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I Forge Iron

caboverde

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Everything posted by caboverde

  1. I found head bolts with washers, but bought a whole cylinder head, complete with valves, camshaft and gasket set. The old headline did raise questions, hence my decision. But the beginning of hardening with the burner on sand gives me the impression that there are many possibilities. When the engine is running again, I'll get to work on that. Cheers, Willem.
  2. No, that like bolts of Toyota. I have an 4.2 diesel truck and the same bolts for the head and it is steel. The friction is exactly very important, the head is alluminium and need washers. The second photo that's Nissan, and here all parts are for Toyota. That is the problem.
  3. Thank you, Epoxy, locktite... prevent bolts or nuts from vibrating loose. Good thing to use it there. The bolts are stretchable, so you have to tighten the bolt with a certain pre-tension. If you do it too loose, the gasket will leak with the known problems. If you tighten it too much, the bolt may break! I do it the old school way, tightening to a safe tightening torque. And then after 2500 km, check everything again. That is why it is important which bearing surface the bolt has, with a very low frictional resistance. It's trial and error, but I'm used to that as an aircraft mechanic who has even worked and flown on the lockheed Neptune. It's a Nissan Patrol RD28T, 6 cyl. diesel.1990.
  4. Quick answer, they are special rings that are not available here, original! 24 x 12.5 x 2mm. Google and even AliExpress don't have these rings! They must be hardened, otherwise the bolt will eat into the material and the tension on the bolt will be released. Incidentally, the coefficient of friction of the bolt and washer must be as low as possible. Everything you buy here is after market, nothing is original! In this case I think it is better to achieve the best possible result with self-made rings. Tightening once and tightening everything thoroughly after one time should be sufficient. All right, caboverde
  5. Red/orange, I think it's enough for my simple washers. But important, because the cylinderhead is alluminium and de torque value for the bolts are 120 N/m.
  6. About the washers! My question is that the color of the material when heated with the burner also indicates the temperature of the material at that moment, in this case it is steel. The color orange, what temperature does it convey? Blue/purple, I've also seen passing by. Best, caboverde
  7. Hi, it's a pity that someone sees me as a spammer, but it's all about hardening rings. I did that in this way, the aluminum barrel with sand and heated the ring with a burner. Red/orange and then in the water. File test, and the ring seems hard! Conclusion, the material can be hardened and actually the solution to my problem in this way. I'm going to build a box with sand anyway, it's childishly simple and a nice hobby to tackle some sturdier things. photo!
  8. Thank you, you give me a great idea. Sand, wood, construction material ....etc. I have plenty. I'm going to make something sand based. I'll let you know, and photo of course. Best, caboverde
  9. Interesting, this brings me to go to a smithy with this knowledge, and explain what the intention is. I just can't generate enough heat at the moment, but I will! Surface treatment seems to me to be the most appropriate for this application. I let you know, caboverde.
  10. Thanks for explanation, I understand what is meant. Only I have no provision at the moment to wake up a temperature of 700-800 degrees Celsius. Then I thought about surface hardening! I also cool my drill, which gets very hot, with water, so that it retains its hardness. Then I thought, heat a ring of steel, perhaps Fe42, in a pan with oil on the stove. And then cool down! Something has to be done of course, the oil will be 250/300 degrees. So the structure on the surface will change due to the cooling of the water. I don't know if my view is correct, perhaps surface hardening is a better option for washers under head bolts! All right, caboverde
  11. Hi, the first thing I did and tried was to heat up a pan with old frying fat, it started to smoke nicely. I made the ring super smooth and after a few minutes I shocked it in water, ssstttt... The material now has a slightly different color and even a file makes little impression, at least? Would this be a good method to make the surface harder, and maybe someone can explain to me what happened in physics? Best, caboverde.
  12. Thank you Steve, That is also my opinion, I am not sure of the type of steel, which is why I first go to the blacksmith for research. The mean problem is, here we don't have good steel. Just for that I will go to Portugal for buy good steel, messink, aluminium.
  13. Dank je wel! I already turned a piece on the lathe, it's an extension of a fat masonry drill, around 28 mm. It machined nicely, I'll take it to a blacksmith to see if it works out. After that I will certainly look into it further and buy or make an oven of course. Nice, on TV I see them making swords and beautiful knives. That's lesson 25 I think just like that. First a few rings. #Caboverde
  14. Hello, I am a new guest a Dutchman living in Cape Verde. I want to experiment with some steel rings to harden it. It is intended for cylinder head bolts in an aluminum head. I want to heat the material on charcoal, but then the questions? How long, how warm, what color....etc. And is it actually possible because the steel I don't think has very much carbon. Best, caboverde.
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