Dear reader,

My turbo is leaking coolant form the wastegate. Does there go coolant through the wastegate, should it only be air/gas mixture? Maybe a seal thats broken? Any ideas? easy fix? Get another wastegate?
turbo type: td04-13c

 

A wastegate uses air pressure (in that hose your are pointing to) from the output of the turbo to push a diaphram/rod/lever/that opens a valve in the exhaust side of the turbo to bypass some of the exhaust gasses and keep the boost in control (down). So there is only air in the hose you are pointing to. Directly below that is a cooling system hose that carries coolant to the turbo.
Oil goes in the top, drains out of the bottom into the oil pan, coolant flows through the two fittings on the sides of the turbo center section.

 

maybe there is a leak inside the turbo...

 

"maybe there is a leak inside the turbo"

Nope,

Are you sure that hose below it is not causing the leak (pin hole, spraying up - if you think coolant is on the wastegate) - those hoses are commonly replaced - oil soaks them, heat from the exhaust gets to them, and they break suddenly - makes for a nicely blown head gasket.

Do you have a pressure tester or you have just found coolant on the wastegate?

 

no, just found coolant on the wastegate hose. I checked the rubber coolant hose and moved it up the connection a bit and tightened it.
I got the wastegate off, found a rivet and a small hole.. are these normal to have on a waste gate? if i hold both the connection closed and the small hole, there is a vacuum maintained but if i only have the wastegate connection closed there is no vacuum because of the small hole thats open...
mmmm... turbo's.. i'm finding myself in an unknown area of knowledge.
Any ideas?
o/

 

Someone drilled 2 holes in that area of the wastegate actuator to increase boost. It would take more pressure to push the diaphragm taking longer to open the wastegate. The boost pressure probably was too high with two holes, so one was filled with a rivet. Very clever - I have used a t fitting on that hose with a pressure regulator on the end of the extra hose to raise boost pressure slightly, and make it easily adjustable. Usually something prevents engine damage with too much boost on those old cars - the 240 turbos had a pressure switch under the dash that cut the fuel pump off if the boost got too high.

 

interesting! mmm... garage tricks! So these holes are not a hazard to the engine?
I think i solved the leakage problem, indeed the connection of the rubber pipes with coolant were leaking. I tightened the clamps a bit more. Engine needs to cool down now to check if the metal coolant pipes are properly open, check it with blowing air through them. I think so.
I pulled the engine and changed most of all the seals and gaskets. LEarning a lot from this, first time i pulled an engine. I got the turbo off and put it back together on the engine when installed again. Then i found that the turbo was smoking so i took the turbo off again and did a renovation according to a swedish turbo renovation blog, bought a turbo renovation kit from china with new seals and bearings etc. fixed that.
So i think i got the problem solved now with tightening the clamps, re-positioned the pipe a little that it does not touch the turbo wastegate hose. Maybe buy a new one of those coolant hoses, a good investment, preventive change.
Thanks for all the help and tips! much appreciated! another well maintained Ovlov 945 keeps on rolling for the coming 10 years! Most kids here in Sweden race with them drive them until they break, its a bummer to see, so i am proud mine is still mostly original and well preserved.
o/

 

I would replace both of the oil cooler water hoses - they get fried from proximity to the exhaust manifold/oil drippings and explode when you least want them to, causing (usually) a blown head gasket.