Oil consumption on 6.2 diesels?
 

I have only had two 6.2's and one (85 K30) I only drove a few times. When I had my 84 short bed the first time around it used quite a bit more oil than I would think it should use. It runs like a top but does smoke quite a bit. The smoke seems to go away more after it is good and warmed up but still uses oil. Exactly what should I expect of the 6.2's as far as oil consumption within a 3000 mile period?

Re: Oil consumption on 6.2 diesels?
 

I have three 6.2 & one 6.5 & none need much oil between changes, never more than one quart.
I don't drive the 6.2s much anymore but if yours is in good condition & the depression regulator is good it shouldn't use no whole lot of oil.

Re: Oil consumption on 6.2 diesels?
 

It runs very good in my opinion. I'm just not quite sure where to start with finding out my it uses so much oil.

Re: Oil consumption on 6.2 diesels?
 

Start by looking down into the intake & see if there is evidence of oil puddling. DRs don't last indefinitely.

Re: Oil consumption on 6.2 diesels?
 

You may be able to clean a sludged up CDR with Dawn and hot water.

Re: Oil consumption on 6.2 diesels?
 

I think I am going to try and clean it first. I went out to look at it and noticed the hose underneath it. It's in pretty rough shape and looks like someone has tried to repair it in the past. I am trying to find if this is available aftermarket or dealer now. I haven't had any luck so far today finding a picture of it or a part number to reference from. Here is the old hose that goes to the bottom side of the CDR.

Re: Oil consumption on 6.2 diesels?
 

You can use SAE J30R7 hose. Just need to get the correct diameter.

Check Rockauto. The CDR isn't available but the hoses might be.

Re: Oil consumption on 6.2 diesels?
 

I will probably have to end up fabbing something up if I can't find the OE part. I did come across the GM part number for the hose but it was discontinued years ago and no aftermarket available from what I see. I am also going to see if I can get the old CDR valve apart to clean it and if not I have found one that I can purchase. Hopefully either cleaning the old one or putting the new one will help with the oil consumption. Pic of the OE part.

Re: Oil consumption on 6.2 diesels?
 

If you know the part number you can check Vintage Parts. I found an air cleaner intake hose for my 83 C20 there. They cannot help you unless you have the part number. Prices are not cheap.

https://www.vpartsinc.com/