SA200 Valve Seat Replacement

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Hi, I have a couple of valve seats that need replacing one that is completely annihilated on the F-163 block. The exhaust valve on #4 is the worst, look at the pic where I shined a light through the port and you can see a gap so large a house cat can go through it. There's no way that thing is going to get any compression. A much smaller gap on the intake side too. The valves look pretty good on the sealing edges. This does not look like something I or a machine shop can just grind out. It looks as though some wear and corrosion may have gotten into the block and the block could be destroyed too. I'm reading in the manual that a special puller is needed for the job. Also I need dry ice to install the new ones.1) Has anyone done this themselves before? 2) What's your methods?3) What kind of tools did you use? 4) Is it best to just let a machine shop do it and what would it cost as compared to me doing it myself (That is if I even can)? But I try to do everything myself if at all possible and cost effective.Thank you,Mr. Yates




Reply:It looks bad .You can lap it with old valve. If take to automotive machine shop they will do it right but will be costly. Dave

Originally Posted by DD-YATES

Hi, I have a couple of valve seats that need replacing one that is completely annihilated on the F-163 block. The exhaust valve on #4 is the worst, look at the pic where I shined a light through the port and you can see a gap so large a house cat can go through it. There's no way that thing is going to get any compression. A much smaller gap on the intake side too. The valves look pretty good on the sealing edges. This does not look like something I or a machine shop can just grind out. It looks as though some wear and corrosion may have gotten into the block and the block could be destroyed too. I'm reading in the manual that a special puller is needed for the job. Also I need dry ice to install the new ones.1) Has anyone done this themselves before? 2) What's your methods?3) What kind of tools did you use? 4) Is it best to just let a machine shop do it and what would it cost as compared to me doing it myself (That is if I even can)? But I try to do everything myself if at all possible and cost effective.Thank you,Mr. Yates




Reply:A decent auto machine shop can fix this right up with new seats. The tooling prevents this from being a diy job and a couple holes is not that expensive.

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Last edited by Sberry; 14 Hours Ago at 01:26 PM.www.urkafarms.com
Reply:They make reamers for rebuilders. It takes about a hour per valve seat for new inserts. Dave

Originally Posted by Sberry

A decent auto machine shop can fix this right up with new seats. The tooling prevents this from being a diy job and a couple holes is not that expensive.
Reply:

Originally Posted by smithdoor

It looks bad .You can lap it with old valve. If take to automotive machine shop they will do it right but will be costly. Dave
Reply:I just a lot of course grinding compound and use the old value so new value stay in good shape.Have you lap values?.https://m.youtube.com/watch?v=5a71QWTogmEDave

Originally Posted by DD-YATES

Please explain how I can lap that with an old valve. I've never done it. Another old valve or the one I have? Does that mean I will not need a new seat?
Reply:The F-162/163 blocks don't have intake seats only replaceable exhaust so a machine shop would have to be enlisted to machine the block to accept intake seats and replace the exhaust.Another option would be to have someone such as member castweld build up the intake seat area with cast powder spray weld and machine the area back to spec.Last edited by duaneb55; 13 Hours Ago at 02:41 PM.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110

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Originally Posted by duaneb55

The F-162/163 blocks don't have intake seats only replaceable exhaust so a machine shop would have to be enlisted to machine the block to accept intake seats and replace the exhaust.Another option would be to have someone such as member castweld build up the intake seat area with cast powder spray weld and machine the area back to spec.
Reply:

Originally Posted by smithdoor

I just a lot of course grinding compound and use the old value so new value stay in good shape.Have you lap values?.Dave
Reply:

Originally Posted by DD-YATES

In your opinion, do you think this is worth fixing rather than finding another block? All of the seats are good except that #4 exhaust. Couldn't the #4 intake just be ground?
Reply:Member castweld would make short work of that so perhaps a few phone calls to some local machine shops might answer your questions.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110

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Reply:This seat wont lap and it wont grind,  Needs to be fixed. I did forget though we working on in block  unit, spose that makes it a bit different.www.urkafarms.com
Reply:

Originally Posted by duaneb55

That pitting looks pretty deep.  Grinding the seat area back to acceptable would likely result in excessively sinking the valve into the block.Is the #4 intake valve bent? If so, that could be making it look worse than it really is.  Usually hard to tell from photos.
Reply:

Originally Posted by DD-YATES

You did mean #4 exhaust valve, right?
Reply:Here's just one example of what castweld is capable of doing and very similar to what your situation is.https://weldingweb.com/vbb/threads/1...irs?highlight=MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110

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Originally Posted by duaneb55

Here's just one example of what castweld is capable of doing and very similar to what your situation is.https://weldingweb.com/vbb/threads/1...irs?highlight=
Reply:I'll PM you his name and #sMM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110

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Reply:I agree 👍 I think would come down to how mush money he has to do job.I have made new seats in cast iron block. For my it was easy. I did make mind own seats and machined to fit the new bored hole.Dave

Originally Posted by Sberry

This seat wont lap and it wont grind,  Needs to be fixed. I did forget though we working on in block  unit, spose that makes it a bit different.