SteveH Posted September 9, 2011 Posted September 9, 2011 You are forgetting that the crank is the bit that provides the power to a cambelt, it supplies the drive and so it will overcome compression itself and does not have to rely on the strength of the belt for this. Quote
hilux Posted September 9, 2011 Posted September 9, 2011 See my earlyer reply, I was only trying to make the point that the cam resistance is huge for such a slight belt over mant billions of revolutions demonstrated by trying to turn over an engine on the crank - made easier (a bit) with the plugs out but still hard to do on the compression strokes - which is each revolution on a `four` Quote
SteveH Posted September 9, 2011 Posted September 9, 2011 i'd say that turning an engine by hand is massively easier with the plugs out but I see your point and yes it is pretty impressive how long they last. Quote
V8grunt Posted September 10, 2011 Posted September 10, 2011 The Camshaft is only going to "open" the valve after the compression stroke, not whilst under compression, If it opened the valve under compression the piston would carry on up thru the head! Quote
pistonbroke Posted September 15, 2011 Author Posted September 15, 2011 Forgot to add damage report . 8 valves bent , guides look OK , Pistons etc. OK Quote
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