Blew my headgasket 2day

[lsdeater]

Hey wicked can i reuse the tty bolts again I blew my motor and Nick said i can reuse them once. Opinions.

i wouldnt take any chances. reusing TTY bolts is NOT A GOOD idea.

 

[CWiLL]

thats another reason y i dont use TTY bolts. u cant reuse them. lets look at whos car is going fast and what they use. i bet most use arp head studs not Bolts

 

[tervo]

new member need help with a problem my cams are tiking at 2000rpm driving or idleling ands its loud i could hear it inside the car with my windows closed! its a 1999 mazda protege 140,000 miles on it its an lx 1.6liter engine. do i need new cams?

 

[Captain KRM P5]

thats another reason y i dont use TTY bolts. u cant reuse them. lets look at whos car is going fast and what they use. i bet most use arp head studs not Bolts

brian mp5t and kooldino and a few others use TTY. brian in particular had a nasty situation with ARP if i am not mistaken. i am of the old school mindset that engine hardware when broken in should never be re-used anyways

 

[CWiLL]

what happened to bryan?

 

[BlkZoomZoom]

azian6er got his head screwed up by them also.

 

[CWiLL]

why? how?

 

[BlkZoomZoom]

? He made a thread about it awhile back. Can't remember what the cause was.

 

[Blake]

Mazda Speeder, its not a good idea to reuse old, broken-in hardware. Like my pops use to say, "dont half ass it son".


On another note, People who have used the arp studs, what tq specs did you use, Im getting ready for a motor rebuild.

 

[Mental Addiction]

Hey wicked can i reuse the tty bolts again I blew my motor and Nick said i can reuse them once. Opinions.

Abosolutly not. All fasteners are nothing more than just stiff springs. As they are tightened (no matter what method is used to tighten them), they stretch and because they want to go back to their original length, they provide a "clamping load" which keeps everything together. The farther you stretch the fastener, the more clamp load you get but, you can go too far. When this happens, the fastener will not go back to its original length. This is called "yielding" the fastener and while you may not see it, it will be slightly necked down at some point and will no longer be as strong. This is a FACT!! The same thing happens but sort of in reverse when a valve spring gets old, it measures shorter then when new and will not produce the same spring pressure. The only time I have seen "torque to yield" used is in OEM factory bolts. There are several reasons this method is used but one is, they use the fastener to the maximum clamp load it will produce so they can use a smaller bolt or stud. Imagine if the factory can save 1 or 2 cents on every bolt and stud. This will add up to millions of dollars per year in savings. In the racing industry, most fasteners are tightened to about 75% of full capacity and they can be used over and over. Torque to yield fasteners are a "use them once and throw them away" deal. Do not EVER reuse torque to yield fasteners more than once. They simply will not do the same job twice and could actually fail at any time.

 

[BlkZoomZoom]

Mazda allows re-using the bolts.

 

[mazdaspeed75]

So is it worth to reuse them one time.

 

[Mental Addiction]

Mazda allows re-using the bolts.

And that means what?

 

[Mental Addiction]

So is it worth to reuse them one time.

NO

 

[BlkZoomZoom]

And that means what?

Exactly that, if the bolts meet the length requirement then you re-use them. If they are stretched too long, then you replace them.

 

[Mental Addiction]

I hate doing this because I know who and what is going to be said. However I feel I need to let people know my experience and opinion. In most cases, the ARP fasteners are higher tensile strength. In the real world, the only thing higher tensile strength does is allow the fastener to be stretched farther before it yields. As an example, if you had two bolts that are made dimensionally the same, and one is hardened to 30Rc (30 Rockwell on the "C" scale) and one is hardened to 45Rc, and you install and stretch both to the same value, the clamp load will be the same. The difference is, the harder one can be stretched more without yielding so yes, you can get more clamp load. With that inmind the stock head bolts and rod bolts are engineered with a designated clamp load. As you raise the RPM's, cylinder pressure or whatever it is you are doing, the clamp loads need to be higher to hold the power.

 

[BlkZoomZoom]

Everybody has a opinion on this, they all differ greatly. I believe we have gone rounds and rounds before. It always ends the same, (In that everybody has there opinions).

If you are getting a Mam block, you will get Arp. Mpnick likes the tty bolts. etc. etc. etc.

To save everybodies sanity at this point lets just say you should leave it up to the person building your motor.

Agree?

 

[Mental Addiction]

Everybody has a opinion on this, they all differ greatly. I believe we have gone rounds and rounds before. It always ends the same, (In that everybody has there opinions).

If you are getting a Mam block, you will get Arp. Mpnick likes the tty bolts. etc. etc. etc.

To save everybodies sanity at this point lets just say you should leave it up to the person building your motor.

Agree?

Everyone has their opinon. I agree. I'm a firm believer on using the ARP over the TTY bolts. So I gave my opinion and explaination why I feel this way..

 

[BlkZoomZoom]

Nothing wrong with that.

 

[laracroft]

I hate doing this because I know who and what is going to be said. However I feel I need to let people know my experience and opinion. In most cases, the ARP fasteners are higher tensile strength. In the real world, the only thing higher tensile strength does is allow the fastener to be stretched farther before it yields. As an example, if you had two bolts that are made dimensionally the same, and one is hardened to 30Rc (30 Rockwell on the "C" scale) and one is hardened to 45Rc, and you install and stretch both to the same value, the clamp load will be the same. The difference is, the harder one can be stretched more without yielding so yes, you can get more clamp load. With that inmind the stock head bolts and rod bolts are engineered with a designated clamp load. As you raise the RPM's, cylinder pressure or whatever it is you are doing, the clamp loads need to be higher to hold the power.

You make my brain hurt....I sure wish I knew what you were saying cause it sounds brilliant. lol
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