Bent valves upon start up.. suggestions for bottom end??
02-25-2011, 08:59 PM
#23
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Really that mark doesn't look too bad to me. What is the depth roughly of the mark, like does your finger nail kind of gets stuck in it or deeper than that?
Mine looked very similar and was fine. Hopefully those pushrods were a joke, hopefully. The reason I say that is the pushrods we used from TSP would have never broken under that minimal spin over. Hard to say but it might be just fine, doesn't look near as bad as I thought with a broken pushrod.
Any pics of the bottom side of the head?
Mine looked very similar and was fine. Hopefully those pushrods were a joke, hopefully. The reason I say that is the pushrods we used from TSP would have never broken under that minimal spin over. Hard to say but it might be just fine, doesn't look near as bad as I thought with a broken pushrod.
Any pics of the bottom side of the head?
02-25-2011, 09:24 PM
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The cylinders acquired a little bit of surface rust since its been sitting with no heads for a couple of months... suggestions on removal so i dont have to break it down?
02-25-2011, 10:54 PM
#29
Any rust on a cylinder wall is a not good...........But honestly that valve didn't hurt anything in the bottom end so just let the bottom end be. I wooooood be worried about the lifters, its possible some are damaged if it actually broke hardened pushrods. I woooood also inspect the rocker and bolt at the broken valve. Otherwise you're ok.
Last edited by O2Form; 02-25-2011 at 11:04 PM.
02-27-2011, 04:54 PM
#30
cross hatch visible doesnt mean squat...
when you run an engine to break it in and to get the rings to seat properly, you have to have fresh crosshatch..
an old motor may visibly show grooves of crosshatch, but they no longer have the roughness to properly break in and seat the rings...they are more like a polished stone, nice and round and smooth when you look at them up close
you will never get new rings to seat properly in an old engine unless you lay in new crosshatch in the cylinders
when you run an engine to break it in and to get the rings to seat properly, you have to have fresh crosshatch..
an old motor may visibly show grooves of crosshatch, but they no longer have the roughness to properly break in and seat the rings...they are more like a polished stone, nice and round and smooth when you look at them up close
you will never get new rings to seat properly in an old engine unless you lay in new crosshatch in the cylinders
02-27-2011, 11:14 PM
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It's a little late to say this but whenever I changed Heads/Cams I always put a socket on the crank balancer and turned the motor over by hand and checked for any type of interference.
