Line of attack with a failed timing belt...
Discussion
Mr2Mike said:
Bent is bent. Valve heads rarely break off from a broken timing belt.
Well yes, obviously bent is bent. However having stripped a few heads down that have broken belts I have seen several break the heads of the valves and smash them back through the head and the piston crowns.
Never seen this scenario with the engine at idle, yes valves bend but it's a lot easier to fix than when the belt goes at 6k rpm - that looks like a grenade has gone off inside the cylinder.
My point being that rpm does influence the severity of damage done (in my experience)
E-bmw said:
DuraAce said:
therefore will impact the valves many times less than the other.
Once is enough to wreck the lot!8/16 valves is a lot easier and cheaper to replace than valves, guides, head, pistons etc.
Faster rpm at breakage = more damage done (generally speaking, exclusions may apply) was my original point. You've more chance of resurrecting an engine that breaks it's belt at low rpm vs high rpm.
Edited by DuraAce on Saturday 6th August 13:44
DuraAce said:
Mr2Mike said:
Bent is bent. Valve heads rarely break off from a broken timing belt.
Well yes, obviously bent is bent. My point being that rpm does influence the severity of damage done (in my experience)
E-bmw said:
DuraAce said:
8/16 valves is a lot easier and cheaper to replace than valves, guides, head, pistons etc.
Faster rpm at breakage = more damage done (generally speaking, exclusions may apply) was my original point. You've more chance of resurrecting an engine that breaks it's belt at low rpm vs high rpm.
Edited by DuraAce on Saturday 6th August 13:44
Not once does the same as many times.
Not once WILL cost as much to repair.
Not even once won't break the valves.
"once is enough to wreck the lot"
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