Sudden Engine Oil Leak from hydraulic clutch slave cylinder - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 14 (permalink) Old 08-09-2010, 11:26 PM Thread Starter
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Sudden Engine Oil Leak from hydraulic clutch slave cylinder

While on a 1700 mile ride at the Idaho Montana border I found a major oil gusher coming from the Clutch Slave Cylinder housing. Having no choice but to performk a road side fix, I created a makeshift gasket from shredded cigarette filters and ATV gasket silicone. (worked fine for 600 miles home, but the clutch slave cylinder is not working so well (can't over come crankcase oil pressure when oil is cold)

I originally suspected that there were o rings on the clutch push rod shaft that had let go, however upon returning home, my Clymer manual does not show any such o rings.

My next guess is that the Clutch Oil pressure relief is stuck open. I do not want to take the clutch covers off (gaskets are a week away) if I am wrong.

Anybody have any other suggestions before I start tearing things apart unnecessarily?

Oh yeah,,,,, 1993 VT1100

Thanks in advance
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post #2 of 14 (permalink) Old 08-10-2010, 02:28 AM
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I created a makeshift gasket from shredded cigarette filters and ATV gasket silicone. (worked fine for 600 miles home
===============================================
Man you get the Mc Giver award I believe all you need to do is rebuild it, sounds like the cup let loose, cracked. I'm not sure but I don't think you have to pull the side case to get to it, I think it's under the back half of the side case (part 1)
http://www.mrcycles.com/fiche_sectio...1993&fveh=3970

Ted
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post #3 of 14 (permalink) Old 08-10-2010, 07:35 AM
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Great roadside fix!

You're leaking engine oil and not clutch fluid, right?

You could be looking at a clutch pushrod seal failure. It's happened on every Honda I've owned that's had a hydraulic clutch. It's no an o-ring. It's a seal about 1.5" around, with a 1/4" hole in the center. The clutch fluid dissolves the seal over time, turning it into Jell-O.

Easy to replace, but like you said, you need new engine case gaskets and a Saturday to do it.

--Justin

Currently Running Stable:
2010 Honda NT700V
1986 Shadow 700
1986 Honda Trail 110 (Postie Bike)
1987 Honda Rebel 450
1973 Honda Mini Trail 50
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post #4 of 14 (permalink) Old 08-10-2010, 07:45 AM
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Possibly #23 in this diagram?



--Justin

Currently Running Stable:
2010 Honda NT700V
1986 Shadow 700
1986 Honda Trail 110 (Postie Bike)
1987 Honda Rebel 450
1973 Honda Mini Trail 50
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post #5 of 14 (permalink) Old 08-10-2010, 08:09 PM Thread Starter
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Hey thanks Tube!

I think you are right, going to do the tear down tonight, I don't remmeber seeing that seal in there, but I'll pay more attention this time.

It is definately Engine Oil, not clutch fluid...

As for the road side fix...us old farm kids have lots of tricks up our sleeves!

Thanks again for your help, I'll post my findings here in a few hours...hopefully
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post #6 of 14 (permalink) Old 08-10-2010, 10:23 PM
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I've replaced that seal on my '87 VT1100C, something's leaking though. I don't know if it's oil or break fluid.
And now I'm even more confused. How come engine oil leaks because of clutch slave cylinder seal?


1987 VT1100C Shadow Spirit
1997 VT1100C Shadow Spirit
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post #7 of 14 (permalink) Old 08-10-2010, 10:29 PM
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The seal believed to be leaking is not in the slave, it's the seal that seals the engine oil from coming out where the cross tube go from one side of the engine to the other to work the clutch, clutch is on the right and the slave is on the left, the slave pushes on the tube/bar and moves the clutch and there a lot of oil in between.

Ted
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post #8 of 14 (permalink) Old 08-11-2010, 01:18 AM Thread Starter
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I believe you are right...that seal does not look so great, although where it mates up with the crankcase looks to me like it would never hold back anything....

However, I am heading down to the dealers tomorrow am to see how long it will take to get a new seal...a whole 3.29 on Bike Bandit, but it won't be here until early next week, and the weather man is being nice for the next 5 days



Thanks for your help, I will post the results as soon as the seal arrives.
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post #9 of 14 (permalink) Old 08-12-2010, 12:48 PM
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Had almost the same problem on mine, Justin diagnosed it in a snap!
http://www.hondashadow.net/forum/viewtopic.php?t=93425

Nice work man!

'86 VT700C Shadow - Mine
'00 Suzuki Savage - Hers
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post #10 of 14 (permalink) Old 08-12-2010, 09:02 PM Thread Starter
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Replaced Seal, still leaking

OK, I replaced the seal, and still ourping oul out...seems I am missing something. In Justin's explaination, he describes a Half moon plate or crescent shaped plate to remove, and there is yet another seal behind it. Do I have to remove the crankcase cover to get at that second seal, as I do not see anything except the casting from inside the clutch slave cover. Perhaps there are subtle differences between the 500 and the 1100??

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