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ecm911's Avatar
 
Join Date: Oct 2001
Location: Downingtown, pa usa
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Stripped oil draion plug on tank ?

The oil drain plug on th oil tank will not torgue up. Does anyone know what size these are on a 1978 911SC?

Is there an oversized plug available? where?

Any suggestions are appericated.

TIA

Earl
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Old 03-25-2005, 08:41 AM
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I believe they're 22mm as delivered....

Wil

EDIT.... M22 x 1.5 ....
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Wil Ferch
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Last edited by Wil Ferch; 03-25-2005 at 10:59 AM..
Old 03-25-2005, 09:11 AM
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Thanks Wil

Any idea where to get an oversize one?

Thanks
Earl
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Old 03-25-2005, 11:21 AM
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I don't now how much "meat" is there for you to go larger....if you end up going larger...look (maybe) at one of the many industrial supply places loke Graingers, McMaster-Carr...or MSC. I believe they have their web sites posted here after a search...

Good luck...hope others can give you more positive answers...

Wil
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Old 03-25-2005, 11:46 AM
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if you have the short plug, find a long one and use the remaining threads farther up in the hole.
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Old 03-25-2005, 12:14 PM
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You could also consider a Fumoto valve so you don't have to worry about taking the plug in and out in the future.
http://www.fumotovalve.com/

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Old 03-25-2005, 12:20 PM
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Rick,
Thanks for posting that. The Fumoto valve should be OEM on these tanks.

MHO,
Sherwood
Old 03-25-2005, 01:08 PM
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if you got all day to watch the oil drain, they're ok. i just take them out like a drainplug.
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Old 03-25-2005, 01:21 PM
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I like the Fumoto valve....it offers other benefits like when ( if?) you overfill...you can take a "smidge" out without fuss and bother.

John Walker is right...the oil flow is reduced considerably...but then again, the "original" flow is HUGE through a 22 mm hole...as if we didn't know.

So being somewhat slower is ( for me) of little concern. However, if time=money ( like it may be for a certain Washington State shop owner)...I might be temped to say it's too slow too !!

Wil
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Old 03-25-2005, 02:21 PM
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"i just take them out like a drainplug."

Okay. A dual use device. A drain valve AND a drain plug. If it's frozen in the hole, open the valve. Good backup device.

Sherwood
Old 03-25-2005, 02:38 PM
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That Fumoto looks pretty cool. It also means you don't have to remember to get the crush washers . . .

Did you guys use 2? Or just on the main tank? And with or without the nipple extension?

TIA

Ian
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Old 03-25-2005, 02:58 PM
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I don't have one, but only put it on the main tank! The sump plate is much too low to have a valve attached to it, unless you care to leave your oil on the road!
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Old 03-25-2005, 03:05 PM
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It should fit on a Carrera. The engine drain is on the side & the engine has the middle ridge that would still be lower. But a very good point, Brian.

Ian
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Old 03-25-2005, 04:02 PM
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Fumotos work for 3.2's...I run two....one on the tank and one on the engine case. Correct, no fuss with new crush washers either.

The engine version is mounted horizontally out of harm's way on a 3.2.

Correct...for the sump-plate cars like 3.0's and such, it's protruding, low, vertical mounting on the engine is dangerously low. Engine size is 20mm, so watch out for sizes.

Wil
Old 03-25-2005, 04:56 PM
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I installed one on my tank about 8 years ago and its proven to be very reliable. It does slow down the oil flow but for me thats offset by how much easier it is to do an oil change.

As mentioned earlier, on a 3.0 you can't install one on the engine, too low but on the tank it seems to be out of harms way.

This is one of those low glamour, inexpensive upgrades that makes life with a 911 just a little better. I'd do it again.
Old 03-26-2005, 03:30 AM
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back to the original thread

Perhaps you could use helicoil to fix the threads.
Old 03-26-2005, 04:37 AM
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When my tank started leaking a few years back, I bought a refurbished replacement. The threads on the drain were stripped though. I 'liquid metalled' a Fumoto valve in place and haven't had any problems since.
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Old 03-26-2005, 05:07 AM
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Yes, Ruf, for a permanent repair, I would recommend using a Helicoil kit. They are easy to install. Just drill out with the bit specified in the kit, use the tap in the kit to cut the threads for the Helicoil, and use the tool provided to install the Helicoil insert. Make sure to flush the tank thru with some oil to remove the metal chips.
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Old 03-26-2005, 06:34 AM
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A note of caution about the Fumoto valve, at least in my stock, 2.7L, 1976 911S application. The valve's threaded portion was too long for my oil tank threaded hole. It bottomed out before the valve's sealing face contacted the mating face on the tank. After confirming with the supplier that I had the correct valve, I shortened the threaded portion by sawing off 1/4 inch (after thoroughly masking the valve interior).

Howard
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Old 03-26-2005, 07:03 AM
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Good stuff, but, with this Fumoto valve you have no more magnetic pick up of metal particles. I installed magnetic plugs in both tank and sump plate.
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Old 03-26-2005, 09:38 AM
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