oil warning signal

[ger83]

hows it going all, i have an 04 a4 1.8t and couple of months ago got the oil pressure light on when the level was perfect so change oil and filter and ran an oil flush which worked fine until yesterday it came back on and seems to come only when im driving, anyone ever hear of this problem?

[hagis]

It could be a problem with sludge building up in the sump, a common problem with the 1.8 turbos. Have a search of the site, you'll find plenty of references to it.

[toff]

So, I presume if you've already used an oil flush treatment and you still have the problems, your choices are:

1. Run another flush. (I don't know how often can flush treatments be used, they are pretty harsh stuff).

2. Un-bolt the sump pan, get rid of all the sludge & re-attach sump pan (gasket / gasket sealant will be required). Sadly you will loose most of the oil you've just put in.

If the problem persists, you would repeat step 2, run some cheap oil (of the correct grade) in the car for a week, then take the sump pan off again for a final removal of sludge.

Al.

[fourringsrus]

hi,as above basically,but i would seek the opinion of an expert in reference to the flushing process,the reason being that a couple of years ago a turbo re-manufacturer told me that on no account should i use an engine oil system flush, because this would drag all the crap and sludge through the turbo charger and potentially do all kinds of damage to the charger unit itself.
this said many motorists worldwide seem to use these products without posting horror stories,but i thought i would mention what i was told
maybe some of you forum boys know better in relation to this chaps engine
good luck.

[Crasher]

Drop the sump now before the engine and turbo are destroyed.

[storm4444]

Hi all,

I had this problem on my Audi A4. After being fed alot of BS by my dealer I found out that this is a very common problem with the 1.8t's. Apparently this problem is due to a carbon build up in the oil which cloggs up the oil strainer in the sump, as well as the breather/oil lines on the rear of the engine. If you don't clear these blockages the top of the engine will be starved of oil and be damaged. Unfortunatly I didn't find this out until after and was left with a £3000 repair bill! Nice.

steve.

Just one more thing you really need to change the oil alot more frequently than audi recommend as there is only 3.5 litres in there, which means it's getting used alot more than the oil in something like a BMW Z3 which has around 6.5 litres.