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Cleaning crank case - need to split it???

  • Thread starter Thread starter TheDuke
  • Start date Start date
T

TheDuke

Guest
Gentlemen,
I'm tearing the engine apart and plan to clean/lap the valves, degunk the pistons, rehone, etc. I'd like to clean the crank case with a solvent (or something) before reassembly but wasn't sure if the only way to do this effectively is to split it and pull its guts out. Ideas???

This is where she stands as of last night.


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Remove the hinge pins from each piston, be sure to replace the circlips (I have some if you want), scrape off the old gasket, clean up real well around the outside of the case and tops of the pistons, check everything using the Suzuki manual, and you should be good.

Take a look through my project thread as I discussed a lot of that as I was working on mine.
 
If you truly wish to clean out the crank case area, yes, you would need to split the cases.
However, unless the transmission imploded or a piston exploded there is not really a need to do so.
Do as cowboyup suggests and you will be GTG.
 
Here is the issue, when I removed the jugs some corrosion from one of the studs fell into #2. Not sure the best way to flush it out. A neighbor recommended diesel.
 
Wrist pins?

Hey Duke, how'd ya get that cam chain to stand straight up like that?

How bout trying to wash the crap out the crankcase using some motor oil? Splitting cases sucks -- actually the physical splitting part is kinda fun, it's the voyage there and back that sucks.

smiley-laugh-point-up-yellow.gif
 
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I realize it is too late, but put this in your lessons learned column:
Next time, stuff the crank with rags to prevent this from happening and to support the pistons as you work on them.
 
koolaid_kid said:
I realize it is too late, but put this in your lessons learned column:
Next time, stuff the crank with rags to prevent this from happening and to support the pistons as you work on them.
Click to expand...

I went ahead and stuffed it after pulling it apart, the debris fell in as I pulled off the jugs. I suppose will probably just grab some cheap oil and pour it in and slosh it around. It wasn't anything metallic or too destructive, fingers crossed.
 
I would first use a shop vac to try and suck everything out that it can reach. A crevice attachment might help if you have one.
And yeah, you have to stuff it with rags as the cylinder block is raised but not removed.
 
Grr...yeah, good life lesson I suppose. I'm just glad it isn't a tragic mistake. I will work on tidying it up when I get home tonight, thanks for the help fellas.
 
One reason was 75 psi in #2 and exhaust smoke which could have been a simple valve adjustment. Really though, I wanted the experience of tearing it down, cleaning it up, rebuilding the beast, and learning as I go.
 
You will certainly get more experience taking it all the way apart.

When I pull cylinders I do it with the engine on it's side so the crap around the studs doesn't fall into the cases. Harder to do if it's still in the bike.
 
Been there done that. If you haven't messed around too much with it and spread dirt everywhere remove the oil pan and after carefully picking out as much dirt as you can and hopefully not turning the crankshaft yet pour about gallon of solvent though the crankcase into a catch basin to flush the crankcase. If you think you've got all dirt out then do it again just to be sure, solvent is cheap. Then have somebody spin the crank and do it again and you should be good to go. It's definitely a judgement call on your part if and when you got it all but it should work. Immediately after your first startup change the oil.
 
Also, it was just a few crumbs, not a lot of debris. I was able to wipe/vacume it out and then poured about 2 quarts of oil all over the crank to clean it off, then I drained it. Solvent may not be a bad idea anyhow, it is a little grimey in there after 30k.
 
I would probably use Varsol, that is my opinion, it will clean out the area and it leaves things sort of oily, at least nothing will dry out and start rusting on you....

you can always pour some more oil afterwards and let it drain out overnight...

.
 
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