crankcase volume?

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70sbudget
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crankcase volume?

#1

Post by 70sbudget »

if someone were to fill a crankcase, how much fluid would it take? fill as in soak the bearings and hope to break them free.

1 gal
2 gal
4 gal?
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dontwantapickle
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Re: crankcase volume?

#2

Post by dontwantapickle »

I have no idea how much fluid that it would take to fill your crankcase,
but I do have a few questions:
. why do you think that it's stuck bearings causing seizure?
. was there any oil in the engine when you brought it home?
. did you take the heads off yet?
. if some miracle happens, and your engine does free up without you knowing why... could you ever trust it on a long trip?

If it were me,
Any issues with the crank bearings on a $250. bike would have me looking for a functioning replacement engine or even another bike in better condition.
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Re: crankcase volume?

#3

Post by Oldewing »

Prolly 6 qts should be lots.


Let her sit (as long as you like) and bump it in high gear to rock it loose.
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Re: crankcase volume?

#4

Post by pidjones »

MUCH higher probability of stuck rings. Bearings are pretty well protected by oil film, plus the surfaces are not corrosive. If you suspect bearings siezed, toss it. Gears however will correde - and if they do they are junk.
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70sbudget
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Re: crankcase volume?

#5

Post by 70sbudget »

dontwantapickle wrote:I have no idea how much fluid that it would take to fill your crankcase,
but I do have a few questions:
. why do you think that it's stuck bearings causing seizure?
. was there any oil in the engine when you brought it home?
. did you take the heads off yet?
. if some miracle happens, and your engine does free up without you knowing why... could you ever trust it on a long trip?

If it were me,
Any issues with the crank bearings on a $250. bike would have me looking for a functioning replacement engine or even another bike in better condition.
Great questions!

Pistons soaked for almost two weeks and no dice on freeing up. Crank case had oil in it which had a faint smell of gas. There is what appears to be slight copper color to the oil in the light. There look to be c a silica type substance in the oil which might be copper, can’t tell. As of now it won’t roll in 5th with the plugs out after lots of efforts and time. The belts have been removed and both valve trains turn and do not bind. Heads are in the process of being pulled.

Can you trust any bike that you didn’t build from the bottom up? At 40 years old we take our chances with all of them. They are machines and machines have moving parts which sometimes break or bind regardless of age or maintenance. My buddy who threw a rod driving his new car off the lot or the timing belts in my commercial vehicles that have snapped below 20k on mileage.

I have sourced another motor and am negotiating but even that one is a motor and could have issues.

I have two little guys who can learn from exhausting all possibilities causes as opposed to just going with the “let’s just buy another “ mentality of today but even if we do buy another, we can still learn from this one.
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dontwantapickle
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Re: crankcase volume?

#6

Post by dontwantapickle »

70sbudget wrote: I have two little guys who can learn from exhausting all possibilities causes as opposed to just going with the “let’s just buy another “ mentality of today but even if we do buy another, we can still learn from this one.
Fair enough!
If you are fixing this bike as an "learning experience" for your kids, I say Go For It!
Nothing beats hands on problem solving.
(Just let us know how much it ended up costing you when you're finished. - a full rebuild ain't gonna be cheap)

FWIW, If there truly is shell bearing copper in your oil, no amount of soaking is going to fix that.
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Re: crankcase volume?

#7

Post by 70sbudget »

dontwantapickle wrote:
70sbudget wrote:
Fair enough!
If you are fixing this bike as an "learning experience" for your kids, I say Go For It!
Nothing beats hands on problem solving.
(Just let us know how much it ended up costing you when you're finished. - a full rebuild ain't gonna be cheap)

FWIW, If there truly is shell bearing copper in your oil, no amount of soaking is going to fix that.
Fair enough x2! If it is the bearings it won’t fix it but it may help break it loose. That’s all I’m looking for at this point.
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Re: crankcase volume?

#8

Post by pidjones »

Before getting into filling the case with MMO, how about getting those heads off?
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Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
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Ex '77 GL1000
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70sbudget
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Re: crankcase volume?

#9

Post by 70sbudget »

I was going to put Diesel in there for now. And heads are in their way off
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ericheath
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Re: crankcase volume?

#10

Post by ericheath »

Suggestion I’ve suggested before because I read it somewhere. The person filled the crankcase to as much as it would hold with peanut oil heated to 350 degrees or so. He said freed up right away. Speculation was the heat and disimilar metals expanding at a different rate broke the frozen together parts. That could be wrong, but my gut says this is worth a try.

This would have to be done very carefully, especially with little eyes watching. The poster heated it up in his turkey deep fryer. I don’t recall how he filled it, but it’s a novel way that hasn’t been tried much to my knowledge.

It could be any kind of oil that could maintain a higher temp.

I’m with Rat(or little Brother Oldewing anim-cheers1 ) on contents, maybe even more than six quarts.

I’m more in favor of the 1200 swap.
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Re: crankcase volume?

#11

Post by Sidecar Bob »

70sbudget wrote:Pistons soaked for almost two weeks and no dice on freeing up.
Mine sat for a long time before the guy I got it from got it and he sold it to me because he couldn't get the engine unstuck by soaking it. I didn't bother because I was going to put the engine from my wreck in it but the guy that ended up with the engine had no problem freeing it up because he knew the trick: You need to make sure the penetrant reaches the entire ring to free it up and it won't if the engine is upright because the spark plug hole is in the middle of the combustion chamber. He put his penetrant of choice (furnace fuel oil) into the left cylinders with the engine standing on its right side for a week, then repeated for the right cylinders with it standing on the left side.
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Re: crankcase volume?

#12

Post by 70sbudget »

Interesting observation on spark plug location!!!! I don’t have room in the garage to lay it down so I’ll have to get creative what that.
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Re: crankcase volume?

#13

Post by 70sbudget »

Just a follow up post as I hate getting hooked on a post with no finish.

So the little men and I took the right side head off this weekend.

After the discouraging and dumbfounding findings, we did have success resulting in the pistons moving.

With the head pulled, cylinder cleaned, LOTS of patience and heat applied with a torch, penetrant applied again, walnut hardwood block meets 3 lb sledge and we have movement.

We had laughs, took organization, chemicals and physics lessons and at the end of the day, we made memories, learned lessons and had successes.
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