viven44 Posted February 28 Author Share Posted February 28 Regular steel, especially in iron, won't ever weld itself in place. That's the chrome and nickel... What kind of bolts are used in newer Aluminum blocks? This is me documenting a lesson learnt on a timing belt job. I know they are torque to yield bolts. Hopefully not stainless steel.. likely Aluminum ? https://www.odyclub.com/threads/dont-skimp-on-bolt-change-during-timing-belt-job.366108/?post_id=2458605&nested_view=1&sortby=oldest#post-2458605 Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28 Share Posted February 28 What kind of bolts are used in newer Aluminum blocks? This is me documenting a lesson learnt on a timing belt job. I know they are torque to yield bolts. Hopefully not stainless steel.. likely Aluminum ? https://www.odyclub.com/threads/dont-skimp-on-bolt-change-during-timing-belt-job.366108/?post_id=2458605&nested_view=1&sortby=oldest#post-2458605 I'd imagine 10.9 Not that it's needed, when the aluminum (and even an insert) would pull long before the steel broke. Link to comment Share on other sites More sharing options...
viven44 Posted February 28 Author Share Posted February 28 I'd imagine 10.9 Not that it's needed, when the aluminum (and even an insert) would pull long before the steel broke. But in that picture you can see clearly that the bolt had begun to stretch and "yield". Surprised it was 10.9 (comparable to grade 8). Don't they alter the metallurgy of TTY (Torque to yield) bolts to yield at a specific torque ? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28 Share Posted February 28 But in that picture you can see clearly that the bolt had begun to stretch and "yield". Surprised it was 10.9 (comparable to grade 8). Don't they alter the metallurgy of TTY (Torque to yield) bolts to yield at a specific torque ? You keep saying that, but I don't believe it. Send it to Bill Vose for testing. NDT is as simple as sticking it in a STEM Link to comment Share on other sites More sharing options...
viven44 Posted February 28 Author Share Posted February 28 You keep saying that, but I don't believe it. Send it to Bill Vose for testing. NDT is as simple as sticking it in a STEM Good point. I'm sure Bill has already tested TTY fasteners... be interested to know if they are known to break with ~lets say 33ft lb torque upon repeated use. I don't have much experience with those fasteners except that one van that needed a timing belt. But I hear all new motors (LS, Godzilla) use these for the heads. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28 Share Posted February 28 Good point. I'm sure Bill has already tested TTY fasteners... be interested to know if they are known to break with ~lets say 33ft lb torque upon repeated use. I don't have much experience with those fasteners except that one van that needed a timing belt. But I hear all new motors (LS, Godzilla) use these for the heads. TTY will ALWAYS have a smoothly radiused wasp (or necked) section. Link to comment Share on other sites More sharing options...
viven44 Posted February 28 Author Share Posted February 28 You keep saying that, but I don't believe it. Send it to Bill Vose for testing. NDT is as simple as sticking it in a STEM Yes by looking at the grain structure in the affected vs. unaffected region, we should be able to tell !! So Bill has STEM capability ?? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28 Share Posted February 28 Yes by looking at the grain structure in the affected vs. unaffected region, we should be able to tell !! So Bill has STEM capability ?? He certainly did! I know people who have plenty of access. I know people who have them in their garage! But I don't know if I want to ask them to bother with a bolt from a truck. Link to comment Share on other sites More sharing options...
viven44 Posted February 28 Author Share Posted February 28 He certainly did! I know people who have plenty of access. I know people who have them in their garage! But I don't know if I want to ask them to bother with a bolt from a truck. I had an SEM in our lab (or I did until they figured out I was the only one using it and they wanted that space for storage !!) so they got rid of my SEM Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28 Share Posted February 28 I had an SEM in our lab (or I did until they figured out I was the only one using it and they wanted that space for storage !!) so they got rid of my SEM When my dad worked for AMF Atomics, making the me the rtgs for satellites they used to have to inspect the housings for hydrogen imbrittlement. Did you know that if you were irradiate a diamond, it will change colors from Yellow to Blue to Pink???? Link to comment Share on other sites More sharing options...
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