OM606.962 Valve Float @ raised boost?
OM606.962 Valve Float @ raised boost?
I've though of installing heavier exhaust valve springs but I have 2 concerns. Camshaft wear AND, if this can be done without pulling the head? I could also just limit my RPM to around 4400 and be done with it but I'd like to understand if in fact this is normal on a stock 606 with 2 bar boost?
I'm having a problem getting past 4500 RPM... which I thought should be no problem on a stock 606? When I get close to 4500 RPM- I don't get white smoke- I get black smoke even though fuel and boost are the same as at 4400 RPM. I also get this very strange noise which doesn't show up very well in my log data. The concern is that the exhaust valves are not sealing at the end of the exhaust stroke due to high exhaust pressure? Has anyone experienced this?
I've though of installing heavier exhaust valve springs but I have 2 concerns. Camshaft wear AND, if this can be done without pulling the head? I could also just limit my RPM to around 4400 and be done with it but I'd like to understand if in fact this is normal on a stock 606 with 2 bar boost?
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