Engine locks up with transmission in gear

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MikeNTexas
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Engine locks up with transmission in gear

#1

Post by MikeNTexas »

I'm going to start from the beginning. I acquired a 1976 project in pieces and the first thing I did was to rig the engine up on a test stand so I could see if and how good it ran. I ran it for a while and all was good so I cleaned it up, repainted it, replaced the water pump and installed new timing belts and idlers. After replacing the belts I pulled the spark plugs and turned the engine over with a wrench on the crank bolt. It only turned about 90 degrees and stopped. I double checked the cam timing and all looked good. I found out that the tranny was in gear so I found neutral and now the engine turned freely. I found out that the higher gear I put it in the less the engine would turn. In 5th gear it would only turn about 10 degrees. That has led me to believe something is loose inside locking up the output shaft. Suspecting something might have fallen in through the filler hole I rolled the motor over upside down and turned the crankshaft. It turned freely without locking up! So I rotated it back to right side up and when I turned the crank it locked up again. After a few times of rotating the engine to different angles to see when it locks up I now can't get it to lock up. The crank turns freely all the time. What the heck could be causing this?
1975 GL1000 (it’s a keeper)
1983 GL1100 Custom (sold)
1976 GL1000 Project (finished and sold)
Another1976 GL1000 Project in the works
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Whiskerfish
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Re: Engine locks up with transmission in gear

#2

Post by Whiskerfish »

Take off that little cover by the output shaft and look in there
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!
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gltriker
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Re: Engine locks up with transmission in gear

#3

Post by gltriker »

Remove the rectangular engine oil strainer screen cover on the bottom right side edge of the crankcase, too.
A Best Practice to remove and inspect the screen anyways. tumb2
Last edited by gltriker on Fri Sep 17, 2021 11:24 pm, edited 1 time in total.
Cliff

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
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^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Don R
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Re: Engine locks up with transmission in gear

#4

Post by Don R »

Was the starter installed? The drive gear hangs on a chain and can swing around in there.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.
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Whiskerfish
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Re: Engine locks up with transmission in gear

#5

Post by Whiskerfish »

The output shaft just pulls out of that gear inside the case. The shaft is what centers that gear and holds it in place. If the shaft was removed and the engine moved around then it would have allowed that gear to move around. Need to remove that little side cover and realign the gear and the output shaft and see if the problem is resolved. "If" that is the problem then it is a very easy fix.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!
MikeNTexas
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Re: Engine locks up with transmission in gear

#6

Post by MikeNTexas »

Whiskerfish wrote: Fri Sep 17, 2021 1:35 pm Take off that little cover by the output shaft and look in there
I'll give that a look.

gltriker wrote: Fri Sep 17, 2021 1:46 pm Remove the rectangular engine oil strainer screen cover on the bottom right side edge of the crankcase, too.
A Best Practice to remove and inspect the screen anyways. tumb2
Had it out to clean it. I'll pull it back out and take a look in there.
Don R wrote: Fri Sep 17, 2021 10:02 pm Was the starter installed? The drive gear hangs on a chain and can swing around in there.
Starter is still installed

Thanks for the suggestions. There has got to be something floating around inside. Even though I can't get it to lock up now I'll to everything I can to find the offending party. I had ran it a while and went through the gears with it on the test stand with no problems but when I had it upside down to replace the water pump whatever is in there must have fallen into the gears.
1975 GL1000 (it’s a keeper)
1983 GL1100 Custom (sold)
1976 GL1000 Project (finished and sold)
Another1976 GL1000 Project in the works
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Re: Engine locks up with transmission in gear

#7

Post by Don R »

That sucks.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.
MikeNTexas
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Re: Engine locks up with transmission in gear

#8

Post by MikeNTexas »

I pulled out the oil strainer and looked inside and found this broken off piece Anyone recognize it?
14A8A443-E19A-4BC5-B314-099F16124306.jpeg
51AE91DE-7BDC-4EA0-B740-6D07276E4A62.jpeg
A5DD2B87-B01A-4CDE-94F9-A642070ADF5C.jpeg
F27F9770-ED29-453C-A0A6-137FF095FF5E.jpeg
You do not have the required permissions to view the files attached to this post.
1975 GL1000 (it’s a keeper)
1983 GL1100 Custom (sold)
1976 GL1000 Project (finished and sold)
Another1976 GL1000 Project in the works
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Re: Engine locks up with transmission in gear

#9

Post by Rat »

Nope, was chipped off a thick something or other, looks like the edge of a hole in a case or somesuch ...

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Whiskerfish
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Re: Engine locks up with transmission in gear

#10

Post by Whiskerfish »

Interesting shape but no I have no idea right now.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!
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Old Fogey
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Re: Engine locks up with transmission in gear

#11

Post by Old Fogey »

Did you only find two pieces, as there is just about 180 degrees of the hole, so another 180 somewhere either still attached or stil floating around in there. I don't remember (from my travells) how big a one cent coin is. Can you put a ruler beside them? Also try to size the hole with a drill on the larger piece.
"Impossible Is Just a Level of Difficulty!..."
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gltriker
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Re: Engine locks up with transmission in gear

#12

Post by gltriker »

Is it attracted to a magnet?
Cliff

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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Re: Engine locks up with transmission in gear

#13

Post by Old Fogey »

Oh, my mistake, reading the post again. There's only one piece?
"Impossible Is Just a Level of Difficulty!..."
If I'd wanted you to understand, I would have explained it better! (Johann Cruyff)
I’d give my right arm to be ambidextrous! :-D
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Old Fogey
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Re: Engine locks up with transmission in gear

#14

Post by Old Fogey »

I can't think of anything like that, but assuming it actually belongs in the engine, regardless of what it is, something had to have hit it to break it off which means there has got to be other faults inside.
"Impossible Is Just a Level of Difficulty!..."
If I'd wanted you to understand, I would have explained it better! (Johann Cruyff)
I’d give my right arm to be ambidextrous! :-D
MikeNTexas
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Re: Engine locks up with transmission in gear

#15

Post by MikeNTexas »

Old Fogey wrote: Mon Sep 20, 2021 3:59 pm Did you only find two pieces, as there is just about 180 degrees of the hole, so another 180 somewhere either still attached or stil floating around in there. I don't remember (from my travells) how big a one cent coin is. Can you put a ruler beside them? Also try to size the hole with a drill on the larger piece.
There only the one piece. one cent is about 19MM in diameter.
gltriker wrote: Mon Sep 20, 2021 4:23 pm Is it attracted to a magnet?
It's aluminum. Not attracted to a magnet.

I have another engine that had some bad rust in one cylinder so today I took it apart. So far I can not find any of the casting that has the shape of this piece.
1975 GL1000 (it’s a keeper)
1983 GL1100 Custom (sold)
1976 GL1000 Project (finished and sold)
Another1976 GL1000 Project in the works
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