Hey All

[LyleD]

Hi, my name is Lyle and I discovered this forum as I have an 83 GMC that I have recently purchased and been working on. Currently, while replacing a fuel injector, I happened to look in the pipe that runs from the turbo to the intake and saw a small pool of oil. Now I am wondering if I need to rebuild the turbo!
This looks like a friendly and highly informational forum. I am looking forward to learning and participating/contributing here!

 

[ak diesel driver]

Nice looking truck. Snap a picture of your engine bay so we can see what turbo and CDR your using.

 

[LyleD]

Thanks! Here are those pics. I just found where it says its a GM5.

 

[jrsavoie]

Nice looking engine compartment

 

[SnowDrift]

Welcome.

Someone much more space under the hood with the older body style

 

[Will L.]

Welcome, Looks great.
Please fill out your signature line with the rig and details regarding it. This helps a lot in chasing problems over time.

We can’t see how you get rid of crankcase pressure. In a gasoline engine this would be the pcv valve & hose. Originally on the 6.2/6.5 this is done through the cdr and hose that would have fed back to the incoming air supply.

On a natural aspirated engine it would have been to the port you have plugged on the side of the intake manifold & fed from a can that looks like a tunafish can plugged into a valve cover.
On a 6.5 turbo the tuna can would look the same but feed to the intake hose that is between the air filter and the turbo.

 

[LyleD]

Welcome, Looks great.
Please fill out your signature line with the rig and details regarding it. This helps a lot in chasing problems over time.

We can’t see how you get rid of crankcase pressure. In a gasoline engine this would be the pcv valve & hose. Originally on the 6.2/6.5 this is done through the cdr and hose that would have fed back to the incoming air supply.

On a natural aspirated engine it would have been to the port you have plugged on the side of the intake manifold & fed from a can that looks like a tunafish can plugged into a valve cover.
On a 6.5 turbo the tuna can would look the same but feed to the intake hose that is between the air filter and the turbo.

Thanks for the insight and advice Will. I will get that done.

 

[ak diesel driver]

So you have a 6.2 style CDR system where it evacuates from the oil filler neck and then it looks to go to a catch can and then from there to the intake piping. Depending on the catch can (can't tell from the pictures) it may be doing little to no good or possibly even be full unless it's setup to drain back to the crankcase. Also the hose going to the intake piping should be closer to the turbo.