Reaming in line a viper V-10 engine camshaft bearing surface.

If the block just needs an accurate in line boring job to fit bearings,it's NOT SCRAP YET. But,if something doesn't come out right,it could become scrap. I'd have the job done by someone with the experience and the right machine.
 
rafe said:
Interesting situation....it appears at this point it's either a new block or the bearings, if the block is scrap what does he have to lose? I have no idea what kind of a shop Syaminab has or his skill and experience. He seems to think he can do it, maybe he can? Sounds like his buddy has the Peso's to play with!
I hope he posts the process if he decides to try. I have met guys like Gene(the shop that did the bearings in the story) and there is no telling where they will pop up,there is another sentence....
"Necessity is the Mother of invention"

When I am writing to a forum I am just trying to learn, sharing my opinion on something, sharing knowledge,or experience, trust me I am not trying to be combative or a smart alec, so i hope this hasn't come across like that.....regards
Click to expand...
Thanks Rafe, want to see the machines in my "garage" search mexcoaero in youtube, there you can see my capabilities.
 
Thanks everyone. I grew up when cutting in line was done with the fords tool by hand cranking. Finish? Is just stopping the ream .0005 before, then changing to the lapping valve seat compound. How much is screwing up? Going up from .040 to .045? Well, I will then make the bushing to fit such diameter, or babbit it five thous more.
This time I celebrate the dare, whom by ignorance, or innocence thrust themselves into challenges that make them go steps beyond and after some time, end up miles ahead.
 
Please post the link to go directly to this, "mexcoaero". I am having trouble finding it. Thank you. Also, when you do this I would like to see the set-up to hod the block.

"Billy G"
 
There we go, now that we have built some trust...and thrust lets discuss how I plan to do it, then you can share the knowledge and together we can do it.
I plan to make a carriage for a long lathes bedways, sit and fix the block on it by the carters side, slide the boring bar through the block previously aligned, fix the boring bar between centers and with carriage dogs, slide the ring with the cutter near the first seat, turn on the lathe and cut .020" by pushing the carriage just the needed to cross through, once it went through, loosen the ring, return the carriage and slide the ring to the next position....how does that sounds?
here is where I expect the back headflaps and the "you dum" stuff, but only with the why and proposed solution.
We are doing these because we dont have shops near with profesional equipment to do it.
regards
 
I was not saying that you couldn't do it, and although you have a nice shop and all, there is more to engine machining than there is to most other types. I've done some engine machine work, and have hand built over 100 engines. My main concern on the overall project is the effect of moving the camshaft journals from their original centerlines. I haven't read that article yet, so perhaps it is addressed, but regardless, it is an issue that should be considered.

I would never recommend lapping aluminum. You'll never get the grit out. Due to it's soft nature, it will be embedded in the aluminum and be next to impossible to clean sufficiently. Sometimes surfaces like these are line-honed, but the better way to go, IMO, would be a burnishing tool. Better finish, harder surface for better wear, and excellent size control.

Naturally, using a lathe in that manner is possible, but measures must be taken to ensure very close alignment with the existing bore. As others have said, if the head is scrap now, you've little to lose, and much to gain if you can perfect this process. If I have a HBM, that would be my choice of "common" machines, not having the special automotive machines, but a lathe could work.
 
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I think projects like this are challenging and educational
no matter what happens there is a lot that can be learned
keep us posted
steve
 
As Tony said,I'd never lap aluminum. The aluminum will become a lap from this process. Then,you are really in trouble.

From the video,it is obvious that you are not in a home shop situation. Good luck to you.

I cannot understand a word you are saying in the first video due to the shop noise. When you are closer to the microphone it is much better. Thank you for the video.
 
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