313 cdi nightmare, blown engine

[DaveAlpine]

Hello,

I am deep in despair. I have a yr 2000 313 cdi with 200,000m or so. About 6 months ago we discovered a VERY severe case of injector blow by. Approx 3 garages and £2000 later we thought it was fixed when suddenly the engine started making a loud whistling noise then stopped working.

We replaced the engine with a re-con unit. It was still whistling and burning lots of oil then the turbo expired. We replaced the turbo.

I finished the job this afternoon and started the engine. It was idling fine, warming up nicely for two minutes or so when I noticed a fair bit of smoke from the exhaust. There was a lot of oil through the induction system and intercooler presumably from the turbo failure and I assumed this residual oil was causing the smoke.

I increased the revs a little to say, 2000 to try and blow the oil through a bit and see if the smoke got any better when the engine suddenly revved out of control right up to say 4500 rpm or more (revving it's nuts off) without me being on the throttle at all. I turned the key off and removed it but the engine kept revving really hard and I was frantic trying to think how I could turn it off. Before I could do anything the engine stopped abruptly. This was because it had blown no. 2 injector a good three inches up out of the head, snapping the hold down bolt and spearing into the induction manifold........I did and still do feel sick. I think I'll be able to laugh about it in a few years time as it was very spectacular.

I don't know what to do and need to have a think but does anyone have a clue what would make the engine go crazy like that? I've never seen anything like it ever. And also surely it should be able to rev as hard as possible without blowing an injector out of the head?

[DBTRANSPORT]

sounds to me like your engine ran away on the oil in the intercooler and pipe work from when the turbo leaked its oil. The oil should have been cleaned out of the cooler and pipes before starting the engine. The engine will have over rev'ed as it was running on oil not diesel from the pump so max speed could not be controled by the pump/ecu. Id be supprised if its only damaged the injector and clamp as pistons and valves can collide under extreme high revs also con rods and bearings will have been under exteme strain!!!!

[v6power]

Yes I agree, we had a Vauxhall Vivaro where the chap had overfilled it with oil. The engine blew itself to bits by over revving whilst running on the oil. Very spectacular as you say!!

[steel-jaw-sasha]

def ran on the oil in the intake system, bit late now but should have flushed it all out b4 starting!, could you repair the injector clamp and try again? i have run the engine with the intake pipe removed from the manifold so it blows the oil over the engine, makes a mess but better than blowing it up. connect it back up and drive it, it will smoke for a few miles but then clear.