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08-11-2020, 08:36 AM | #1 |
Senior Member
Join Date: May 2010
Posts: 447
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Valve seats with pits
I am restoring an old block that was stored in such a way that some of the seats are pitted.
Is it O.K. to grind the valves but quit before all of the pits have been removed? |
08-11-2020, 09:17 AM | #2 |
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Join Date: Aug 2016
Location: Alberta
Posts: 930
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Re: Valve seats with pits
I assume you mean "grind the valve seats". I think it depends on what you plan to do with it. If it requires new babbit and you want to make a good runner and drive it, I would grind the seats until the pits are gone and if they are too deep too do that, have it machined for new seats. If you are not going to the expense of new babbit and just want to build a running engine then you may be able to just clean up the seats as best you can and run it. It WILL run with pitted seats.
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08-11-2020, 10:22 AM | #3 |
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Join Date: Jul 2018
Location: Spring Grove, Illinois
Posts: 1,371
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Re: Valve seats with pits
I would get some seat cutters and clean the seats up - no need to grind them all the way down or install problematic new seats.
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08-11-2020, 10:34 AM | #4 |
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Location: Alberta
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Re: Valve seats with pits
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08-11-2020, 10:31 AM | #5 |
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Join Date: Jun 2010
Location: San Antonio, Texas
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Re: Valve seats with pits
It depends on how long you want it to last.
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08-11-2020, 11:05 AM | #6 | |
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Location: Eastern Tennessee
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Re: Valve seats with pits
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08-28-2020, 08:28 PM | #7 |
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Join Date: May 2010
Location: Hendersonville TN
Posts: 180
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Re: Valve seats with pits
To save the block it would make some sense to now go oversize with the intakes if they are the ones that are pitted. But without seeing your problem first hand a pitted seat may most likely your exhaust seats. Other than saving the project you really don't need larger exhaust valves, larger intakes can add horsepower if you have the other components to go with them.
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08-28-2020, 08:41 PM | #8 |
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Location: Saint Cloud Mn
Posts: 745
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Re: Valve seats with pits
Are you buying or selling.
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