This valve guide bore has what appears to be damage by a drill bit. What, if any, is the best method to repair? Thanks, MIke
That's not a valve seat, that's the valve guide bore. Probably gonna hafta bore it out further and push a sleeve in. Might be tricky. Anybody think some type of JB-like stuff could be used and then machined? Looks like the intake valve.
Thinking as a dirt-bag do-it-yourselfer...how could that be fixed if you were an Okie with a dead farm truck and 37 cents in your pocket??? Fit your new guide...I'm ***uming damage was from a badly executed removal of a stuck guide??, before doing seat start filing/grinding on guide til you achieve a decent semblance of a round hole partly in guide, partly in block. Run through a drill that you can almost shove in by hand. Increase drill size in smallest possible increments, irregularities will show and you can help drill with a bit of filing on those. Get hole round. Tap. Plug with a threaded piece, with a screw jack (made from nut and bolt) pushing guide and retainer up so it stays in right place during tapping and installing. If all fits, remove all and put back in with sealants. Do your valve job. Note that this is insane; a sane person would s**** the block, a mildly disturbed neurotic would take it to a machinest...I'd try it immediately. What the hell.
Silver Seal makes a tapered tap and plug kit just for fixing **** like this. They really work good. Follow Bruce's instructions and install the tapered plug,die grind smooth and you'll never know it's in there>>>>.
Being it's a intake JB Weld or Devcon will work just fine. Clean it well put in the JB and when hard [overnight at least] start shaping it . Does not have to be aero space as the rubber seal around the guide will conform to small flaws. If you want to be totaly sure a bit of silly seal on the rubber seal when you put it together .
It doesn't look like it goes right through. If not, I'd use JB or something like it and fill the groove, and sand or grind it til the guide fit again. Then use a rubber guide seal in that hole, indeed you should use them on all your intakes anyway. Some guys use them on all of the guides.
Be careful with JB Weld. I love the stuff and use it whenever I need something along those lines. I say that to make sure no one thinks I'm bad-mouuthing a great product..... I decided to to use it to plug up a power valve. I plugged one after carefully cleaning and prepping the valve. I then submerged it in a gl*** of gas and set on a shelf in front of my work bench so I could see it every day. It took about three months for the JB to swell up and start to come off. Kind of "softened" it. I could s**** it off with my finger nail. Might have taken a year or so to completely fail....don't know as I abandoned the project and just bought a couple of plugs... Even if took a year of more to fail in an engine..... the result is another tear down. Just my two cents. Regardless, good luck with your engine project.
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