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Luckily my engine doesn't seem to have any of these symptoms. Would you suggest that I still do a leak down test?

Thank you for your reply. I really hope it is not an injector, but on the other hand it is way easier to replace than the head gasket. I am thinking about also doing a leak down test, the kit is available to buy for relatively low price.

Hello. Let me start by telling you when and how the problem occurred. Half a year ago, I changed the coolant for the first time on the Astra H 1.7 CDTI 81 kW turbodiesel. This engine has nowhere to vent the cooling system. On the advice of some mechanics, I left the coolant tank open when I...

Hello, I am back with some back news. The car started producing a strange noise, it can be heard like knocking, and vibrations occur every time when the engine is at 1800 RPM. The vibrations occur always, no matter what the load on the engine is, whether it is in neutral or in gear, the clutch...

That is exactly what I have also thought. I heard about how a diesel engine can get hydrolocked due to the overfueling, but the fact is, that a diesel engine controlls the power by the amount of fuel injected (at the right crank angle, of course). So the real problem, as it seems, would be...

First time working on a diesel, I really want to be sure I didn't mess something up ... Also I like to learn

Didn't know that, thank you for the answer. So does the fuel pressure have any influence on closing the injectors in common rail engines? Is there a way they could stay open due to the pressure too high.

I agree, because too much fuel injected a little before TDC, when the injection takes place, would only result in higher engine power (RPMs, since the engine was in neutral gear). It isn´t possible that the injector wouldn´t close due to the overpressurised fuel rail, right? One more...

Thank you a lot, I really appreciate your answers. I am the engine enthusiast myself, so I really always want the best for the engine, let it be a lawn mower, motorcycle or a car. I also like to do maintenance by my own. This time was my first time doing on a diesel engine, that's why I am...

I was thinking about that also. So the increased amount of injected fuel in common rail engine would only result in increased revolutions am I right? I was also thinking about smoke, but this engine is fitted with DPF filter.

No, I checked that also. So you are saying there isn't a slightest chance it got hydrolocked from overfuelling? Thanks!

But I have no idea why it started to happen now, because I really wasn't moving any hoses, pipes or whatsoever. It was really a straight forward 5 minute job. So you really don't think that a small hydraulic lock could occur and bent the connecting rod just a little bit (since it was only...

Sorry I meant a bent rod. It is interesting that the sound occurs randomly, but mostly under no engine load or only a little load. It sounds like someone would rotate a rope in the circle in the air. I am not a native english speaker so I really can't explain the sound any better. It occurs...

Now I am getting a strange sound, like a turbo whistle but it is not. Could it be a conrod bearing from a broken rod? Happens every now and then with no logical sequence.

Yes, it really did have a faulty suction control valve (SCV), which I have replaced later next week. But I was worried it could have stalled from hydraulic lock, since it came to a sudden stop after running at 1200 RPM and massive pressure in the fuel rail ...

So there is no chance it could have hydrolocked in this situation of overpressurised rail? It then shut itself off by closing the injectors, or? It idles fine now, because I replaced the suction control valve. Thank you for the answers!

Thank you. I just can't explain myself how it stalled all of a sudded at 1200 RPM?

If a turbo diesel runs rich it increases revs, because the power of a diesel engine is regulated by the amount of fuel injected.

So why did the engine come to a stall then all of a sudden? If I was the one that shut it off, I wouldn't worry about that now ...

Hello all, I am turning on you with one question, which I really cannot solve by myself. I hope there is someone who knows stuff about diesel engines and will be able to explain some things. So, I bought a used Opel Astra 1.7 CDTI, common rail turbodiesel engine with 110 hp. It is an Isuzu -...