Odd water and oil problem
 

Having a bit of trouble with the water and oil on the t5 (02 v70).
Its running and driving fine but twice now it has spat out the dipstick along with a spray of oil. On the other note I'm getting a water leak from I believe the pump as its dripping from behind the cambelt cover. I removed it today and had it running for a bit but there's no drip and I cant get it to drip or blow the dipstick. I'm thinking it is only doing it when its been on a run and boosting. This is my first turbo car so I dont know if there is something that could be causing back pressure in the oil and cooling system? Any help will be apreciated.

"spat out the dipstick along with a spray of oil." Possible PCV system failure do to blockage causing crankcase overpressure event. Another option, albeit a worse scenario, is a cracked engine block that is allowing pressure to build up inside the crankcase. Another indication of a cracked block is usually excess steam from the tailpipe.

Could this be causing the water leak as well? I think the water is coming from the weep hole in the water pump but it only happens after a good run. I'm wondering if anything could pressurize both systems causing the water to leak and the oil to be pressurizing. The header tank seems to be clean and the oil seems ok just these mad issues.

If you can verify the coolant is indeed leaking via the weep hole it is more likely that the water pump is failing. Any reputable mechanic should be able to pressurize the cooling system to locate the leak. If the water pump is bad and the camshaft belt is close to changing, it would be adventitious to replace it as well.

An easy way to check the PCV system is to squeeze the lines near the turbo and flame trap for indications of blockage. IIRC the PCV system maintenance interval is around 100,000 miles.

if you can see the weep hole(tell tale hole), maybe with a small mirror, you should be able to tell visually if it has been leaking. it will be wet, or, it will have some crusty staining around it either from rust in the water or dried up antifreeze if its leaking. the stain could be red/blue/greeny depending on the colour of your antifreeze. ive never seen a leaking water pump that hasnt stained the alloy housing- this might save you the cost of a pressure test if you can see the tell tale hole

I have taken off the cam belt cover and there are signs of crustyness below on the chassis rail so im going to take it for a run if im home early enough and then have a look when I park it up. the cambelt was changed 20k ago (not by me) but I just thought it was a bit odd to have two similar problems that occur at the same time. But I suppose I will be better off having both these problems than one big one. I already have one that I cant do myself in the clutch slipping.

Quick update found the water leak. it appears to be coming from behind the pulley so I think a new water pump is in order and check the oil breather. Not too bad news its better than a cracked block.