Hi all, stupid simple question, but I’m going to pick up my new/old Daihatsu on Friday (SUPER excited, cannot wait) and have been told limited room in the car that’s giving me a ride - so I want to minimise tools taken. Can anyone tell me THE size or the most common SIZES of the drain plug head on these little 660cc 3 cylinder engines? I put a few sockets in there and a 3/8 power bar, but I’m concerned that the socket selection is wrong, and the less rattling around the better. If you own one and don’ t know, could you check and also comment on if it looks original or replaced? Cheers 
Otherwise I’m going carpark spotting with calipers, ha ha. Save me from myself! 
most common sizes in the cars are 10mm, 12mm, 14mm and 17mm, think the oil drain is 14mm
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Can anyone second that / verify that? eg if you have one, could you go and check? thanks in advance. <3
I stand with Dale. They are the most common sizes you will use.
Sure, but I’ve known that since I was a child - I don’t care about common on the entire car - I care about the sump plug and the sump plug only I’ve seen large-thread sump plugs with 14 and similar sump plugs with 25 - for similar threads the head size can vary massively. Some aren’t even normal hex. I’ve seen a lot of stuff and they also get replaced and helicoiled hence comment about “is it original” - guess I’m running out of time so will just take what I’ve got and make do. Amazing that no one knows their sump plug size - I can tell you most of mine off the top of my head
13mm on the spare EF EL here but no guarantee that yours will be the same.
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That’s weird! Not many 13s on JDM cars at all but I have a brand new koken 13 so I’ll throw that in too and just see what I can get away with This time tomorrow I’ll have my my teenage dream car (no, not the FD3S, the other one, ha ha).
Agree its a bit odd so I went and double checked, definitely 13mm.
Engine is out of a 1995 L500 so no guarantee the sump plug is original but it looks like its been there for a very long time.
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Been more than 50yrs since I was a teen, my dream car back then and still is is an E Type Jaguar 
Since prices of E Types are now between A$150-325k I don’t think I’ll be getting one in this lifetime, best I’ve managed was to work on a 1966 E Type Coupe recently, has a faulty aftermarket electronic distributor, when that’s sorted I will be having a test drive so I can keep dreaming 
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hi! my pan drain plug is a 14mm, which seems to fit the best. good luck and enjoy your new car!
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Bingo! mine was 14mm too, though damaged. You wouldn’t f***ing believe what came out with the used oil and flush fluid, though… garnet… NZ compliance process sand blasts the entire underside of a vehicle if ANY surface rust is seen - then repaints it badly in cheap product. There was and still is garnet dust in every crevice, between every seal and panel, under every carpet, in every nook/cranny of the engine etc. Horrendous. I don’t give the seals much of a chance. But now it has good Aussie Penrite 10 tenths 5w50 (2.0l) in it supplemented by 0.5l of 15w50 race 10 tenths and being a pretty gutless engine spent 300km today at full throttle and near full RPM - 100% needs a power upgrade Survived, though. Only a few issues, lost 2 bits from it that weren’t bolted on right and damaged one other bit through my own stupidity. I hope it’s common with other more common models, but if not, I’ll be on yahoo japan searching for a replacement. I want a front bumper from a related model and will have to get the two awol bits out of Japan too. Fingers crossed.