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04 RXP Blown valves Check this out
- Thread starter BEEFCURTIN
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Dr Honda
Well-Known Member
My condolences.
From your last post, I knew that's exactly what happened.
In the world of high performance 4-stroke MX bikes... we see a lot of that. One thing in that comunity... that I don't see here, is that we check the valve clearances every 40 hours or so. Then, once we see the clearances closing up... we know to change the valves before one breaks off.
In the past, I've tried to tell people the importance of checking valve clearance regulartly... but it always falls on def ears.
Anyway... contact Millennium Technologies. They rebuild heads. They may be able to weld that up, re-machine the combustion chamber, and put in new valves.
From your last post, I knew that's exactly what happened.
In the world of high performance 4-stroke MX bikes... we see a lot of that. One thing in that comunity... that I don't see here, is that we check the valve clearances every 40 hours or so. Then, once we see the clearances closing up... we know to change the valves before one breaks off.
In the past, I've tried to tell people the importance of checking valve clearance regulartly... but it always falls on def ears.
Anyway... contact Millennium Technologies. They rebuild heads. They may be able to weld that up, re-machine the combustion chamber, and put in new valves.
BEEFCURTIN
New Member
Thanks for the info. The cylinder wall is still good, just glad a piece did not get inbetween there and ruin my bottom end!
Those are the exhaust valves that are bad. The guys at the SeaDoo dealer told me that the valves weren't hit by anything (piston, etc.) they didn't break, but instead the valve stem melted causing the end to fall into the cylinder.
They say this happens because the engine has injested water at some time and rust was left on the valve stem. This rust becomes a glowing ember when the engine is run hard and causes the stem to overheat and melt. It usually only happens to the S/C 4TEC. This can also becaused by not fogging the engine before putting the ski in storage. SeaDoo came out with a revised exhaust valve in 2007 and it's not supposed to do this. The original valve was sodium filled and the new valve is not. I called S.B.T. and asked them what exhaust valves they put in their reman engines and they said they used the updated valves and they weren't having any valve issues with their engines.
DAWG
They say this happens because the engine has injested water at some time and rust was left on the valve stem. This rust becomes a glowing ember when the engine is run hard and causes the stem to overheat and melt. It usually only happens to the S/C 4TEC. This can also becaused by not fogging the engine before putting the ski in storage. SeaDoo came out with a revised exhaust valve in 2007 and it's not supposed to do this. The original valve was sodium filled and the new valve is not. I called S.B.T. and asked them what exhaust valves they put in their reman engines and they said they used the updated valves and they weren't having any valve issues with their engines.
DAWG
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Lgreen
Member
My RXP #3 exhaust valves broken
Had same problem, were you able to save the Head? Was your #3 rod bent?did you fix it urself?
Had same problem, were you able to save the Head? Was your #3 rod bent?did you fix it urself?
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