Oil pressure with no clear fault

I still think it is the oil pump, becoming a common failure on this engine. Now you have the engine rebuilt probably better to get the pump replaced if it is at fault, your other option is to trade it in and hope they don't notice before the deal is done.
 
shifty_uk said:
When driving.


Its just happened again. Currently sat on the hard shoulder until the damn engine cools down. Whenever the engine hit 90 degrees boom, oil pressure warning.
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You need to stop driving the car, get it towed home/to a garage. The temperature is likely shooting up due to the oil pressure dropping resulting in more friction and heat.
 
Its home now, im absolutely not driving it again. So, next stop, replace the pump you reckon?

Oh and temperature only rises when the car is stationary. It just so happened i was sat in traffic for a while before entering the motorway slip road, which is where it came in.
 
shifty_uk said:
Its home now, im absolutely not driving it again. So, next stop, replace the pump you reckon?

Oh and temperature only rises when the car is stationary. It just so happened i was sat in traffic for a while before entering the motorway slip road, which is where it came in.
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Yes, I would get the oil pumped checked you need to find out what is causing the oil pressure to drop before doing anything else. Replacing the pump is not cheap as the parts are around £600-700 so I would want to be 100% certain this is the fault before getting it replaced.
 
I'd say change the pump, yes - but I've never had to deal with an issue like this myself.
I'm just over-cautious as it's obviously such a critical component, and appears to be struggling.

As mentioned, hot oil is much thinner. The creeping up to 90 in traffic is normal, as when moving you have air flowing over the radiator so with a broken 'stat you're going to get over-cooling. When sat still there's no additional cooling, so the whole system will reach normal temp. Of course you probably know this already :)

Just my 2p.
 
I'm beginning to think this is more an electrical gremlin than an actual oil pressure issue myself. If the oil pressure when hot was that crap that it caused the light to come on whilst driving, I'm sure it would be on at idle, whether hot or cold.
Cheapest solution in my eyes would be to confirm this by fitting an oil pressure gauge in place of the oil pressure sensor. Simple gauge kit from halfords I would expect the easiest.

Temporary fit with wires coming out the bonnet and in through the door if you don't want to grovel for holes in the bulkhead. Wire it into the ciggy lighter.
 
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The thing that gets me is that if the engine place thought a new pump was in order, they would've said and went down that route as they knew about the initial pressure problems and I quote 'Investigated the problems, carried out troubleshooting & diagnostics, removed engine guards, drained oil, removed sump, cleaned oil pickup pipe, checked mains & big end bearings, all okay, rebuild bottom end" - I'm phoning them tomorrow regardless.

I'll get a gauge on it too. Cheers guys.
 
Death wish said:
Have a look at the balance shaft mate.
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That's quite a good call although the balance shaft is a diesel problem, I haven't seen any petrols with this problem but it could be possible that the petrol models have a similar oil pump. I take it you have had the oil pickup in the sump checked too as they have a habit of blocking. With the diesels there was a revised balance shaft designed which has better engineering tolerances so that it doesn't work loose.

And I noticed. Above you said you had the camshaft replaced due to damage to it, did they check the high pressure fuel pump cam followed as these wear out and damage the camshaft and the last thing you want would be for a worn out follower to damage your new camshaft. It's a very easy thing to check.
 
wildman_33 said:
That's quite a good call although the balance shaft is a diesel problem, I haven't seen any petrols with this problem but it could be possible that the petrol models have a similar oil pump. I take it you have had the oil pickup in the sump checked too as they have a habit of blocking. With the diesels there was a revised balance shaft designed which has better engineering tolerances so that it doesn't work loose.

And I noticed. Above you said you had the camshaft replaced due to damage to it, did they check the high pressure fuel pump cam followed as these wear out and damage the camshaft and the last thing you want would be for a worn out follower to damage your new camshaft. It's a very easy thing to check.
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It does occur on the 2.0 petrol tfsi too, I know because its happened to me lol. The sprocket on the balance shaft was what failed.
 
Death wish said:
It does occur on the 2.0 petrol tfsi too, I know because its happened to me lol. The sprocket on the balance shaft was what failed.
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Ohh that's interesting to know as I've been looking at the 2.0t but have been put off a bit by some of the issues. Do you know if it's the chain driven pump or the one with a geared drive as on the diesels there were two and the chain driven one (on earlier cars) was particularly bad
 
Death wish said:
I believe so mate. Is going cost me nearly 3k get my engine fixed because it damaged the top end of the engine when it lost oil pressure :(
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A balance shaft doesn't always mean having to replace the whole pump in a lot of cases the balance shaft can simply be replaced. There's a lot of info about it on the audi-sport forum
 
Engine was checked and taken apart under warranty.

It's now getting new bearings and a new oil pump :(

Thing is costing me a fortune - it'll be worthless without though.
 
If you don't mind me asking, how much is this costing and what garage is doing the work ? (I live locally to you in Livingston)

My MK5 Golf GTI is quickly approaching 100k , after seeing this thread again I dropped the sump a couple of weeks ago to check the oil pick up luckily all clear, hopefully helped due to me changing the oil every 6.5k since it was new as a lot of long life serviced cars are getting the pick up clogged up.

I won't be surprised if my oil pump needs replaced, my plan is to swap in a new engine in probably an ED30/S3 K04 equipped engine to make it worth while but curious what the going rate is now for the oil pump, local VW dealer advised around 1k for the parts inc VAT and £200-300 fitting.
 
Dangerous Dave said:
If you don't mind me asking, how much is this costing and what garage is doing the work ? (I live locally to you in Livingston)

My MK5 Golf GTI is quickly approaching 100k , after seeing this thread again I dropped the sump a couple of weeks ago to check the oil pick up luckily all clear, hopefully helped due to me changing the oil every 6.5k since it was new as a lot of long life serviced cars are getting the pick up clogged up.

I won't be surprised if my oil pump needs replaced, my plan is to swap in a new engine in probably an ED30/S3 K04 equipped engine to make it worth while but curious what the going rate is now for the oil pump, local VW dealer advised around 1k for the parts inc VAT and £200-300 fitting.
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My mk4 Golf 1.8t has 210k miles now, it had 10k service intervals when new and that dropped down to about 6k-8k since about 110k miles

Ive had the sump off mine and there wasnt a single spec in there. With normal intervals you dont get coke problems with these engines
 
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