Got a Cracked Coil on my 83 GL1100 Interstate


Information and questions on GL1100 Goldwings (1980-1983)
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dwight007fchr
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Motorcycle: 1983 1100 Goldwing Interstate

Got a Cracked Coil on my 83 GL1100 Interstate

Postby dwight007fchr » Sun May 22, 2011 10:03 pm



I have been doing extensive repairs on my 83 GL1100 Interstate, and today while putting the radiator back in (after replacing timing belts, adjusting valves, etc.), I noticed the right coil closest to the radiator overflow resevoir has a pretty ugly looking crack running down its length. Here is a pic:

The bike seems to run fine.....so, shall I just mix up some epoxy and close up the crack or crack open my empty wallet in search of funds for a new coil?

The Coil number is BW82-TRI, made by "TEC". If the "82" is the date made, these coils are probably original.

dc.
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Cracked Coil
Cracked Coil



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virgilmobile
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby virgilmobile » Mon May 23, 2011 8:18 am

I'm cheap.Clean the dirt out,mix up some JB Weld,and fill it.If it(the crack)allows moisture in,it can corrode the windings and arc out.Allow to cure for a day then re-test.Check the spark.

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WingAdmin
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby WingAdmin » Mon May 23, 2011 9:12 am

Yeah, I'd say the same. If the epoxy doesn't work, then think about replacing, but JB Weld is cheap, and it works.

dwight007fchr
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Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby dwight007fchr » Mon May 23, 2011 5:40 pm

Thanks Virgil and Wing.......I think I will give it a try....who knows, maybe it will last another 20 years. Whats the best way to check the voltage output to the plugs? Would be great if I could test the amount of volts/amps going to each cylinder to verify that this coil isnt getting weak.

Thanks.
dc

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dnehasert
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby dnehasert » Tue May 24, 2011 8:28 am

I've bought used coils from EBAY and work well if the JB Weld does not hold.

dwight007fchr
Posts: 434
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby dwight007fchr » Tue May 24, 2011 11:33 am

Dnyehast.....thanks....yep, I checked Ebay, and they have used ones there at decent prices. Do you know the best way to test the coil output? What setting would I put my voltage tester at to do a test.......I will have to dig into this as it would be nice to see if the cracked coil is putting out enough Tesla volts/amps.

dc.

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virgilmobile
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby virgilmobile » Tue May 24, 2011 12:59 pm

I doubt that you would have the equipment to measure the spark voltage.2 options..Go to a mechanic shop,ask then to test each coils spark voltage(25-40 thousand volts)..or...pull one wire from that coil,put on a spare plug,crank it over and LOOK at the spark.Do the same on the other coil for comparison.Start it in the dark and look for arcing out of the coil,caps and wires.My 83 will draw a spark right out of the plug cap(knocked me to my knees) Remember ,do only one plug at a time.A mechanic shop should have the scope to measure the peak spark volts on each coil but may charge for the time.

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby dwight007fchr » Tue May 24, 2011 5:20 pm

Virgil......Thanks for the comment. I will give that a try when I have all back together and ready for the fire-up. Will turn the lights out and check the spark in the dark as you said. I hope I dont see any arcing coming out of the cracked coil, and hopefully the same blue-hot spark on all plugs. I will try to remember to stand in a tub of water as Im "conducting" the experiment......better yet, maybe run a #4 copper wire from the tub of water to my house ground rod to get even better grounding as the spark jumps from the coil to me to my wet feet to the copper wire and on to the ground rod. Electrifying times ahead!

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virgilmobile
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby virgilmobile » Tue May 24, 2011 5:36 pm

Yea buddy.Gives a whole new meaning to the word 'megahertz'.
If you wanted to push the testing a little further,Get a misting spray bottle,lightly mist the coil packs,wires and plug caps(with the big rubber boot off).If the insulating integrity is OK,it wont arc out,but it will show a weak area fast.

Oh,by the way,between the plugs there is a drain hole that runs through the block that gets plugged up and lets water set around the plugs.
I usually remove the large boot that is there to get a better look at the plug caps.Just don't get the wires reversed.

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby dwight007fchr » Fri May 27, 2011 8:58 pm

Virgil.......Thanks for that "misting" tip. Drain holes....yep, I already checked all of them, and ran a piece of wire thru them to be sure nothing was clogging them.

Another tip.......regarding unclogging drains. I noticed that my battery was leaving small amounts of battery acid dripping down on the chrome muffler. The first time I thought the battery was a bit overfilled and I used a syringe to remove a bit of fluid from the battery. Drove her on a small trip, and again noticed some fresh acid drops on the muffler. Had to get the backing soda out once again and flush and scrub with backing soda all the metal areas around and under the battery. I was thinking that maybe there was a hairline crack in the battery, but I found the problem last week. The battery drain line was clogged at the very bottom.......one of those dern bees that always fills mud into round cavaties after stuffing a bug or worm in first did this job to the bottom of the battery overflow line. Used a piece of wire to unclog and then flushed some water thru the tube. Honda should have made small snap-on screens for all the drain tubes.

As the battery charges when driving, those hydrogen bubbles have to escape, and with the tube clogged, I guess they were pushing acid solution out the top plugs.

At least I found the problem before the acid did major corrosion issues to the frame and mufflers.

dc

bobtail18
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby bobtail18 » Mon May 30, 2011 11:31 am

I'm newbie and still learning. What is that black rectangular box on the left and that smaller square one right above it? Tx

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WingAdmin
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Re: Got a Cracked Coil on my 83 GL1100 Interstate

Postby WingAdmin » Mon May 30, 2011 5:02 pm

bobtail18 wrote:I'm newbie and still learning. What is that black rectangular box on the left and that smaller square one right above it? Tx


The larger black box with "OKI MPS-351B" on it is the spark ignitor.

The smaller square black box is the turn signal flasher. The original one is a cylindrical aluminum can, the one in that picture is an aftermarket flasher that someone has put in there.




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