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Old 05-30-2013, 12:37 PM   #1
ImBillT
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Did ford leave the cylinders too rough?

So I'm working on my wife's focus that dropped a valve seat at 138,000. I can still see the crosshatch pattern faintly in the cylinder walls. The walls do seem to be glazed and there are signs of minor blow-by at the tops of the cylinders. Does this mean they left too rough a finish on the cylinders? The Toyota I took the head off of at 155,000 had no signs of blow-by and no visible crosshatch. Now as far as the blow-by, it could be that the ford got a little dirt in it, or went a little long on oil changes, but the fact that there is still a visible crosshatch pattern doesn't seem right to me at 138,000.


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Old 06-01-2013, 12:06 AM   #2
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140 looks and no answers? Nobody knows? How bout a guess. That was just NOT what I expected to see when I got the head off!!! Anybody else still see the crosshatch pattern when they pulled the head?
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Old 06-01-2013, 12:15 AM   #3
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it doesn't surprise me. I don't see anything wrong with that. it may have even been refinished at one time from the same issue.
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Old 06-01-2013, 01:49 PM   #4
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Originally Posted by mikebontoft View Post
it doesn't surprise me. I don't see anything wrong with that. it may have even been refinished at one time from the same issue.
I did consider the possibility of it having been redone once before.
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Old 06-02-2013, 05:25 AM   #5
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Having crosshatch left is generally considered to be a good thing, it is never bad. Means engine not wearing fast. I look specifically for it.

The crosshatch used on today's engines is far from rough. One reason why they last longer.
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