Seized Motor


Information and questions on GL1000 Goldwings (1975-1979)
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Barlow
Posts: 28
Joined: Fri May 17, 2013 9:53 pm
Location: Las Cruces, NM
Motorcycle: 1986 Yamaha Venture Royale
1983 Yamaha Venture Royale
1975 GL1000 GoldWing
1970 Honda CB750

Seized Motor

Postby Barlow » Thu Feb 25, 2016 7:58 pm



I have a 75 GL with a seized motor that is my project bike.
Due to a long distance move and a major surgery the bike sat for quite a while and now the motor won't turn over.
Normally on a seized motor I pull the plugs and pour in some penetrating oil.
After sitting awhile I usually am able to free the engine.
The Wing ,being an opposed 4 cylinder this procedure doesn't work.
Is there a trick with these motors that I don't know about without pulling the heads ?
Any help would be appreciated as I would like to get the bike running before riding season get here.

Happy trails,
Ben


Happy trails,
Barlow

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virgilmobile
Posts: 7654
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Seized Motor

Postby virgilmobile » Fri Feb 26, 2016 10:24 am

I suspect that you have removed all 4 plugs and tried to hand turn the engine...Just in case it's just hydrolocked.
Did this once..
Mix ATF and acetone...50/50...
Remove the 2 right plugs.Lay bike on the left side...
Add a good squirting of the mix in each cylinder..
Loosely put the plugs back.
Tilt the bike as far over as possible and let it rest at least 24-48 hours...
Repeat for the other side.
Take note...this mix may eventually end up in the exhaust header and engine oil.
Take all precautions for this and fuel spillage.

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Fred Camper
Posts: 1152
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Seized Motor

Postby Fred Camper » Sat Feb 27, 2016 9:19 am

You can try to turn using the kick starter, but the bolt on the front of the crank under the belt cover works best. It takes patience for sure. But once it soaks in, it can start to budge.

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Barlow
Posts: 28
Joined: Fri May 17, 2013 9:53 pm
Location: Las Cruces, NM
Motorcycle: 1986 Yamaha Venture Royale
1983 Yamaha Venture Royale
1975 GL1000 GoldWing
1970 Honda CB750

Re: Seized Motor

Postby Barlow » Sun Feb 28, 2016 10:28 am

Thanks for the response.
I guess I had a brain fart about laying the bike on its side.
Had not heard about the acetone/ATF mixture but knowing the properties of both it makes sense, thanks.
I try this next week when I have a little extra time.
Thanks again, I'll let you know how it works.


Happy trails,
Barlow


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