hydrolocked engine grrrrrrrrrrrrrrr

[yorkie_chris]

Originally Posted by andrewsmith

Sadly yes as engine oil is more dense and compresses less easily than petrol.
Engine oil would theoretically combust under very high pressure/ compression

Doesn't matter, liquid is incompressible* whatever it is. It is just as bad when carb sticks and fills cylinder with petrol. Plus density is not related to compressibility.




*Don't be pedantic or daveprestons horse outside will kick you in de face

[yorkie_chris]

Originally Posted by farquare

i've pretty much resigned myself to the worst by now, looks like no biking for me this year.

thanks for the replies and suggestions.

Clean the carb out. Oil is pretty sticky and can prevent fuel flow through small jets.

Take it you have tried cranking it with plug out to try clear it?

[andrewsmith]

Originally Posted by yorkie_chris

Doesn't matter, liquid is incompressible* whatever it is. It is just as bad when carb sticks and fills cylinder with petrol. Plus density is not related to compressibility.

*Don't be pedantic or daveprestons horse outside will kick you in de face

No intention of being pedantic on this mate.

Is that the new name for the SV650?

[yorkie_chris]

I was waiting for some f***er to chime in with fact that liquids are to some minor extent compressible.

But anyway you made couple of points in that earlier post that were incorrect. I know you are trying to help but please do more research before stating things as fact.

[farquare]

Originally Posted by yorkie_chris

Clean the carb out. Oil is pretty sticky and can prevent fuel flow through small jets.

Take it you have tried cranking it with plug out to try clear it?

yeah, thats how i got all the oil out the cylinder. I can physically see fuel droplets in the top of the front carb when i'm turning it over.
i have sprayed a bit of carb cleaner in the front carb, would you recommend stripping it down?

[yorkie_chris]

If there are no nasty noises and it seems to run ok (but on 1 pot) then it is likely all just fouled up. To strip carb would work, try just seal your hand against it and crank. Careful cos there is quite some suction.

Sounds daft but what happens with choke on?

[farquare]

Originally Posted by yorkie_chris

If there are no nasty noises and it seems to run ok (but on 1 pot) then it is likely all just fouled up. To strip carb would work, try just seal your hand against it and crank. Careful cos there is quite some suction.

Sounds daft but what happens with choke on?

Perhaps a little ray of light.....

as above, no nasty noises or vibrations, it's just running on 1. I have experienced running on 1 a few years ago that i managed to narrow down to a spark plug failing under pressure, i've ruled that out this time by swapping plugs over and both plugs work in the rear cylinder.

you mean just put my palm over the front carb and crank?

with choke on the bike runs, idle is a bit low on full choke (but it's running on 1). With the rear plug disconnected the engine does change tone with choke on/off but won't fire on the front only.

[yorkie_chris]

so you saying it runs with rear plug disconnected?

[farquare]

no, sorry that last sentence should have read;

when cranking the engine with the rear plug disconnected, turning the choke on and off changes the engine tone but the engine does not fire

We get some right bolox posted on these threads sometimes. How the f**k you can diagnose with certainty a bent con rod, 'cos a starter motor tried and failed to turn over a hydrolocked engine, completely f**~**g beats me!

It's had a shock, a bang and a fall, and it's been upside down and it's now firing on one cylinder. There are are loads of possibilities of what it could be, of which a bent con rod is just one, given what we know that's very unlikely!

Farquare, ignore everyone else on this thread except YC whilst he takes you through a process of elimination, and don't think about scrapping your bike just yet!

Originally Posted by yorkie_chris

I know you are trying to help but please do more research before stating things as fact.

I'd say if you have to do research, don't post at all. The OP is perfectly capable of doing his own research, and posted the question because he wanted answers from someone who knows what they are talking about without having to research it.