97 severe valve recession - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 15 (permalink) Old 06-16-2019, 04:50 AM Thread Starter
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97 severe valve recession

has anyone else run into this issue?

these intakes are so bad they have knife edges on them and nearly .140 recessed PAST where they are supposed to be

when we pulled the valves the bevel of the valves is gone and turned into a bowl with a VERY sharp edge on them.... every intake valve is like this, exhaust seem perfectly fine and even within spec

Truck has 74k miles on it, yes 74k NOT 474k as you might think with this kind of wear. Cylinders and pistons look perfectly fine.

WTF over.
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post #2 of 15 (permalink) Old 06-16-2019, 04:51 AM Thread Starter
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Re: 97 severe valve recession

idk why the pictures didn't attach on the previous post
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post #3 of 15 (permalink) Old 06-16-2019, 04:53 AM Thread Starter
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Re: 97 severe valve recession

apparently I cant edit my posts to put the pictures and posts together? idk... maybe cuz im new
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post #4 of 15 (permalink) Old 06-16-2019, 06:27 PM
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Re: 97 severe valve recession

That is odd.......
Are you sure it's never been apart before? As in maybe someone put the wrong intake valves in? Or ground the valves wrong?

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post #5 of 15 (permalink) Old 06-16-2019, 09:14 PM Thread Starter
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Re: 97 severe valve recession

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Originally Posted by Blue-Truck-Nut97 View Post
That is odd.......
Are you sure it's never been apart before? As in maybe someone put the wrong intake valves in? Or ground the valves wrong?

Sent from my E6810 using Tapatalk
no im not sure, there is grey Permatex silicon on the intakes and oil pan, but no gaskets or sealant on the exhaust manifolds, and the head gasket numbers are OEM gaskets, not Mahle, VR or felpro… that's what rather confusing about all of this...

valve guides are badly worn out as well, but that's to be expected with seat pressures only being about 45lbs closed with this degree of wear, the valves are going to oscillate without enough pressure thus wearing the guides

the intake valves are correct numbers, the seats are still usuable which is weird... I would have expected them to be trashed, they just need to be touched up and lapped in with the new ones


btw, does anyone have pictures of cylinder walls/pistons from a sever dustdown? im somewhat suspicious maybe that's behind this, but I don't seem to show any wear on walls or piston crown
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post #6 of 15 (permalink) Old 06-16-2019, 11:18 PM
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Re: 97 severe valve recession

Sorry no pics here, but can you see the crosshatch in the cylinder walls? The ones I've encountered that were dusted the walls had tracks up the sides as if they were polished with sand paper, and no visible crosshatch.

Is the turbo new? If not does it show signs of dirt?

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post #7 of 15 (permalink) Old 06-17-2019, 08:05 AM Thread Starter
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Re: 97 severe valve recession

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Originally Posted by Blue-Truck-Nut97 View Post
Sorry no pics here, but can you see the crosshatch in the cylinder walls? The ones I've encountered that were dusted the walls had tracks up the sides as if they were polished with sand paper, and no visible crosshatch.

Is the turbo new? If not does it show signs of dirt?

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sorry, working weird hours right now

i'll have pictures of the valves later today

the turbo has been dusted for sure, not horribly, but you can see it

the cylinder walls don't show tracks or cross hatch, so take what you will from that, cant really take pictures / work in the dark lol, neighbours seem to not like hearing mechanic noise at 3 in the morning lololol
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post #8 of 15 (permalink) Old 06-17-2019, 08:18 AM
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Re: 97 severe valve recession

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Originally Posted by narmalee View Post
sorry, working weird hours right now



i'll have pictures of the valves later today



the turbo has been dusted for sure, not horribly, but you can see it



the cylinder walls don't show tracks or cross hatch, so take what you will from that, cant really take pictures / work in the dark lol, neighbours seem to not like hearing mechanic noise at 3 in the morning lololol
Neighbors with no sense of humor eh? Lol

I'm starting to get on board with the theory that it's been sanded with that information. Any ideas about it's previous life?

And no worries, I think we all kinda keep odd hours.

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post #9 of 15 (permalink) Old 06-18-2019, 12:48 AM Thread Starter
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Go figure... net is down at the house... picked up the valves today and got some good pics... I'll let them speak for themselves

Uhhh auto resize on the phone apparently shrank them so bad you cant make out the details...
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post #10 of 15 (permalink) Old 06-18-2019, 02:01 AM
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Re: 97 severe valve recession

Yeah, that's pretty worn.

Time for a head shop.

Brother James

Ps...Im pretty frickin awesome!
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