CDFP Question

[Polish_Eagle]

My CDFP isn't covered by your warranty since I'm not the original owner, but I have a question about disassembly. My pump is dirty on the inside and needs to be cleaned, but when I went to use an 18mm socket to remove the internals it didn't fit. So I was wondering if you could let me know the socket size needed to remove the internals.

I tried different metric sockets that I have, but I don't have a 20mm. From the looks of it, it appears to be a 20mm socket but I want to get confirmation before I order the socket (20mm isn't readily available).

[pwdunmore]

Originally Posted by Polish_Eagle My CDFP isn't covered by your warranty since I'm not the original owner, but I have a question about disassembly. My pump is dirty on the inside and needs to be cleaned, but when I went to use an 18mm socket to remove the internals it didn't fit. So I was wondering if you could let me know the socket size needed to remove the internals. I tried different metric sockets that I have, but I don't have a 20mm. From the looks of it, it appears to be a 20mm socket but I want to get confirmation before I order the socket (20mm isn't readily available).

How-to: Install your Autotech fuel pump internals

Says 18mm in that How to. Maybe your socket wasn't deep enough to clear the spring inside of it.

[Polish_Eagle]

Originally Posted by pwdunmore How-to: Install your Autotech fuel pump internals Says 18mm in that How to. Maybe your socket wasn't deep enough to clear the spring inside of it.

That's what I thought too after reading all the how to's, but 18mm doesn't work. I also went to the autoparts store and tried varying heights of 18mm and non worm. I then tried 13/16 by hand and it fits over but too loose for me to want to even try it. When I checked wrench sizing charts, the next step down is 20mm.

[5doorsoffury]

I believe cpe uses a larger nut in there pumps not 100 percent on that . The how to is for installing internals in a stock pump not a cpe pump. 20mm sounds right just get a deep socket that is 20mm all the way not one that reduced diameter to a stud size hole inside.

[pwdunmore]

5doors is prolly right because it's a CPe pump which I didn't notice in your signature, do you have any measuring calipers to get an exact size on the nut because that would conclude this mystery lol.

[Polish_Eagle]

Originally Posted by pwdunmore 5doors is prolly right because it's a CPe pump which I didn't notice in your signature, do you have any measuring calipers to get an exact size on the nut because that would conclude this mystery lol.

I had a caliper, but can't recall where it is. I was using it in school last semester for my engineering design class but don't know it's whereabouts.... Lol

[pwdunmore]

Originally Posted by Polish_Eagle I had a caliper, but can't recall where it is. I was using it in school last semester for my engineering design class but don't know it's whereabouts.... Lol

Sounds like something that happens to me all the time... lol.

I still can't find my work headset that I was using less than a month ago... and now I'm working on a computer and making calls so it would be perfect. Fuck murphy's law...

I don't think have a 20mm deep socket either otherwise I would just let you use it lol. I will check when I get home but as you said it's an odd size to get in a set. I know my normal set jumps from 19mm to 22mm but my other set might have it with any luck.

I'll let you know if I do.

[5doorsoffury]

Put 2 flat thooth pics on eather side of the nut and use a ruler to measure the nut diameter and convert to mm useing google. If u want to be anal u can subtract out the thickness of the thoothpics but u get the idea. Good luck dude.

[Polish_Eagle]

Originally Posted by 5doorsoffury Put 2 flat thooth pics on eather side of the nut and use a ruler to measure the nut diameter and convert to mm useing google. If u want to be anal u can subtract out the thickness of the thoothpics but u get the idea. Good luck dude.

Haha, love it. I'll see if CPE can confirm before I finish my classes today, if not I'll do that.

[Nitr0EngiE]

good luck getting that info readily from cpe

[mr.speedy3]

First time I ever did it, I forgot to compress the spring (by just pushing on it with whatever you're using, impact gun/ratchet). I thought the same thing: "The fuck? My 18mm deep well isn't deep enough?". It is a spring, and it does compress lol

Yes I admit to being a noob once upon a time.

[Polish_Eagle]

Originally Posted by Nitr0EngiE good luck getting that info readily from cpe

LMAO, oh I know. I was just hoping since they won't warranty my fuel pump with their "Lifetime Warranty", that they would at least help me out by saying the nut size.

[Polish_Eagle]

Love the support, you can always count on cpe.....

[Polish_Eagle]

Decided to just buy a new caliper today and measured the nut. The caliper said it's 19.8mm, which means I indeed need a 20mm socket.

Thought I'd post it here since cpe is the least bit helpful and other users could potentially benefit from this.