|
|
|
|
|
|
|
#1
04-21-2007, 08:07 PM
|
|||
|
|||
|
Run away Diesel
I have been around Diesel engines since 1959 and have never experienced a 'run-away.'
In fact I don't even know of anyone who has had a run away. I am just wondering if anyone in the forum has any first hand experience with a run away. What are the odd? I currently have two Diesels, a MB 240D and an Isuzu P'up (2.2l Diesel) and carry nothing to stop a run away. what should I carry with me to stop a run away? bob 1981 240D 
|
|
#2
04-21-2007, 08:28 PM
|
|||
|
|||
|
Search the forums and you will find some runaway stories, some with unpleasant endings. Something to stop the air entering the intake is good. A rag, a plastic bag, a board, a CO2 fire extinguisher.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
|
|
#3
04-21-2007, 10:03 PM
|
||||
|
||||
|
__________________
Jimmy L. '05 Acura TL 6MT  2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China"  Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
|
|
#4
04-21-2007, 10:48 PM
|
||||
|
||||
|
I remember Larry's story. That was back in the old days before my 83 gor ruined and I was on here daily. There is a lot of good info in that thread!
JMH
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)
|
|
#5
04-21-2007, 11:54 PM
|
||||
|
||||
|
I bought a NEW 1980 VW Dasher diesel wagon that had a 1.5ltr engine. At about 80,000 miles, It would start to run away with itself. It usually happened after pulling a long grade and on the back side, downhill, it would start. What would happen was very eery! I would be coasting down the hill in 4th and the engine would start to get VERY noisy-clattery and pick up speed and POWER. You would look in the rear view mirror and see a white smoke screen that ANY battle field commander would be proud of!! The only way I could get it to stop was to apply the brakes to slow it down. It would then stop HARD dieseling and run like nothing ever happened.
What caused the problem was that the 1.5 engine had a SMALL crankcase breather passage through the cylinder head to the valve cover. The blow-by would go through the passage at high speed and right into the intake air box via the valvecover. The engine was running on its own lubricant. Also when it "Hard dieseled" it would create even more blow-by thus fueling the engine even more. Turning off the key did NOTHING. If I had clutched it, the engine would have wound to destruction because it wasn't speed goverened by the inj pump. I fixed the problem by making an external crankcase vent by-pass. NEVER had that problem again. When I wore that engine out, I put a new 1.6 diesel and a 5 speed out of an AUDI 4000 diesel. Man What a car it was to drive then. I could get 44mpg. I drove that car 19 years..... With fuel prices, I wish I had it back!!!
__________________
My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.
|
|
#6
04-22-2007, 02:47 AM
|
||||
|
||||
|
Answer
Quote:
Run away diesel, why does it happen? Have a great day.
__________________
ASE Master Mechanic https://whunter.carrd.co/ Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 2003 Volvo V70 https://www.boldegoist.com/
|
|
#7
04-22-2007, 03:13 AM
|
||||
|
||||
|
where is a good place to pick up a co2 extinguisher?
|
|
#8
04-22-2007, 01:30 PM
|
||||
|
||||
|
Quote:
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
|
|
#9
04-22-2007, 06:19 AM
|
||||
|
||||
|
Mate of mine drove his Kia Sorento through a dyke, only the bow wave came back over the bonnet into the engine, complete with a bucketload of silt. He got it out, only to find the engine wouldn't stop. It eventually redlined after a few minutes, and died painfully.
I wasn't there so I couldn't show him how to stop it, but Kia gave him a new engine anyway FOC 
|
|
#10
04-22-2007, 01:34 PM
|
||||
|
||||
|
yeah you need 20lbs atleast.
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.
|
|
#11
04-22-2007, 03:12 PM
|
||||
|
||||
|
An idiling diesel near gas vapors such as propane or natural gas can also cause a runaway.
__________________
My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.
|
|
#12
04-22-2007, 05:22 PM
|
|||
|
|||
|
So, I'm a bit confused. Why not keep a good hose cutter handy, and cut the fuel supply line? If there were a lot of gas vapors around, yeah, I guess it might keep going. But it seems like you just take out the fuel and you have a dead engine.
__________________
1985 300D, 237k. 1994 F-350, 6.9 diesel, 5 spd manual, Banks Turbo. 261k. Sold: 1985 300CD- 267K
|
|
#13
04-22-2007, 07:42 PM
|
||||
|
||||
|
Quote:
From what I can tell you need a really horrendous oil leak/consumption problem to have a runaway.
__________________
------------------------------- '85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit) '82 300D, 'Tex', 228k body / 170k engine ... summer car '83 300TD Cali Wagon 210k, wife's car
|
|
#14
04-22-2007, 07:55 PM
|
|||
|
|||
|
The main cause of runaway is an external, uncontrolled fuel source. Another possibility is a failure in the injection pumps governor. Installing the shutoff actuator incorrectly can push the fuel rack and cause a runaway as well.
All three can be stopped by cutting off the engines oxygen supply. However, in a truly uncontrolled run-away, the safest option is to leave the area immediately to prevent bodily harm to yourself if it decides to throw parts. Chances are, by the time you get to the extinguisher, pull it's pin, get back to the engine, aim, and squeeze the trigger, the engine is way past the point of safe return. Go out (on a warm engine) floor the accelerator without a load on the engine and see how quickly is revvs to redline. Try it with even 1/2 throttle. That's how quickly it can loose control, especially with an IP malfunction or external fuel source where it's revv's are no longer limited. Cutting the fuel supply on the latter two problems can stop the engine, but the remaining fuel inside the pump, lines, filter and injectors is plenty to destroy an engine.
|
|
#15
04-23-2007, 11:45 PM
|
||||
|
||||
|
I experienced first hand a run away diesel many years ago in a 1989 Peugeot 504 diesel sedan where the injection pump main shaft seal leaked diesel fuel into the crankcase. I was driving to work one winter morning going about 30 MPH when the car suddenly accelerated on it's own (as I recall, it felt like full throttle). My heart was thumping. Shut the key off but it kept accelerating. I used the brake and left it in 2nd gear (manual), slowed down and was able to stall the engine. I didn't know WTF was going on at the time and found out later by talking to the dealer.
__________________
85 300D turbo pristine w 157k when purchased 167,870 July 2025 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
|
 |
| Bookmarks |
|
|
Hybrid Mode
