoking blue.. he was asking what was wrong, we eventually worked it out after some discussion that it was more than likely the turbo, i remember telling him to replace the turbo asap and explained the whole runaway thing.

I then told him that if it was to happen you either try and stall the car or block the air intake.

Anyway next day he came into work a little later than usual, came over to me and patted me on the back saying thanks, i asked what had happened... turned out he'd started the car that morning to come to work and it had started to run away, since our conversation he said he remained calm, hopped out and blocked the air supply with a rag he'd placed in the glove box literally the night before (as a just in case) he said the revs dropped down to about 2000 and he then stalled in by dropping the clutch with the brake on in 5th.

I was literally amazed that it happened he said it it werent for the talk he wouldn't have known what to do and probably would have let the engine blow up.
Anyway... moving on to safety feature to prevent this, my old A4 has a very neat little contraption built into the inlet pipe.

Its literally a valve that works off a simple 12v on or off signal, basically a butterfly valve, when the ignition is turned off it closes the valve stopping air flow igntion on flap opens.
Basically to prevent a runaway situation, you'll find most VAG diesel engines have this device.

Mike Noc · 22nd December 2016, 08:57

The coaches I worked on back in the day had exhaust brakes, which shut off the exhaust and allowed more engine braking as a result - could be useful to stop a runaway.

They also had hydraulic retarders, so if driven properly, the brakes would last for ages.

16th December 2016, 19:21	#61
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	Would blocking the exhaust create sufficient back pressure to stop it? __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

22nd December 2016, 01:42	#66
t5tart Posted a thing or two MG ZT cdti Join Date: Jun 2010 Location: Northants / Bucks border Posts: 1,815 Thanks: 260 Thanked 204 Times in 182 Posts	so cut the intercooler hose shove your t shirt in there stick your foot over the exhaust and pray lol I still think a powder fire extinguisher to clog the air filter was an awesome idea a quick blast from outside the car no opening the bonnet clog the filter...no air job done and no risk of a con rod to the face and no damage to the car apart from a new air filter and a good clean up __________________ now with ZT Diesel power after killing the connie and the zt180 combusting see my scrapbook thread check your sunroof drains and plenum drains http://www.buddy-icons.info/img/smile/1609.gif members who do t4 diagnostics map

22nd December 2016, 01:44	#67
t5tart Posted a thing or two MG ZT cdti Join Date: Jun 2010 Location: Northants / Bucks border Posts: 1,815 Thanks: 260 Thanked 204 Times in 182 Posts	I guess a co2 fire extingisher would work also __________________ now with ZT Diesel power after killing the connie and the zt180 combusting see my scrapbook thread check your sunroof drains and plenum drains http://www.buddy-icons.info/img/smile/1609.gif members who do t4 diagnostics map

22nd December 2016, 08:07	#69
TomRS Posted a thing or two Mk1 ZT 190 - Mk2 ZS 180 - Mercedes E63 AMG S - Ford Ranger Hawk Join Date: Mar 2016 Location: Middlesbrough Posts: 1,456 Thanks: 123 Thanked 409 Times in 281 Posts	Really good reading... i used to warn folk buying older diesels about this phenonomon. I actually remember talking to a guy at work who had a Navara, that was smoking blue.. he was asking what was wrong, we eventually worked it out after some discussion that it was more than likely the turbo, i remember telling him to replace the turbo asap and explained the whole runaway thing. I then told him that if it was to happen you either try and stall the car or block the air intake. Anyway next day he came into work a little later than usual, came over to me and patted me on the back saying thanks, i asked what had happened... turned out he'd started the car that morning to come to work and it had started to run away, since our conversation he said he remained calm, hopped out and blocked the air supply with a rag he'd placed in the glove box literally the night before (as a just in case) he said the revs dropped down to about 2000 and he then stalled in by dropping the clutch with the brake on in 5th. I was literally amazed that it happened he said it it werent for the talk he wouldn't have known what to do and probably would have let the engine blow up. Anyway... moving on to safety feature to prevent this, my old A4 has a very neat little contraption built into the inlet pipe. Its literally a valve that works off a simple 12v on or off signal, basically a butterfly valve, when the ignition is turned off it closes the valve stopping air flow igntion on flap opens. Basically to prevent a runaway situation, you'll find most VAG diesel engines have this device. __________________ http://i66.tinypic.com/5cd6xj.jpg

17th December 2016, 00:26	#64
oldster Newbie Rover 75 Saloon Join Date: Apr 2014 Location: Gosport Posts: 21 Thanks: 3 Thanked 4 Times in 4 Posts	Can the Turbo Oil seal fail suddenly or is there a number of gradual fail with the usual signs of excessive exhaust smoke on revving, etc? Sent from my AT10PE-A using Tapatalk

22nd December 2016, 08:57	#70
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	The coaches I worked on back in the day had exhaust brakes, which shut off the exhaust and allowed more engine braking as a result - could be useful to stop a runaway. They also had hydraulic retarders, so if driven properly, the brakes would last for ages.