So, I purchased a turbo from said vehicle for $80. Not bad, I'd say, has a built in wastegate. However, as I got to looking at it, it kinda got confusing.

It's got several vacuum lines, and also some other doohickey above the wastegate spring. What is that thing? Also, it has about 4 oil lines, and I'm not sure which are feed and which are return.

Any help, or any direction to manuals that talk about this turbo would be greatly appreciated. I searched for a few hours on google, but couldn't find anything to help.

The mystery doohickey is front and center in this pic, the wastegate spring below it.

 

As for the oil lines... I would say 2 are oil lines, and two are coolant lines.
Some turbos use coolant as well s oil. Not all turbos only use a feed and drain oil line.

Use the number on the turbo (model number) and google it....you should find all kinds of info.
If not, I'm sure someone will correct me, or give you better info on it.

 

yes volvo uses coolant and oil to cool it.. i was looking at one also. decided not to do it.. i was looking for about 5-6 psi and its not worth the hassle to do.. but if you do post some pics up of the build

 

Sorry I am late to this thread. The 'doohickey' pictured is a CBV (Compressor Bypass Valve). When the manifold is under vacuum, the vacuum is applied here and the valve opens allowing the compressed air to leak back into the input of the turbo. This prevents the turbo from stalling. On the Volvo, and others, the air is metered before the turbo, so in order to keep the mixture right, once the air has been metered, it stays within the system.

If the air is metered after the turbo, then the common practice is to vent the compressed air to atmosphere, giving the cool popping sound .

Hope this helps

 

Also, if you have any questions about the turbo, I can probably answer most of them.