Whenever my motor blew my piston shot up and hit a valve popping of a rocker the valve doesn't look bent but it doesn't completely close like the rest of them and there's a spot on the head where it looks like it got bent a little. What should be my next step? Should I scrap the head or it's probably best to just put in a new valve and rocker?
Motor threw a rod and piston hit valve
black05gt
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Whenever my motor blew my piston shot up and hit a valve popping of a rocker the valve doesn't look bent but it doesn't completely close like the rest of them and there's a spot on the head where it looks like it got bent a little. What should be my next step? Should I scrap the head or it's probably best to just put in a new valve and rocker?
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21,895 Posts
I would take it to a machine shop and have them inspect it. There's a lot the 'ol calibrated eyeball can't accurately tell. If they give it a clean bill of health, go ahead and re-use it.
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3,214 Posts
It looks like the head got bent or the valve got bent? Either way machine shop is the way to go
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1,771 Posts
Was there any work done to your heads or were they stock? If they were stock I would say just buy a different head. If they were ported, try to get it fixed.
FYI ... I believe the MMR500 & 600 shortblocks use stock cranks with forged pistons and rods. The MMR750 and up uses forged cranks.
FYI ... I believe the MMR500 & 600 shortblocks use stock cranks with forged pistons and rods. The MMR750 and up uses forged cranks.
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1,136 Posts
So, you haven't seen a warped aluminum head before??????
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Warpage isn't caused by piston impact. The issue at hand is piston impact. Aluminum heads don't warp from piston impact, they crack. Warpage is caused by heat cycles. Next.
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5,085 Posts
Your question is incomplete. If the cam is installed in the head, no all valves won't be closed if all cam/valve components are in place. If cams or followers removed all valves should be closed. Take the heads to a reputable machine shop and have them checked. Checks are cheap. Let them know what's wrong, what happened. They'll check all associated issues and fix them. It's actually very affordable, certainly much more affordable than half assing it now and then doing it all over again in the near future.
mustang windsor PI heads - Google Search
They look like that so I guess they are Windsor heads? Which ones are better Windsor or Romeo
They look like that so I guess they are Windsor heads? Which ones are better Windsor or Romeo
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5,085 Posts
Okay, so they just don't have the cam cap girdles? That's one of the few differences between Windsor and Romeo. You'll need Windsor valve covers also. Other than that, they're interchangeable with Romeos.
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