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30-04-09, 02:24 PM

Hi All,

Some of you might have been following my thread on the Ireland SV section;
http://forums.sv650.org/showthread.php?t=130385

but basically my SV650 2000 engine blew up. It started as a metal ticking, turned quickly into a loss of power and then sounded like 1000 spanners falling down metal stairs!

So I decided to drain the oil to look for metal bits, as recommended by a few people. What I found shocked me and I would like some opinions please.

I found no metal deposits at all, but the oil came out with some force, followed by petrol. The petrol tank had about 3-4 litres left in it when the engine blew but is now completely empty.

Is assume that the piston and input valve (front cylinder I think) are smashed and that petrol could freely flow out of the tank (does this not require a vacuum to suck it down the pipe??) through the carbs, into the inpput valve hole, past the piston seals (if the piston is still in one piece) and straight into the oil sump. Could this happen? Is it likely that the piston and valve are done or just the piston?

FYI, when I drained the oil it normally holds max 3 litres; I drained 6 litres out of the sump plug!!!.

Opinions welcome!!!!!!

Phil

30-04-09, 02:24 PM	#1
PhilCBR Guest Posts: n/a	Petrol tank emptied into oil sump Hi All, Some of you might have been following my thread on the Ireland SV section; http://forums.sv650.org/showthread.php?t=130385 but basically my SV650 2000 engine blew up. It started as a metal ticking, turned quickly into a loss of power and then sounded like 1000 spanners falling down metal stairs! So I decided to drain the oil to look for metal bits, as recommended by a few people. What I found shocked me and I would like some opinions please. I found no metal deposits at all, but the oil came out with some force, followed by petrol. The petrol tank had about 3-4 litres left in it when the engine blew but is now completely empty. Is assume that the piston and input valve (front cylinder I think) are smashed and that petrol could freely flow out of the tank (does this not require a vacuum to suck it down the pipe??) through the carbs, into the inpput valve hole, past the piston seals (if the piston is still in one piece) and straight into the oil sump. Could this happen? Is it likely that the piston and valve are done or just the piston? FYI, when I drained the oil it normally holds max 3 litres; I drained 6 litres out of the sump plug!!!. Opinions welcome!!!!!! Phil