gl1000 head


Information and questions on GL1000 Goldwings (1975-1979)
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dalewinslow
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gl1000 head

Postby dalewinslow » Wed Sep 25, 2013 5:08 pm



any tips for removing a 77 gl1000 left head that seems glued on somehow?? don't want to crack anything by prying with chisel. manifolds, bolts etc. have all been removed but it still wont budge.



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Placerville
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Re: gl1000 head

Postby Placerville » Wed Sep 25, 2013 5:57 pm

Don't insert any sharp metallic tool into the gasket joint as you may damage the surfaces. First, try applying a 50/50 mixture of Acetone and ATF around the joint and bolts. This mixture has been proven to penetrate better than any 'off the shelf' products like Liquid Wrench, PB Blaster etc. There's no harm in trying this as it may help a bit. Apply it repeatedly over 48 hours or so. Then, using a large heavy rubber mallet, try to break the seal by striking the head repeatedly around its circumference. It will take effort and time so, be patient. If that doesn't work, move to a large plastic headed hammer that will provide more impact but, whatever you do, don't use a metal hammer. The last method is an old 'automotive' trick which is, cranking the engine over. Sometimes the head will pop right off. (Don't forget to hit your 'kill switch' first.) I have no other suggestions if these methods don't work. Perhaps someone else has a 'bingo' method that they've used successfully.
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dingdong
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Re: gl1000 head

Postby dingdong » Thu Sep 26, 2013 6:28 am

Often overlooked is the 10mm bolt at the bottom of the head. Just saying.
Tom

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wjnfirearms
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Re: gl1000 head

Postby wjnfirearms » Thu Sep 26, 2013 8:06 am

One thing you could try, but I'd be careful with here, is ammonia. A friend who is a diesel mechanic showed me this trick for loosening rusted bolts. The stuff actually works, sometimes better than penetrating oil. It should penetrate that gasket material.

Dingdong, keep saying. Hidden fasteners can be frustrating. I went through this trying to take an intake manifold off of a Pontiac V-6. Drove me crazy until I found one 10mm bolt hidden away in the front by itself.
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dalewinslow
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Joined: Fri Jul 13, 2012 2:15 pm
Location: Chicago, Illinois
Motorcycle: Twin 1977 gl1000's

Re: gl1000 head

Postby dalewinslow » Thu Sep 26, 2013 10:37 am

never heard of acetone & atf?? but cranking over with plugs in is a good one. rockers are backed off so no interference. already tried hammers but seems like not enough force.

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Placerville
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Re: gl1000 head

Postby Placerville » Thu Sep 26, 2013 12:01 pm

A study done in the April 2007 issue of Machinist's Workshop magazine looked at different penetrating oils to see which one did the best job of freeing a rusted bolt by measuring the pounds of torque required to loosen the bolt once treated. The study was scientifically based and accurate. They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.

A summery of the results are as follows:

Penetrating oil.......Average load.......Price per fluid ounce
None...................516 pounds...........$0.0
WD-40.................238 pounds...........$0.25
PB Blaster.............214 pounds...........$0.35
Liquid Wrench.......127 pounds...........$0.21
Kano Kroil............106 pounds...........$0.75
ATF-Acetone mix....53 pounds............$0.10

The ATF-Acetone mix was mixed 1 to 1 ratio.
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Matrix110
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Re: gl1000 head

Postby Matrix110 » Tue Oct 01, 2013 9:25 am

ATF-Acetone mix....53 pounds............$0.10


What Is ATF :?:

FDReik
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Re: gl1000 head

Postby FDReik » Tue Oct 01, 2013 9:41 am

Automatic Transmission Fluid

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Matrix110
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Re: gl1000 head

Postby Matrix110 » Tue Oct 01, 2013 9:50 am

Dang, should have known that!

Thanks

tinkertoys
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Re: gl1000 head

Postby tinkertoys » Tue Oct 01, 2013 2:30 pm

Excellent tidbit.
I will be storing that little note on my shelf beside all mt pricey cans. Thanx.

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Maddogg
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Re: gl1000 head

Postby Maddogg » Fri Oct 04, 2013 8:33 pm

Will the acetone melt the plastic bottle if I put it in one? Not everyone has accesss to pressurized containers that can be filled. Like an old Windex bottle or something? Acetone, whenever I have bought it, always comes in a metal can. Just wondering. I have used PB blaster for years. Never payed attention to the torque specs.

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WingAdmin
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Re: gl1000 head

Postby WingAdmin » Fri Oct 04, 2013 10:13 pm

Maddogg wrote:Will the acetone melt the plastic bottle if I put it in one? Not everyone has accesss to pressurized containers that can be filled. Like an old Windex bottle or something? Acetone, whenever I have bought it, always comes in a metal can. Just wondering. I have used PB blaster for years. Never payed attention to the torque specs.


Depends on what kind of plastic the bottle is made of. Acetone will melt polypropylene, polycarbonate, and polystyrene, among others.

dalewinslow
Posts: 6
Joined: Fri Jul 13, 2012 2:15 pm
Location: Chicago, Illinois
Motorcycle: Twin 1977 gl1000's

Re: gl1000 head

Postby dalewinslow » Sat Nov 23, 2013 8:31 pm

was finally able to remove head. acetone-atf worked great to make groove along top of gasket. after repeatedly soaking and tapping with putty knife at 45* angle she finally broke loose. now to replace bent exhaust valve and re. thanks for the tip gold wing docs. by the way when timing belt broke on 77 gw I NOTICED THAT THE ODOMETER was 83 miles off from the other 77 gw. what are the odds after 33000 miles???? the two bikes must be sisters in some other dimension.????




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