Exploding oil filter

Hi

Got my car serviced at a vw specialists, he tuned it back to factory settings, and carried out a service with parts I supplied sourced from vw heritage.

the car stood idle for a couple of days, once I started it the oil filter exploded on closer inspection the seal had gave way, the garage replaced it and again it happened, this time after I drove for an hour. Again same issue with seal!

Any ideas 

if its a good quality genuine or mann then id say you have too much oil pressure. get some gauges on it that'll soon see. you should have around 5bar cold and 0.4-1bar warm

Probably a blocked pressure relief valve (which is in the metal part the oil filter screws into).

Thanks guys!

Any suggestions how to get into the pressure relief valve and unblock it?

Also if pressure is too high, what caused this any ideas?

Pressure isn't too high, but what happens is during cold start/running, the oil pressure is much higher because the oil is cold. The pressure relief valve is fitted to control the upper limit on oil pressure. So its not like there's a fault in anything other than the pressure relief valve.

I'd have thought replacement is the best option. It might be possible to soak the old one in solvent or parts cleaner or something, but it might not (fully) work.

Thanks Paul.

Shoukd I try Vw heritage or Avs for the replacement part?

the pressure relief valve is part of the oil pump, so to fix it you can just change the oil pump assembly. i dont know if the valve can be removed to service it and even if you did if it would actually help?

the part the oil filter screws into has no valves in it except the early mk1 gti oil cooler one which has a thermostat in it to close of oil flow when its too cold

They are available GSf have them, but I need the part number as they have three different types for different oil pressures for my car

Thanks guys

Jon are u suggesting I just replace the whole oil pump assembly?

if the pressure is high yes, ideally get your oil pressure checked first before you spend more money. I'd have thought your garage have the tools for this if you dont. Get them to check at the filter housing rather than the side of the head if possible as the pressure readings will be higher here. In case you need to know the oil sensor tappings on the filter housing are m10x1

If pressure is high changing the oil filter housing wont help, unless its blocked internally of course.

edit: theres a nice post about it here with pics and an explanation of how it works:
http://www.clubgti.com/showthread.php?197527-4-cyl-big-block-oil-pumps-how-many-versions-FAQ-added-p2-Updated-p4/page3

looking at it if any crud got into the wrong place it could jam the piston and cause this, he managed to get it out for photos but I dont know if it can be reassembled properly once removed (is the end plate an interference fit, or does it need crimping or something?)

Hey guys

So I decided to replace my oil pump, simply because I don't fancy cleaning out the old one putting it all back together then the oil filter seal goes and I'm covered in the black stuff!!

Anyway removed the sump, and was wondering what gasket should I get for my sump cork or rubber?

either is fine, rubber is a replacement for cork but you need slightly longer bolts. a good quality cork gasket will be fine, make sure you ask for the more expensive one from gsf! we bought a cork rocker gasket from them and it was nowhere near far too big

I thought the sump gasket was made from gasket paper, thats what I fiited.
the rubber or cork gaskets are for the rocker cover????????

I've just been on GSF web site and they do rubber and cork sump gaskets……… I'll get my coat…….

im not sure myself now, i think i hjave seen paper versions before as well as cork? could be just what gsf sell, or maybe vw have deleted the cork ones for paper. or maybe the original ones were paper and now they're cork?