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CDR valve replacement - bracket modification.

Chaski

Active member
684
55
28
Location
Burney/CA
Hello--sorry for the question, but, what exactly does the CDR valve do?
Thanks
Tom Lovinggood
It is kind of like a PCV (Positive Crankcase Ventilation) valve on a gasoline engine, just a way to manage engine blowby. They can fail to work as designed when they get full of crud.
Below is a pic of where it is on a CUCV.

IMG_4647.jpg
 

Chaski

Active member
684
55
28
Location
Burney/CA
.......good point, I purchased 3 .....
LOL. That should be a lifetime supply.

I had a perfectly good one on my pickup, but it looked like it came out of the engine room of the Titanic. In a used parts stash I got off craigslist there was a nice shiny one. Installed shiny one - filed the titanic one in the round can. Developed highway oil consumption as soon as I installed the shiny used one. That is when I bought a new one and slapped it on. Just drove 300 miles with no noticible oil loss so I'm calling it a win. That is what I get for trying to fix what isn't broken....
 

german m1008

Well-known member
Steel Soldiers Supporter
883
1,302
93
Location
Rhein-Main Area, Germany
LOL. That should be a lifetime supply.

I had a perfectly good one on my pickup, but it looked like it came out of the engine room of the Titanic. In a used parts stash I got off craigslist there was a nice shiny one. Installed shiny one - filed the titanic one in the round can. Developed highway oil consumption as soon as I installed the shiny used one. That is when I bought a new one and slapped it on. Just drove 300 miles with no noticible oil loss so I'm calling it a win. That is what I get for trying to fix what isn't broken....
......it is for a longer time.....LOL.
And maybe.......one day the one or another is in need.........
With a truck, 30 years +, that you drive daily it‘s better to have more maintainence parts in the barn than an oil, diesel and airfilter.
Many years ago I owned a 69 El Camino....... I learned, sometimes you have to purchase parts when they are available.......
 

Drock

New member
1,020
9
0
Location
Eatonton GA
......it is for a longer time.....LOL.
And maybe.......one day the one or another is in need.........
With a truck, 30 years +, that you drive daily it‘s better to have more maintainence parts in the barn than an oil, diesel and airfilter.
Many years ago I owned a 69 El Camino....... I learned, sometimes you have to purchase parts when they are available.......
My original one was looking pretty crusty so I bought 2 new ones. I just keep a clean one on the shelf, then swap it out as needed, cleaning the other out before putting it on the shelf so it can wait it's next turn. 2cents
 

Tinstar

Super Moderator
Super Moderator
Steel Soldiers Supporter
4,254
1,687
113
Location
Edmond, Oklahoma
I buy replacement parts, needed or not, weekly. For not only the M1008A1, but all my vehicles.
Starter, alternator, fuel pump, CDR valves, filters, etc and lots of smaller, yet equally important parts.
A sizable investment that has already been beneficial.

Drives my wife crazy until I walk into shop and already have part on shelf for her truck and car.
 

cucvmule

collector of stuff
1,129
552
113
Location
Crystal City Mo
Not only do you have the part on hand but saves you a trip into town, unless that is an excuse to escape the house.

Now if I could organize, or take more time to put boxes of nos parts in site instead of bigger boxes to go through. Now I try to mark, inventory box to minimize locate time.
Sometimes it is just quicker to go buy at parts store then spend time to locate unless I have some lead time before repair.

Simple stuff, feet of hose, different sizes, nuts, bolts, washers, grades, metals, on site save me a lot of time. Only time the wife see's that time saved is when it is on her Yukon, otherwise it is only extra money spent.

When the GM parts man says that their are only two, three left that can be found they are going to be in my order.
 
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