EuroRod

I'm to going make a drain system for my ProCharger similar to the ones I've seen here on the forum, and I was wondering if anyone knew the thread size of the drain plug. That way I can fabricate the system, and install it at my next drain interval. Thanks.

saplumr

I used the Parker part #F50G-S (#5BOSS-1/4NPT). The thread size in the ATI head unit is 1/4" NPT but the fitting above has a straight (non tapered) male thread with o-ring on the head unit side and 1/4" NPT female on the outlet side.

Bruce

EuroRod

Sorry, Bruce. You lost me. I'm not sure what you're referring to with the "fitting above". Is this the fill port? The drain fitting on the bottom of my head unit seems to be larger than 1/4". The Parker piece.... it threads into the bottom of the head unit with an O-ring for a seal and the 1/4"NPT that then attaches a ball valve, or some type of on/off valve? Is this correct. Can I get this Parker piece at a plumbing supply? Thanks for your help.

saplumr

Sorry for the confusion. The "fiiting above" I referred to is the fitting I listed at top of my post. It is 1/4" and I did install a stainless 1/4" ball valve below the fitting that screws into the head unit. I turned the handle so I could access it by reaching between the head unit and engine block. The Parker part is available at a hydraulic shop.

EuroRod

Woo-hoo, thanks Bruce. I have a good hydralic shop close by that I've used before for some custom lines. I'll check them out tomorrow. Mucho thanko.

LS2BYU

Sorry, but I have visions of all kinds of people jamming the wrong fitting into their head units because of bad information, its tapped 1/2-20.

EuroRod

Made it to the hydralic shop today, and picked up the fitting(1/4"BOSS w/O-ring on one side, 1/4" NPT on the other) and the Parker ball valve. The valve is just like the one on the pic, complete with yellow lever.

Expensive little sucker !!!!

saplumr

Yeah, a little pricey but well worth it when it comes to the oil change. I put a plug fitting at the end of my braided hose to prevent the 'trickle down effect" after oil drainage. Make sure you securely tighten the fitting into the head unit.

Bruce

EuroRod

Yes, I'll plumb in a SS braided drain line with an AN fitting and cap. Don't want the residual oil in the line making things dirty. Think that's called the 'trickle-down effect"

LS2BYU

I'll assume you're lashing out because I corrected you in a public forum. Pipe thread is a tapered fit thread that seals from a wedging action on the threads. 1/2-20 is a straight thread that is sealed with a washer or o-ring which is exactly what you find on the drain plug we use at ProCharger. If you force a 1/4" pipe thread fitting into your ProCharger you will hose the 1/2-20 thread that is there.

C6dude

Ok guys,

You are both wrong...

The correct size is " 9/16-18 ORB ". (O Ring Boss).
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LS2BYU

Ha ha, no really it really is 1/2-20 and sealed with an o-ring. (otherwise known as -5)

This caped crusader is moving on, if people want to screw up their head units with the wrong fitting I guess that's their business. Maybe you can send SAPLUMR the bill...

LS2BYU

Self explanatory. Picture of 1/2-20 drainplug, the hole it fits into, a 1/2-20 thread chaser in the hole and a 9/16-18 chaser that doesn't fit.

saplumr

Here is my old drain plug screwed into a 1/4"npt cap. The second pic is plug after removal from cap. As you can see there is NO damage.

C6dude

LS2BYU

You are absolutely correct on the 1/2 -20

the reciept above was for the ones I sent back because they were incorrect.

I cannot find the correct reciept to take a pic of.

I have all my part#'s on a list needed to make my drain kit and

the correct part # is "6405-05-02"
and believe me they fit perfect and are 1/2 -20
sorry for my confusion..
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LS2BYU

Wow, that's a real shocker.

1/4" pipe is larger than the 1/2-20 drain plug so screwing it into a 1/4" pipe cap wouldn't cause damage.

The drain plug I pictured is out of a P1SC/D1SC the drain plug out of my F2 is the exact same part. 1/2-20 boys.

LS2BYU

No problem at all, you weren't rude about it. I just didn't want to see someone screw up their head unit.

BTW the "05" part of the part number is the thread size. -5.

C6dude

It will probably seal, but don't forget the Procharger is Aluminum so the damage would be to the head unit's threads not the steel adapter or valve. Since it sealed and you do not have to remove it any longer to change your oil ,you should be OK.

I have $134 in credit at this Hydraulic company because I guessed on the fittings twice.
LS2BYU is 100% correct on the 1/2-20
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The number has been on my scratch board for 2 months or so I would not forget it and order the wrong size again and it's still there.


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saplumr

First,(right or wrong) I must apologize for spouting off, it's just no like me. However..I did attempt to screw my plug into a 1/2-20 die and it clearly does not go in, nor does a 1/2-20 tap screw into a 1/4npt cap. So the question is if my plug perfectly screws into a cap why doesn't the 1/2-20 tap if it's "so much smaller"?

LS2BYU

Your apology is accepted.

The drain plugs screws into my 1/2-20 die perfectly.