Drain Plug - Hyundai Forums : Hyundai Forum
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post #1 of 21 (permalink) Old 05-10-2018, 05:15 AM Thread Starter
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Are the tranny and oil pan used the same thread size, the 14mm-1.5 if so the tranny plug does it really have to be the big 24mm head bolt size or can I've used the same thread but have the head bolt smaller. Thks

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post #2 of 21 (permalink) Old 05-10-2018, 08:11 AM
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FWIW you can get new trans drain plugs from KIA for around $4 and they are magnetic. For some reason Hyundai does not show a drain plug for my Accent or the Gen Coupe but the KIA one fits both.

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post #3 of 21 (permalink) Old 05-10-2018, 09:14 AM
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Does Kia have a mag drain plug for engine oil...I don't have faith in the after-market crap out there! Thnx!

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post #4 of 21 (permalink) Old 05-10-2018, 10:27 AM
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I've been using the Mishimoto plug for over a year now and it works great.

https://www.importimageracing.com/pr...ed-3-2007-2013

Though it is a 24mm head and is made out of billet aluminum so you have to be careful not to over tighten it.

The first oil change I did I pulled very little metal shavings off the plug, it's been clean the last 3 or 4 oil changes since.

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post #5 of 21 (permalink) Old 05-11-2018, 10:14 AM
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m14 for the oil pan and m18 for the automatic transmission drain... I believe both were 1.5 pitch.

Aluminum drainplugs could strip after multiple usages, like the oil drain plug. I do NOT recommend aluminum drainplugs. I've seen plenty stripped Mishimoto, Greddy, and fancy anodized aluminum krap plugs. A quality calibrated torque wrench should be used and plug threads inspected at each removal.

GoldPlug, Powerslutracing, Dorman/Needa, and DimplePlug have excellent magnetic drainplugs, which are higher quality than the OE Hyundai/Kia plugs.

18mm or m18 - 1.5 transmission/differential drainplug is same size as what some Toyotas and Hondas use in some of their gearboxes. Magnetic drainplugs are available in various head bolt sizes. Toyota uses the same 24mm socket size and also 10mm Allen wrench size. Honda, my preferred plug, uses a 3/8 square(ratchet with no socket needed). And, DimplePlug/GoldPlug have a smaller sized head available if you don't want that pathetic OE transmission 24mm easy to strip barely thick enough transmission drain plug.

https://www.hyundaipartsdeal.com/gen...95b-27121.html
https://www.hyundaipartsdeal.com/gen...324-23000.html

Even the local autoparts stores sell magnetic dorman/needa/oiltite 14mm oil drain plugs and the transmission/gearbox m18, if Goldplug/Dimpleplug is not in your budget.

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post #6 of 21 (permalink) Old 05-11-2018, 10:57 AM
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The big problem with the OE drain plugs for the trans is the head is not 24mm. A 15/16" socket fits perfect but the 24mm is too big and will mess up the thin head on the plug if you are not careful.

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post #7 of 21 (permalink) Old 05-12-2018, 04:49 AM Thread Starter
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They reason I ask was since I've add the EZ oil drain with the L adapter and was going to do one for my tranny, but using a straight adapter. Just like these photos. I'm doing this route is because as you can see in the photo it's much easier and it won't give you the oil spelled. I'm asking because I need to know the thread for the tranny so I can get one with the straight. Since our sonata has the under belly protection or under belly skip plate, this will not be in No Danger
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post #8 of 21 (permalink) Old 05-12-2018, 07:39 AM
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The thread pitch on the 24mm hex head plug is a 18mm x 1.50.

Same as an O2 sensor FWIW.... Just had to buy a thread tap for one.

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post #9 of 21 (permalink) Old 05-15-2018, 02:42 AM Thread Starter
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Quote:
Originally Posted by Red Raspberry View Post
The thread pitch on the 24mm hex head plug is a 18mm x 1.50.

Same as an O2 sensor FWIW.... Just had to buy a thread tap for one.
Thnks bud your the best.👍👍👍
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post #10 of 21 (permalink) Old 04-09-2019, 09:43 AM
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I have a rant over...

...Hyundai using 16mm for the drain plug! I have 3 metric sets, none of which contain a 16! The best sub I found was a 6-point 11/16 socket from an old Husky set.

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