Right on, glad you got my point. AG

Is it nit nopar 1/2 inch and chevy 7/16?

Thanks' very much Dean> AG

Thanks Todd, we are all still learning. AG

Thanks Patrick, AG

That will stick with me forever!

Thank you Christopher, glad you enjoyed it. AG

Nice!, thanks Dave. AG

Thanks for the nice compliment Joel. I will pass it on to Mike, we had a fun trip together. AG

Thanks for watching Hugh.AG

Very nice compliment, thank you David. AG

Good point, thanks for the comment.AG

Thanks Less, I will take that as a compliment.AG

Hello and welcome the Netherlands. AG

Thanks Truth, never heard that one before. AG

Thanks Scotty, unless they have been torqued to the yield point, all bolts can be reused. AG

Thanks JM. AG

Thanks Robert. AG

Thanks Clark. I am in London Ontario. AG

Thanks for the info Jm. We are all learning. AG

@@goldsgarage8236 going back and watching your shows, all GOOD

Thanks for doing that, AG

I should have added that the rod drill holes are no longer parallel, bending the bolts

Thanks for the question David. An ASTM or SAE certified 4340 is a high carbon steel with specified amounts of chrome and molybdenum, as well as other alloys. In industry for critical applications, small samples would be analyzed in a lab to verify the content, tensile strength and Rockwell or Brinell hardness. All of these qualities can be substantially improved by heat treating, so typically in the design phase, tensile strength and hardness would be specified. I can't speak for what happens overseas or anywhere else, but unless you have the ability to test, you don't really know. Hope this helps. AG

Correct Ray, torque to yield and torque to turn are two separate concepts. Thanks for the question. AG

Thanks you U. AG

I wish I did, but no. AG

Thanks for the info Don.AG

Thanks for commenting Bill.AG

Good observation. The difference it there is no practical way to measure stretch in main bearing or head bolts. You are correct, use the torque specifications and you will be fine.AG

Correct, thanks Eli.AG

Thanks for the comment Scott. That is why the engine is more likely to fail when you lift off the throttle. AG

@goldsgarage8236 or during cruise with strong exhaust and some axle gear . My car cruised 80 mph at 3800 rpm. Pontiac 455. It might have had an oiling problem, such as rods side clearance too tight. Cruising long distance was a repetitive death sentence.

Yes you can, as long as you don't over torque them. AG

Yes they are. Thanks, AG

Thanks for your comment Patrick.AG

Please share.

@jkdwayne i see useful information in the original post; I see no useful information in your comment

Your comment is incorrect

I concur. If I was paying tuition for this class, I would want my money back. The presenter rambled all over the place with irrelevant information and war stories, redundant content and never made a cogent story nor explanation for how the fastener really works. To do this, one must illustrate how the clamping load of the fastener creates compression in the parts that are fastened and then how the clamping load varies as the joint is loaded. The presenter also did not explain the real reason why a torque to yield fastener should not be reused. By his own diagram of load vs elongation, once the elastic limit (a term the presenter should have used, but failed to) is exceeded and the fastener permanently stretches, it will still come down on the same slope with same Young's Modulus (BN: the presenter never mentioned either "slope" nor "Young's Modulus"). If that fastener were to be reused, it will be longer than it was originally, but when it is tensioned again, it will go back up the same curve with the same slope it did originally before. But will it achieve the same clamping load at the same torque value and why? He did not even get close to explaining this. He never answered the question about why the fastener is not to be reused. The presenter would have done well to prepare and practice a cogent, succinct presentation with illustrations and demonstrations. A bunch of show and tell props did not add anything to the presentation. I am a MS-degreed, Mechanical Engineer with a PE license, who practiced nearly 40 years during which time I have designed and specified countless bolted joints that were sound and reliable.

@@jamesclaeys3192You should have watched the video. At 9:36 he mentions modulus of elasticity. You do realize this is the same thing as Young’s modulus, don’t you?