All Things Mk5 > Mk5 General Area
URGENT oil pressure stop engine
Pesky jones:
--- Quote from: r5gtt on March 02, 2016, 06:58:39 am ---
--- Quote from: Chris92 on March 01, 2016, 11:39:39 pm ---A few turns will do no damage at all and there will still be oil on all the important internals anyways, it's no different to turning it by hand than it is via starter motor. Only different is your not turning it over fast enough for it to start.
--- End quote ---
I agree :smiley:
--- Quote from: Peskyjones on March 01, 2016, 11:41:59 pm ---Erm yeah it used to sound diesely before and then even more when I was.coming off the track before the engine cut out, is that what you were referring to?
--- End quote ---
Not sounding good pesky, could you tell whether the noise was from top or bottom?. Was it a metallic noise more than deisely?.
I'm wondering is if your hpfp tappet has anything to do with this?.
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Top, I don't know if you've seen or heard this before, but our engines can have problems with stretched cam chains, tensioner, adjustor etc. Some people replaced (like dazza did). Mine started to show symptons (getting more rattly when warm) but it wasn't as bad as some of the other cars I had heard. However, after I pulled off the track - the rattle was much much louder then ususal.
So I personally think the cam chain may have slipped when I was pulling to a stop. However, thinking about it why would it have sounded so much more rattly as soon as I was pulling off the track after getting the message?http://wiki.ross-tech.com/wiki/index.php/16395/P0011/000017 This is the ross tech code - it shows possible causes could be mechanical timing chain/belt or the N205 adjustment valve.
Pesky jones:
Just spoke to dads mate on the phone, he asked me about the noise it was making before it cut out. He asked if it was a slow clunk or a tick tick tick tick - it was the latter. He then said about oil pump, and that it may be that if the pick up pipe was relatively clear.
I said I’d check the oil pump tonight before he comes round Saturday, is it possible for me to do so? He said check through the oil for bits of metal etc. Its in a bucket at the moment, whats the best way of doing this?! Magnets?
Also, on this post here about half way down someone says that a crank sensor/ wiring issue can cause the pressure light to come on and cause the engine to cut out?
http://www.golfgtiforum.co.uk/index.php?topic=251930.0
At the time I thought the oil pressure turn engine off message would be like the low petrol light, where it comes and goes intermittently (which the oil pressure message was doing to me!) could it just be a sensor??
Dan_FR:
Crank sensor is easily ruled out if the RPM needle moves when cranking, or you see an RPM signal through VCDS. It also wouldn't be accompanied by the rough sounding engine noises that would be caused by low oil pressure
As for checking the oil, magnet could work, or buy a cheap strainer/sieve and poor the oil through it - your looking for chunks/teeth from cogs etc. Oil pump failure looks likely given that your strainer was far from blocked. A full inspection will reveal all, how much you can inspect it without full removal I don't know as I've never removed one on a TFSI
Even if it is oil pump failure, the big question is whether the engine has survived. Used oil pumps are a few hundred quid, new ones as obscene money from VW
Pesky jones:
--- Quote from: Dan_FR on March 02, 2016, 01:51:38 pm ---Crank sensor is easily ruled out if the RPM needle moves when cranking, or you see an RPM signal through VCDS. It also wouldn't be accompanied by the rough sounding engine noises that would be caused by low oil pressure
As for checking the oil, magnet could work, or buy a cheap strainer/sieve and poor the oil through it - your looking for chunks/teeth from cogs etc. Oil pump failure looks likely given that your strainer was far from blocked. A full inspection will reveal all, how much you can inspect it without full removal I don't know as I've never removed one on a TFSI
Even if it is oil pump failure, the big question is whether the engine has survived. Used oil pumps are a few hundred quid, new ones as obscene money from VW
--- End quote ---
Thanks for clearing that up @Dan_FR , I will sieve it through. If there is no metal, chunks etc then I will proceed this weekend to refit sump, remove HPFP fuse (need to find out which one) and then turn the ignition as @doylebros has advised. What am I expecting at this point? The "oil pressure turn engine off" was intermittent so it might not even come up on the dash anyway for me to observe it turning off if you know what I mean? Do I just keep the cranking going for a little bit and then reinsert the HPFP fuse and try to start the engine? Can oil pressure be observed through VCDS without the engine running?
Dan_FR:
--- Quote from: Peskyjones on March 02, 2016, 02:03:34 pm ---Thanks for clearing that up @Dan_FR , I will sieve it through. If there is no metal, chunks etc then I will proceed this weekend to refit sump, remove HPFP fuse (need to find out which one) and then turn the ignition as @doylebros has advised. What am I expecting at this point? The "oil pressure turn engine off" was intermittent so it might not even come up on the dash anyway for me to observe it turning off if you know what I mean? Do I just keep the cranking going for a little bit and then reinsert the HPFP fuse and try to start the engine? Can oil pressure be observed through VCDS without the engine running?
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Checking the oil is not a guarantee that there is no damage to the oil pump, teeth could be stripped, cogs snapped/detached etc. It needs to be checked and the cause of your low oil pressure found before trying to start it again
If the car fails to start, you will get the oil pressure warning light, caused from continued low oil pressure without the engine running
Even if the oil light goes out, all that means is that the oil pressure is enough to turn the light out (which is a really low amount, switch is something like 0.8 or 1.1bar, not the 5bar plus that you will see when driving.)
Oil pressure cannot be measured on the Mk5 AFAIK, certainly can't on my Leon, but then it is a poor person cars and doesn't even have a washer fluid level sensor, or the oil level sensor etc.
Seriously do not just try and start it without determining the cause first
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