tore down my cp3
#1
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tore down my cp3
Pulled my pump off my truck and tore it down but still could not pinpoint the exact place of the leak,there are six o-rings around the passages,one o-ring that seals around the inside of the pump,one on the outside lip of the pump that just keeps dirt out,and a shaft seal that could leak allowing fuel to come out the weep hole,none of the o-rings or seals had any signs of wear,so i'm wondering if it might have something to do with the winter blend fuel doing funky things to the o-rings or seals and that is why these leaks become so common when the weather gets cold.photos in my gallery
#3
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Interesting. From the reading here and on the TDR it appears that the leaks appear during the winter months and mainly up north. Wonder if adding a little ND30w or TCW-3 to the fuel would help?
MikeyB
MikeyB
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A friend of mine runs a bearing and seal store,so I'm gonna see if he can get me the o-rings and seals tommorow,the r&r of the pump is pretty easy,I did a step by step and posted it on the cumminsforum.there is no keyway or timing to worry about,the rebuild is very easy its just a matter of getting the parts.
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rich2500,
I read your post over there, good evalaution of what maybe going on with the CP3. I like the fact that you broke it down with pictures also for those of us who just learned what a CP3 is. I'll have to set up an appointment at my dealer to have it looked at. Until then, I will be holding off installing the tank vent mod. I dont need them saying " your unauthorized modification to the fuel tank caused the CP3 failure"
I read your post over there, good evalaution of what maybe going on with the CP3. I like the fact that you broke it down with pictures also for those of us who just learned what a CP3 is. I'll have to set up an appointment at my dealer to have it looked at. Until then, I will be holding off installing the tank vent mod. I dont need them saying " your unauthorized modification to the fuel tank caused the CP3 failure"
#6
I travel from Florida to the cold winter wasteland near the border. My truck has a diesel smell (no big leak but gotta be leaking somewhere) in the cold but not when I am in Florida. I also get much better fuel economy in Florida. So the winter blend fuel idea might have something to do with it.
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I'm not a mechanic, nor do I know anything about the CP3's but, could the severe cold be causing metal parts to contract just enough to cause a bit of a leak?
Joe F.(Buffalo)
Joe F.(Buffalo)
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