 | Home > Puma (Tdci) > Diesel Runaway Help please |
 
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77   
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 Click image to enlarge Click image to enlarge Hoping someone is able to help, when driving along the other day at around 60mph my defender decided to max out its rpm and produce a huge cloud of smoke, it continued to rev until i eventually managed to stall it, (im assuming this is diesel runaway). After leaving it to cool for around 30 mins or so it wouldnt start so i had to get towed home. it wont start now, it just clicks when i turn the key. I have checked all the fuses and all fine. I have tried to read any fault codes with my nanocom but there doesnt seem to be any. the air intake pipe has some oil in it, as does the intercooler pipe? the crankshaft pulley is turnable by hand with a spanner so hoping the engine isnt completely destroyed? Any suggestions or advice would be greatly appreciated. Click image to enlarge |
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20th May 2025 8:30pm |
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| revd Member Since: 20 Apr 2024 Location: England Posts: 249
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Not looking good
From a web search on Transit runaway; 'You must have a major turbo or internal engine fault if it just takes off like that. Late 00s 2.2s are pretty notorious for stuff like that. Pistons, injectors, oil pumps and other nasty stuff were fairly common to go wrong. If the runaway stopped on its own, it's because the oil it was running on probably ran out and since it needs something in there to lubricate, and if its burning through it its going to disappear and make everything seize, or the high rpm overpowered the cooling ability of the oil and it seized. Once it cools down, it sometimes loosens up for a bit and can start again, but chances are the insides are half dead already at this point, and eventually, the seizing will be permanent. At this point, you're probably staring down the barrel of needing a new engine and turbo at least. Once you get low oil problems, the turbo is usually the first victim on these. The turbo air pipe is fairly simple to remove to check that. If it's bogging with oil and the spindle is wobbly, that's a pretty strong suspect. The sump is pretty easy to take off too, you can probably check the rod bearings and oil pump chain there. If there's damage on the bottom end, odds are it's a lot worse in the stuff on top.' |
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20th May 2025 8:43pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5922 
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Your engine may have just runaway due to a failed turbo.
I would do some basic checks (as mentioned above, 2 revolutions), fluid levels etc. then have a go starting it with the air intake pipe off the inlet manifold and with a standby item to block the air intake to the engine asap should it be required. |
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20th May 2025 8:51pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3552  
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Check also the crank case ventilation. The first 2 pictures are the inlet to the turbo compressor. I would expect a failed turbo would throw more oil downstream of the compressor, ie high pressure turbo hoses, intercooler and manifold. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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20th May 2025 8:58pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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i checked the two main intercooler pipes, the one that goes to the inlet manifold had some oil in but not masses and the one that goes onto the turbo looked pretty dry?
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20th May 2025 9:08pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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I can rotate it 2 rotations by hand with a 15mm spanner on the lower pulley it takes quite a lot of force to do but still rotates? |
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20th May 2025 9:09pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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I will have a look at turbo condition at the weekend, is it straightforward to get to the impeller? |
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20th May 2025 9:11pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 2338
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I suspect it’s a faulty turbo actuator , or linkage to actuator sticking fully open when engine was running.
I think Blackwolf had something similar on his 2.4 a while back. Interesting you have no DTC’s. |
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20th May 2025 9:17pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5922
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Easy to get to the turbo impeller. Pull the hose off the side of turbo and you will see impeller. Give it a wiggle and spin. If you feel anything more than just a very slight movement and free spinning it’s toast.
Is it a high mileage engine? What is/was oil level like after the runaway? |
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20th May 2025 9:20pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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i will check that out to see, i am assuming if the engine is hydrolocked i wouldnt be able to turn the crankshaft with a spanner? i am just hoping that it isnt damaged as it hasnt long been in.
I bought the engine used so hard to know for sure but it was advertised with 70k miles i think from memory. its a 2.4, the oil level doesnt seem to have significanlty dropped too much, there is still a fair amount showing on the dipstick |
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20th May 2025 9:26pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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i am assuming if it was just the actuator it wouldnt be accompanied by the large quantities of smoke? I am not sure though? Yeah no DTCs, i have tried multiple readers |
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20th May 2025 9:30pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 2338
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With the turbo stuck fully open on a running engine all the fuel air mixture would be out, so smoke could well be emitted.
Worth checking the linkage is free, harder to check the actuator and I would have expected DTC’s if it was the actuator. |
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20th May 2025 9:37pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 77
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okay thank you, the actuator should be movable by hand i am assuming?
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20th May 2025 9:38pm |
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| hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2328  
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I had this happen in France. It was in injector. One of the injector solenoids had jammed open injecting masses of fuel into the engine.
That amount of oil in the intake pipework is not uncommon and is just downstream of the PCV return which suggests crankcase pressure. Test the resistance of each injector and see whether any one seems out compared with the others > 110 XS Double Cab |
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20th May 2025 9:43pm |
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