I always love watching your videos even on simple basic things usually end up learning something.

Good info. I've wondered what the difference was between the two. Now I know.

while i agree that studs can be stronger than bolts i dont think it has anything to do with extra surface area due to threads on both ends. if you think about the bolt its basically the stud with the nut permanently affixed. they are both clamping the same way. the general consensus about studs is, since they do not need to turn when tightening, allow for more even and consistent clamping than bolts. Also the finer pitch on the head side of the stud increases clamping force for a given torque.

@paulgriffiths8359

7 жыл бұрын

Im no expert but I think the fine thread gives a more repeatable force as in the amount of force applied is a lot finer tolerance and is repeatable so this would also make the clamping force a lot more accurate

@mecheng1993

7 жыл бұрын

The head of a bolt is a stress concentration. Using a nut instead removes this weak link.

@paulgriffiths8359

7 жыл бұрын

not been a smart ass but how and why would this happen

@mecheng1993

7 жыл бұрын

The fillet going from the shaft to the head of the bolt is where the bolt will see the most stress because it's a sharp transition

@DoRC

7 жыл бұрын

John i suppose thats possible. i will say in my experience the vast majority of broken bolts ive dealt with did not shear right at the head.

Extra threads on the top of the stud does NOT add strength. All it does is help get repeatable camping force when using a torque wrench. You don't need to overcome the friction between the coarse thread and the block. The friction between the nut & (hopefully well lubed washer) is smaller and easier to account for. TTY is not about stopping bolts coming loose. It's a about stable clamping force across the many heat cycles that an engine faces. While I would recommend replacing TTY head bolts it's not as big a deal as everyone makes out. For instance sloppy mechanic has made 1000+ HP on reused TTY head bolts.

@wazza33racer

7 жыл бұрын

it also reduces the wear and tear on the threads in the block, especially threads in aluminium.

@tjsbbi

4 жыл бұрын

Yep, Rich is just not right on this. I thought it was a wind-up at first.

I like your videos, straight forward and unbiased. PS where's the cat??

I wait a whole day after last torque down. You need time for the gasket to compress. Those 9 times of tightening polishes the threads and nut for the studded engine, which make it more accurate of a torque reading

@Nostradamus_Order33

5 жыл бұрын

prancstaman good idea for multi-layer gaskets, I will have to remember.

dude I appreciate your videos n knowledge. I'm a new follower 💪

Since I've noticed you are working on an ls, any potential videos in the do's and do not's of building a 5.3 iron block? I got a full motor for free and I'm putting it in my 85 camaro. I want to do everything I can to it, correctly, before putting it in. Thanks for the endless knowledge and entertainment. Keep it up!

Being an ambitious do it yourselfer - i've wondered about some of this stuff. Of course you can google the info to your hearts content, but in the end, it is real world knowledge that will beat out reading hundreds of articles on the subject matter. Thanks for the video's. - M

@PatrickBaptist

7 жыл бұрын

Right. Just make sure when you are buying studs, don't go for china's cheapest, you get what you pay for and you might as well go for the OEM head bolts if that be the case.

Thanks for the lesson.

@PatrickBaptist

7 жыл бұрын

Dont buy cheap head studs, that's a bad lesson that will cost you money.

Reusing head bolts is completely dependent on application. Many Subaru engines can reuse head bolts, in fact, new bolts must be torqued to stretch the bolt and then loosened and torqued again.

I've got a 4cyl white diesel non turbo that came factory with head studs I was surprised.

Besides that there is big differences in build an repair time using studs vs bolts on again specific applications

You should do a video of you re torxing your headbolts when the engine is hot. Lol

Haven't heard about hot torquing, I know some guys will put the engine through a heat cycle and retorque after it cools down. On aluminum blocks you don't want to hot torque, some people say it can strip threads, probably not but no reason to do it anyway. Also to reason studs CAN be stronger is because they are often made with harder metal. Also since you are spinning a nut with fine threads instead of spinning on the coarse block threads, you get more accurate torquing and less likely to strip the block with higher torque settings

22, 90 and 90 might depend on the engine. I recently finished doing a cam swap on a 5.3 LS with alloy heads and block and it was 22, 90 and 77 degrees. That and the small bolts along the valley get torqued last. I wish I'd known then that using studs would get it back to using a conventional torque wrench, that torque to yield stuff is for the birds.

I am still afraid of becoming a mechanic, I feel like I wouldn't be any good. I wish I could be like this guy. Calm and cool.

@megastick9324

3 жыл бұрын

In the end, it’s all just nuts and bolts. If you follow the manuals/ instructions, don’t take short cuts, you’ll be fine. It’s really not that complicated, but some people just hate mechanical work. You have to some what enjoy it to be good. And again, read the manuals, read till you understand and THEN begin the task. I VW been building motorcycles for MANY years. It’s satisfying, but there are some tasks that do suck every time. Still, doing them per instructions means only doing it the one time, not having to go back and redo something because it sucks and you took a short cut. The second best piece of advise is two parts: buy or rent the proper tool, it’s critical, places like autozone will rent the tool and give you back your money when you bring it back, so it’s actually free. and , if something is eating you’re lunch, STOP, walk away and come back later. Frustration leads to broken stuff. Never rush, never try to get something done in limited time, wait til you have all the time you need. Little things always pop up and set you back. Last advice: take lots of pics and , bag and tag EVERYTHING. The memory is not that good, when it’s time to reassemble, a pic and a bag of the proper tagged parts makes reassembly soooo much easier. “ left valve cover bolts? Right here, right head bolts? Right here. The approach is far more important than just slinging wrench’s.

I think the most important thing in torquing down a head or anything with a fine tolerance is the how accurate the tension wrench Spending good money on a high quality tension wrench will achieve a lot more than some flash bolts and a elcheap'o tension wrench and flash studs

What do you think about using head bolts from the 70s. There not torque to yield. Got a lot of them.

Having both built and sealed control category engines what happens after regular disassemble then assembly is that those corse threads strip out of the block. And that brittle cast iron distorts under bolt heads. Bolts or studs use washers and moly lube The entire torque to yield is maybe ok for one rebuild. After that everything is bent and buckled. While not condoning it I have reused [weekend need to get job finished] those bolts with no problems. BUT the things are known to physically break doing so. Especially for people who yank tools instead of 'feeling' them up. The fine thread nuts give better clamping for the same torque. ARP seem to be reccomending higher,, and lower torque depending on the engine.

Why do the earlier Ls have different bolts ? is it because of the head or the block???🤔

Terrific.

Do head bolts stretch when using exhaust brake?

As always great video! I am putting new heads on a 6.5 TD...some people have recommended ARP studs...but all I hear from local mechanics is how every time they use ARP threads--they leak...apparently thru threads...any thoughts on this? I would surely hate to put studs on and have to redo all the work...

@X5XST4RK1L3R

3 жыл бұрын

That sounds fucking dumb. ARP studs are beasts, doubt the studs cause that problem probably some sort of seal

Hey anybody knows what parts a can reuse on my 02 dodge 2500 24v 5.9 commins? I have a cracked #1 piston but rings are good. And I have two cracked valves on cylinder #1 as well. I was planning on get a complete engine rebuild kit. But sometimes I else came out. So now I am very thigh on money. Thanks in advance and where or what brand can I buy to get my truck back together

When you say torgue with hot engine, do you mean running the engine on a stand, then remove valve cover and retorque or by manually heating the engine?

@ldnwholesale8552

3 жыл бұрын

As has happened for a 100 years assemble, run engine to operating temp then retorque. But can require a LOT of disassembley to get at them. The reason for monotourqe gaskets. In reality it is still the best way though I have never seen obvious failures except on race engines.

The division you used was kind of crazy. Is there a certain way to divide or was that just an error? By the way I love the channel and am considering becoming a diesel mechanic someday (I'm 13 years old)

@quaidq4771

5 ай бұрын

Well did you become a diesel mechanic ol son?

I'm tossing around the idea of putting a 1997 5.9 cummins engine in my 1975 ford f250. im kinda going in blind and was wondering if you would know what I might be facing? let me know if you could talk

@PatrickBaptist

7 жыл бұрын

Hehehe Fummins are awesome hahaha.

Some of the head studs,drilling out the bolt hole out and tapping out them to a bigger size has to be done.Northstar Performance has them for the Cadillac Northstar engines using a special jig drilling out and tapping the head bolt holes.This is their fix to the headgasket problems in these engines and has a patent on them.

@PatrickBaptist

7 жыл бұрын

Exactly why a northstar engine is best thrown in the trash when it's 100k miles is over, they aren't made to last and sure ain't made for the owners to fix.

There must be a thousand ways to torque a head. The reason to gradually increase the torque is so you don't warp the head by having one spot at full tension and another at none, by doing it in stages you put less stress on the head. Head bolts are designed with a fail point near the middle so that it doesn't break off in the weakest part which is normally the threads. A stud is better for accurate torque because you are not twisting the whole thing just the nut on top, because of not being twisted less stress is placed on the stud and the threads in the block for the same amount of torque making them stronger and less likely to pull or strip the threads. A quality stud Should still have a deliberate fail point same as a head bolt. You should retorque the head after about twenty hours of running the motor depending on the specs

@PatrickBaptist

7 жыл бұрын

He didn't even use a "quality" head stud, cheap china he said, really I wouldn't see how that is going to be better, I haven't known cheap china to make things in spec so well, same reason I don't buy cheap china piston rings or bearings..... You get what you pay for, rather than cheap no name studs, I'd rather go with OEM head bolts.

I'm not saying it changes your method or anything, but your explanation was incorrect. Adding thread on the bottom AND the top isn't what changes the clamping force, like you said the thread on the bottom isn't spinning it just sits there. Might as well be welded to the block for all the stud cares. When you torque the nut on a stud it pulls on the threads in the block just the same as a bolt since "every action has an equal and opposite reaction". Additionally the whole bolt/stud deforms not just the threads, so it doesn't matter that more length of rod is threaded. If there is more clamping force from a studs then it's most likely because on the studs you showed the top threads are a finer thread then the bottom. Finer thread means more clamping force for the same torque on the bolt since there's more revolutions of the nut per length of rod travelled (torque multiplier). That's why studs are useful is the finer thread since you can't get a finer threaded bolt and have it still thread into the block, but you can change the pitch of the thread on the top of a stud. It isn't it being threaded both sides that matters, it's the pitch of the thread, and a stud allows you to use a finer thread meaning more clamping force. Great videos and the mistake doesn't make it any less useful, just wanted to point out the explanation had some physics misunderstandings.

What school did you for mechanic cuz they did a great job my friend

@jhowe67

6 жыл бұрын

I believe he went to the School of Hard Knocks.

What kind of torque wrench do you use? Do you think harbor freight torque wenches are good?

@TheJared1445

6 жыл бұрын

Kelly t I have one I've only used it a few times And haven't had a problem with it. For $20 it's not bad for a DIY'er. If it not being used constantly in a professional setting it will be fine. But there are better ones out there. Just don't drop it because $20 to recalibrate it is a new torque wrench.

@TheJared1445

6 жыл бұрын

Anthony Fuoco also nicer ratchets have more teeth in them so when you're in a tight spot you can actually tighten. Now tell me your craftsman can do that. But actually Costco has a pretty nice DeWalt set for around $80. It's a pretty nice set for the price, I got mine as a gift from my parents for Christmas and I love it because it's small enough I can keep it in my car and bring it with me everywhere.

do you think studs will work on the 80's 5.7 diesel?? I know I know there a bad mtr out of the box my grandfather in law has 83 Buick Rivera love the car it's original owner 98k on it it's going to stay in the family and yes its showing typical heating and pressure signs of head/gasket problems!! a response and suggestions would be appreciated love the channel by the way

@fsnissen

7 жыл бұрын

Yes, studs are the way to go on the Olds 5.7 diesel. Stay with ARP, not the chinese crap.

@PatrickBaptist

7 жыл бұрын

EXACTLY what you said, if you want to go cheap on the studs, then go get OEM head bolts, you will be better off, china's cheapest are never known for being within spec. Then again a 5.7 is something I wouldn't waste the effort to rebuild. Whats funny is the 7.3 & 6.0 powerstroke uses the same rollers the 5.7 diesel does LOL.

I want head studs that wont crack in the block. What are the best ones. I dont care the price they need to be solid

Damn good video, appreciate it! Something I just saw recently that I've never seen before is a guy on KZread just took his head bolts out of his 5.9L 24V and immediately replaced them one by one with studs without removing the head from the block or even removing the engine from the truck. This might be common practice but I've never seen it. Good idea or no?

@wyattlewis8671

7 жыл бұрын

Evobrubaker it's a fairly common practice, you remove them one at a time and torque the studs to match the head bolt's torque spec, then once you have them all swapped, you go over and torque them down the same way you would if you had the head pulled.

@evolati12

7 жыл бұрын

Wyatt Lewis appreciate it!

That was a quite irresponsible little bit on why studs are better, not only was it wrong it was dangerous. 0:48 Doubling the PSI cause two sets of thread, wow, how do you get so wrong and not be called on it? Studs are better for three reasons. 1. Generally larger diameter shafts and of better quality material. 2. When torquing your not twisting the shaft. 3. And the BIG one, the torquing is done on the quality steel fine thread. NOT in the cast iron course thread. Fine thread has more clamping force for a given torque and the steel being of higher quality doesn't gall.

@ZacharyTarbell

4 жыл бұрын

Blahh

@crezychameau

4 жыл бұрын

Thanks ! I was annoyed at this and you explained it way better than I could. I love Rich and his videos, but way too often he states things that are completely wrong as if they were facts just because he thinks it's how it is.

@DriveCarToBar

4 жыл бұрын

The coarser thread also tends to be larger in most studs which provides more surface area in the block. You get the higher torque on the finer thread and a mechanically larger connection in the block. That's why the fix for Northstar head gaskets is a stud kit that comes with a guide and drills the holes in the block larger to allow greater surface area for the coarse threads to bite.

@DriveCarToBar

4 жыл бұрын

And the greater diameter of the stud is better. Same reason nails are stronger than screws in wood and pins are used to hold heavy weights and high shear loads instead of bolts.

@FlowParkour15

3 жыл бұрын

Well he did mention it was a theory in the beginning of the video. Although you both have views thay disagree, he didnt state anything about his theory being fact

What brand of studs? Pro comp?

@PatrickBaptist

7 жыл бұрын

He said they were just from china, so probably the cheapest one could find.....

I like the studs cuz it's generally easier to get the head on when your a half crippled one man operation.

Where do I get China studs

@frontxxrunner

5 жыл бұрын

Chinese Tinder. Sorry. I'll see myself out.

I just wacth arp say there studs sterch so whats the point real

Are cummins head bolts torque to yield?

@PatrickBaptist

7 жыл бұрын

Neah you just use epoxy on the heads to hold em down hehehe.

@alycestapleton

6 жыл бұрын

CrocManAU clueless

@mustafaYkhan

6 жыл бұрын

Patrick Baptist Why not use zip ties..?

I used the cheap China stud and had a head gasket leak

The bolts have a strength of the miner diameter. The studs have the same miner same strength. only torsion of the bolt.

Factory Ls bolts are actually torque plus angle, not torque to yield.

@allenklingsporn6993

6 жыл бұрын

Ryan Barbolt Quality Engineer, here. Torque plus angle is how you perform a repeatable installation that gives you a bolt that has been torqued to yield. TTY is ALWAYS the end result of a modern torque plus angle installation process. The angle is added because your torque is a false positive for bolt stretch due to additional friction of bolt vs. block/head. The angle makes up for that low stretch situation.

Good video and technical stuff but Chinese head studs? Why. I’ve learned a long time ago you get what you pay for and there is no money to be made in rework. Keep up the good work.

@JoeHynes284

6 жыл бұрын

He and many people who follow him have done countless builds with China studs and zero issues. So they keep using them.

@DriveCarToBar

4 жыл бұрын

It's about overbuilding. A Chinese head stud that has coarser threads in the block with a larger diameter, will provide greater holding power than an oem head bolt. Even if the Chinese studs are of lesser quality, you can still get better clamping force with bigger hardware.

Ive seen people spend thousands to get 6.0 fords studed a blown headgaskets within months

tork while its hot. ..haha cool

Not sure what YT recommendations is doing to me but just watched driveway engineer say basically the opposite of this video...ok to reuse head bolts in LS...check out the test to failure in his vid. Help...

@DriveCarToBar

4 жыл бұрын

If bolts are torque to yield, replace the bolts. If you're not sure, replace the bolts. If you're not going to stud the block, new bolts are cheap insurance.

75 divided by 3 is 20😂😂😂 wut 4:20

@PatrickBaptist

7 жыл бұрын

LOL

@noHandle1776

6 жыл бұрын

Experienced rounding, no fault. But you get the idea :)

@pennywisetheclown9090

5 жыл бұрын

My torque wrench is not accurate enough to do 25ftlbs, 20 makes sence, then 50 the 75, 3 step process

This was clearly before you talked to matt at sloppy

You know your shit 🤣🤣

@PatrickBaptist

7 жыл бұрын

And don't buy the cheap head studs if your going to bother with that route... Kills me, cheap china head studs...... AH but hey china is so well known for making such fine products within spec right?

Watch Sloppy and learn something about the LS and reuse.

@DEBOSSGARAGE

7 жыл бұрын

Ask Matt if he would build it for a customer using used parts, put his name on it and post it on the internet. Studs, Bolts, and gaskets are cheap

@jonsaircond8520

7 жыл бұрын

DEBOSS GARAGE exactly it's a totally different mentality when you charge a customer for work you must stand behind compared to a buddy's ride your helping out for a 12 pack

@PatrickBaptist

7 жыл бұрын

Good studs aren't cheap. But then again this is just a gasser and not a diesel.

Dude if you are going to by cheap studs from china then there isn't going to be much difference than regular head bolts.... ARPs are expensive for a reason and I sure wouldn't bother with anyone elses studs, but ah it's goin in a chevy so it shouldn't matter that much.... But really I wouldn't go with china's cheapest on a rebuild at all, they sure don't have a rep for making things within spec.

Doubling um ok 🤪🤪🤪

95 percent marketing bullsht quicker to use when changing gaskets would be cheaper to make compared to a bolt could custom made to fit the headbolt space without the need to retool - im quessing

If they are OEM head bolts you don't need to replace them because torque to yield does not mean that they are no reusable. Sloppy mechanic and junk yard engineer has tested this. If they are Chinese or any 3rd party bolts then you do have to replace them because they have lower tolerance that OEM. GM/Chevy has really good bolts👌

75 % 3 = 20? yikes

This shit is greek to me

sry boss, 75 divided by three is not 20...it's 25 : /

Unless you have an aluminum block (or those 6.0 6.4 diesels),you don’t need head studs. If you take off the head, get a 📦 label with matching holes take the bolts out one by one, put them all back in there respective holes. Done. You don’t have to be some hero. Smh