(’09-’13) Cr diesel pump blows – subaru forester owners forum wd gaster x reader

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Greetings! I recently bought a 2009 forestel diesel and I am already losing faith in it. The car had its motor replaced by previous owner, so, when I bought it, after 2000km the car started shaking, engine wouldnt shut down and had to be stopped with gear in, then we found diesel in oil.

This could be a worry. Unless the injectors are leaking, one would think once the ignition is turned off the car would stop because the diesel injection stops. Now this would be true unless another source of fuel, ignition and air is found. Bear with me…

And diesel engines will run on oil- especially diesel contaminated oil. And this oil-fuel can find its way into the combustion cycle through either a mechanical failure (e.g. turbo bearing) or aspiration in the sump feeding back into the intake manifold e.g. through PCV. Diesel contaminated oil is likely to be especially good at these! Have a look on the Tube-of-You and search for "diesel runaway". It’s a particularly ugly death, a bit akin to you drinking your own blood because you’re starving as the engine consumes its own oil until it seizes and/or fragments. I haven’t heard of a forester case but I think you may need to look at your turbo anyway.

And diesel engines will run on oil- especially diesel contaminated oil. And this oil-fuel can find its way into the combustion cycle through either a mechanical failure (e.g. turbo bearing) or aspiration in the sump feeding back into the intake manifold e.g. through PCV. Diesel contaminated oil is likely to be especially good at these! Have a look on the Tube-of-You and search for "diesel runaway". It’s a particularly ugly death, a bit akin to you drinking your own blood because you’re starving as the engine consumes its own oil until it seizes and/or fragments. I haven’t heard of a forester case but I think you may need to look at your turbo anyway.

The most likely source of this not shutting down was your mentioned sump aspiration feed into intake-the engine was full of diesel-oil mix. Maybe I was lucky-engine would run at just some 3000rpm, not at max rpm like in youtube, but, as I was driving, I put it again into gear and stopped the car and the engine by using brakes. My repairman showed me later-the intercooler, the piping-everything was full of mix. The first time it happened when I was driving on the highway up the hill, so I felt a lack of power, I even put a lower gear because I thought "what the ** is going on here?" until I heard a rattle like it was out of timing (no wonder-the fuel-oil mix would start burning as soon as it was compressed while, before, being vapourized by the turbo or the airflow). The second time it was a calm run on level highway with autopilot on, I didnt notice any loss of power, so as soon as I heard the noise, I had an idea what that was, I tried to shut it down with key and as it wasnt possible (idea confirmed!), I again stopped with gear in. Repairman told me, that as it was the second time, the state of the camshaft bushings or bearings or whatever they are called in english now was at question, because they were unlubricated properly for some time. Thus now Im considering how to get rid of the car without it hitting my pocket too much-if I repair it, the third time the leak may take the engine with it and then the costs will include replacing a whole engine-no, thanks!

When the car was being repaired first time in my ownership, repairman had suspicions about either return piping leaking or the injectors. The injectors turned out to be not too good, but the real culprit was when the pump was tested in diesel pump repair shop-he said it was spraying like crazy between the case and the shaft. He suspected that the pump had been damaged while being reinstalled by the previous owners, but now it happened again with the pump being ok, so it could also be ECU like youre saying. The mysterious thing-why it starts leaking. It could be that too high pressure tears through, but there is a mechanical rail pressure relief valve, isnt it? Can the pressure overwhelm the valve too?

When the car was being repaired first time in my ownership, repairman had suspicions about either return piping leaking or the injectors. The injectors turned out to be not too good, but the real culprit was when the pump was tested in diesel pump repair shop-he said it was spraying like crazy between the case and the shaft. He suspected that the pump had been damaged while being reinstalled by the previous owners, but now it happened again with the pump being ok, so it could also be ECU like youre saying. The mysterious thing-why it starts leaking. It could be that too high pressure tears through, but there is a mechanical rail pressure relief valve, isnt it? Can the pressure overwhelm the valve too?

I’m not sure of the exact design of the Subaru pump. It may be the pump was not completely repaired, or not properly repaired, or still has an issue- the same or another one. Maybe parts have been changed or modified (e.g. the pressure relief valve). It could be the apparent leakage was actually a symptom, not the problem. If the pump is still the issue then it may need to be checked out again. I assume it’s similar to others such that generally the pressure is controlled by a Suction Control Valve but I guess there should be a mechanical pressure relief also.

As you have said, there’s a lot of causal suspicions but not many proofs (and in my case, many guesses and speculations). If the leakage is a symptom rather than the problem, it will recur until steps are taken to diagnose and fix the problem.