84 GL1200 oil drain plug


Information and questions on GL1200 Goldwings (1984-1987)
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zamboni920
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84 GL1200 oil drain plug

Postby zamboni920 » Sun Feb 19, 2012 5:24 pm



Am I just stupid......
I made an attempt to change my oil today. Got a 5 quart bottle of oil, an K&N oil filter with o-rings and some tools. With bike on centerstand, I let it idle for about 20 minutes with an occasional rev to 2000, just to move the oil around well. I found the oil drain plug on rear of engine, located just aft of dipstick. Or, at least I thought that was it. It is a fairly flat, reversed(sunk-in) allen plug. I had first read the Clymer manual, the Owners manual, and all info I could find online.....including on this forum. Owners manual shows a standard hexhead plug, but no reference to where it is. Clymers manual shows a regular hexhead plug, but yet again, no real reference to where it is....although the picture was better, but I found no plug in that location. A picture on this forum, regarding GL1100, shows the plug beeing replaced with an aftermarket dipstick, wich also serves as drain.
So....now I am thinking I removed the wrong plug !? Oil did come out, but not more than maybe 1/2 quart. I still thought I was on track, and just had lost a lot of oil. (I guess this is where stupid comes in). I refilled less than 3 quarts, and upon checking dipstick, oil poured out.
Now I am back to square one....still needing an oilchange....but am at a loss. Anyone please take a picture of the general location, with an arrow pointing to the exact location. There are too many explanations and directions, all a little bit different.....makes it confusing. Most directions points to somewhere in vicinity of the dipstick on the 1200. Help please!?



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WingAdmin
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Re: 84 GL1200 oil drain plug

Postby WingAdmin » Sun Feb 19, 2012 6:36 pm

I don't know what you unscrewed, but it's definitely not the oil drain plug. The fact that when you removed the dipstick oil poured out now means you have far too much oil in the crankcase - DO NOT start the engine like this! You can do serious damage.

The drain plug is located on the BACK of the engine block, very near the bottom, on the right side of the motorcycle:

GL1200 Oil Drain Plug
GL1200 Oil Drain Plug


You will need to get underneath the motorcycle (while it's on the CENTER stand), and look up at the back of the engine. It's easier if you look up from the left side of the bike, just in front of the rear wheel. You need to remove this bolt and let the oil drain out completely before refilling and restarting your bike.

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zamboni920
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Re: 84 GL1200 oil drain plug

Postby zamboni920 » Sun Feb 19, 2012 7:30 pm

Thank you Wingadmin.....just what I needed. I don't know what I unscrewed either, and I hope what came out was indeed engine oil, and not something else. ----- Ron White: "Ya can't fix stupid"------
Will drain and refill tomorrow if time allows.

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SilverDave
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Re: 84 GL1200 oil drain plug

Postby SilverDave » Sun Feb 19, 2012 8:33 pm

WHEN you finally find the correct drain plug... That oil you added has barely been used... drain it into a clean container ( I use a shallow ice cream plastic bucket ).

Then check it for obvious particles , and add about a quart of MMO ( Marvel Mystery Oil) and then use the slightly used, freshly drained oil to top it up to the correct (3.5 l) level, and run it around for a few hundred km.
Then drain, and get a new filter, and throw the drained oil / MMO mix away ( I use a oil recycler near me )

MMO will scour your engine, bringing all sorts of terrible looking sludge from the starter pawl, and the inner oil galleries .

Its truly amazing !!

That way your over added oil will not be totally wasted.

I usually do this " Cleaning " every spring, but I use the cheapest truck oil ( no additives ) that I can find .

If I understand just what you did , you will have a liter or two of oil not used, if you have added a liter of MMO.

Use this as a " rinse ".. to get rid of the last traces of MMO..... adding it to your engine, starting it for 10 seconds or less, just to mix it around ... then drain, and dispose of.

SilverDave

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zamboni920
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Re: 84 GL1200 oil drain plug

Postby zamboni920 » Sun Feb 19, 2012 9:52 pm

SilverDave....that is a great idea. One reason, beside time beeing due, for oilchange is to hopefully aid the starter turning engine when hot. Yes, I got that infamous "slow starter when hot" syndrome of the '84 GL1200. I read somewhere (maybe on this forum) that a couple frequent oilchanges might help, rinsing out sludge. Also I am putting in 10-W40 instead of the recommended 10-W50. Apparently the slightly lighter oil also will help. How about using some Seafoam as an additive, in lieu of MMO ?

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SilverDave
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Re: 84 GL1200 oil drain plug

Postby SilverDave » Mon Feb 20, 2012 4:42 am

Yes.. a half can of Seafoam in the oil, the rest in the gas tank is considered ok...
. but only for 100 to 200 miles...

It does not make a good " Protecting" oil film.... so 100 miles ( say) and drain the oil...

Ditto for the tank Seafoam ( so i've read ) add it, run it thru... and then add fresh gas to be sure its all gone ..


SilverDave

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WingAdmin
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Re: 84 GL1200 oil drain plug

Postby WingAdmin » Mon Feb 20, 2012 10:11 am

Yup, I run the Seafoam through the crankcase at least once a year (although for more like 20-30 miles, rather than 100). Good idea!

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seabee_
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Re: 84 GL1200 oil drain plug

Postby seabee_ » Mon Feb 20, 2012 2:34 pm

Just watch out for that hot exhaust pipe after running it to warm the oil. OUCH :oops: Been there, done that. :lol:
Paul
CE1 Navy Seabees/RET
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ASE Mechanic

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zamboni920
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Re: 84 GL1200 oil drain plug

Postby zamboni920 » Mon Feb 20, 2012 5:17 pm

hehe Seabee.....done that too many times myself, staying away from anything that might be too hot to touch. Thanks to all for help, good advice and comments.

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trukr
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Re: 84 GL1200 oil drain plug

Postby trukr » Mon Feb 20, 2012 9:05 pm

Good luck with the starter. I don't think that an oil change will help that. Thats just a sign that you need to trend to your starter b4 it leaves you stranded somewhere.




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