Author Topic: Hydrolock, but no damage?  (Read 251 times)

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Offline Richie

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Hydrolock, but no damage?
« on: September 23, 2018, 09:26:14 pm »
Hello,
So I went to start the C10 today, and there was a loud crack/pop sound and it stopped cranking. So I hit the starter again (probably ill-advised) and it tried to crank but would not. So I hit it a 3rd time (again, probably not the best idea), but this time it fired right up. I didn’t hear any strange noises from the engine once it was running, and I noticed no issues/changes in performance, even when I took it to 9000rpm on the highway.
Is it possible that the hydrolock didn’t damage anything?
Would a bent rod have an immediately noticeable effect?
I’ll do the rod test if I have to.

Oh, and it definitely was a hydrolock... checked the petcock after the ride; it’s dripping. -.-

Offline MAN OF BLUES

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Re: Hydrolock, but no damage?
« Reply #1 on: September 23, 2018, 10:15:17 pm »
fuel in the airbox is also really good indication...
don't ride it until it's remedied, don't continue to start and run it. Remove the tank to prevent further events.

no good can come from attempting to ride it until it's remedied.
even if it didn't bend a rod, it may at some point... and hitting 9k rpm, isn't a wise thing to do when you are 'testing it'.



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Offline Richie

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Re: Hydrolock, but no damage?
« Reply #2 on: September 23, 2018, 10:23:27 pm »
Already disconnected the fuel line and ordered a rebuild kit.
I will say that I didn’t take it straight to 9000rpm. I incrementally increased rpm throughout the 5 hour ride, maxing out at 4K, then 4500, then 5k, while listening for any unusual noises.

Offline Richie

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Re: Hydrolock, but no damage?
« Reply #3 on: September 23, 2018, 10:24:30 pm »
It’s just interesting that there was no fuel on the ground or leaking from the air box... the bike was sitting for 18 hours before I tried to start it. Seems to be a very slow leak.

Offline MAN OF BLUES

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Re: Hydrolock, but no damage?
« Reply #4 on: September 23, 2018, 10:38:11 pm »
hydrolok occurs because the float valve in 1 or more carbs, is not shutting off the flow of fuel
into the float bowl.... it is not a product of a faulty petcock, but then again, a faulty petcock will feed the issue.... the float needle being hung up because of debris, or wear, is why fule flows into a cylinder, creating the hydrolok. It may occur without having fuel on the floor, as it had not completely filled the cylinder yet, and at that point, it will flow from the rear of the offending carb, and leak into the airbox... your's just had not sat long enough to have the 'visible' fuel running out of the box.

that said, address the malfunctioning float valve, in the appropriate float bowl, as that is the cause....
You may not have bent a rod, I've hydro'd a couple times due to a faulty float, but sooner or later, you will bend a rod... it may not be bad enough to tell from the performance, or degradation as a result, many of these bikes do have slight damage, and still run fine... but, the piston height check will tell you how bad, if any, the damage may be.

30 YEARS OF KAW.....Rich R. (the other one..)  COG 5977  JUSTAMEMBAHNOW
and if you are gonna call me names... it's MR. Analdweeb if you please...

Offline Richie

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Re: Hydrolock, but no damage?
« Reply #5 on: September 23, 2018, 11:25:26 pm »
I installed all new floats to keep hydrolock from happening, and it worked fine for awhile... I don’t know what changed.
How do I tell which valve is leaking?

Offline Mettler1

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Re: Hydrolock, but no damage?
« Reply #6 on: September 24, 2018, 03:16:49 am »
  If you didn't have a hydrolock episode you got real damn lucky and didn't destroy an engine!!  All those things you say you did to prevent hydrolock can happen again. :'(

   You real need overflow tubes to keep the fuel from getting into the cyls. New float valves can hang up !! >:(


   https://sites.google.com/site/shoodabenengineering/intake-and-exhaust
'94 Concours 115,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,SiSF'sTorque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators, SiSF carb Spa, Delkevic exhaust, Murphs' knee savers +grips, etc

Offline jettawreck

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Re: Hydrolock, but no damage?
« Reply #7 on: September 24, 2018, 12:07:16 pm »
I installed all new floats to keep hydrolock from happening, and it worked fine for awhile... I don’t know what changed.
How do I tell which valve is leaking?

Any small particle or random event can cause a float valve to stick. It only takes one/once to ruin the engine. Overflow tubes are the only positive prevention measure to prevent a hydrolock event. Tubes won't prevent a petcock or float valve event failure, but at least the engine will not be damaged.
Carefully measure your piston heights now.
Snowmobiles, I have a bunch.
Motorcycles-I haven't had anything except dirtbikes 30 years ago, so this will be all new to me.
2005 C10 with Rifle w/s, SISF Exhaust sprocket, overflow tubes, 2 minute jet mod. (SOLD)
2004 Honda ST1300-the current mule.

Offline Mettler1

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Re: Hydrolock, but no damage?
« Reply #8 on: September 24, 2018, 12:27:57 pm »
I installed all new floats to keep hydrolock from happening, and it worked fine for awhile... I don’t know what changed.
How do I tell which valve is leaking?

Any small particle or random event can cause a float valve to stick. It only takes one/once to ruin the engine. Overflow tubes are the only positive prevention measure to prevent a hydrolock event. Tubes won't prevent a petcock or float valve event failure, but at least the engine will not be damaged.
Carefully measure your piston heights now.


  Hydrolock test video.


https://www.youtube.com/watch?v=4W6k3pTdAXw&feature=plcp

'94 Concours 115,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,SiSF'sTorque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators, SiSF carb Spa, Delkevic exhaust, Murphs' knee savers +grips, etc

Offline MikeH_OH

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Re: Hydrolock, but no damage?
« Reply #9 on: September 24, 2018, 02:55:09 pm »
Which hole is at fault? I have had three different ones act up . First - do not start the bike. Pull the plugs and see which one is wet with gas. problem solved... this time.