Whats the difference with Arps ?

[fonz87]

Just wondering, whats the difference between Arps Head Bolts and head Studs.
Which is better and what do many of you guys use ??
Also do any of you guys have to do anything to the block or the head for these to fit ?? or is it a direct fit ?

 

[noah89t]

direct fit.
i use ARP bolts in my head but many use the studs. you should search the forums and read why people choose the ones they do.

 

[JesseH]

also, you can put the bolts in with the head on....with the studs it has to come off....but, many people like the studs better (seach around to find out why) and the studs can normally be torqued down a bit more.

 

[Jaguar_5]

also, you can put the bolts in with the head on....with the studs it has to come off....

That is not the case at all...

Where do you people get this information?

 

[Mr. Sinister]

That is not the case at all...

Where do you people get this information?

That's the way it used to be before you could remove the studs with a hex key. I think some people also had luck with tilting the engine to take the head off.

 

[WhtMa71]

In the car you have to put the studs in with the head already on..It was such a PITA.

 

[Jaguar_5]

That's the way it used to be before you could remove the studs with a hex key. I think some people also had luck with tilting the engine to take the head off.

Ooh interesting...

Even still, they're only supposed to be finger tight...

 

[starscream5000]

Studs are better, search my friend to find out why. You'll find a good hour's worth of reading just on this subject on this forum guaranteed.

 

[noah89t]

Studs are better

why? i could search of course, but if you know of some scientific reason why you said studs are better, i would like to know. i have been using bolts for 6 years now with no problems.

 

[BJ91T]

They have a higher clamp force than bolts, I would still like to see a set of arps "exotic metal" studs made for the 7m.

 

[starscream5000]

They have a higher clamp force than bolts, I would still like to see a set of arps "exotic metal" studs made for the 7m.

Higher clamping force, more even distrobution of torque throughout, and less friction involved vs. studs, thus equalling more actual torque being applied and not being lost through the friction of tightening a bolt down .

 

[BlackDevilSupra]

Did it even occur to you that you could possibly get more technical and accurate information if you perused, browsed, and read the technical bulletins at the ARP website? :dunno:
http://www.arp-bolts.com/Tech/Tech.html

Just wondering, whats the difference between Arps Head Bolts and head Studs.
Which is better and what do many of you guys use ??
Also do any of you guys have to do anything to the block or the head for these to fit ?? or is it a direct fit ?

 

[fonz87]

i know but i like to know what many of you guys use ?

 

[Rennat]

studs in ANY motor i build...

 

[noah89t]

They have a higher clamp force than bolts

80 foot lbs. is 80 foot. lbs. I took this from arp's site
2. Do I need head bolts or studs for my engine?

This depends on the installation. On many street-driven vehicles, where the master cylinders and other items protrude into the engine compartment, it’s probably necessary to use head bolts so that the cylinder heads can be removed with the engine in the car. For most applications, however, studs are recommended. Using studs will make it much easier to assemble an engine with the cylinder head and gasket assured of proper alignment. Studs also provide more accurate and consistent torque loading.

3. Do the head studs only go in hand tight?

The studs should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. An undercut shorter stud will have a rate similar to a longer, standard shank stud. This provides a more even clamping force on the head. Because the head gasket will compress upon initial torquing, make sure studs (or bolts) are re-torqued after the engine has been run.

 

[johnbot123]

dont mean to hijack your thread but, is there an ARP valve cover kit? i wud really like one so my vavle covers stop leaking. :3d_frown:

 

[noah89t]

dont mean to hijack your thread but, is there an ARP valve cover kit? i wud really like one so my vavle covers stop leaking. :3d_frown:

not sure about arp, but you can do like many other people here and get some new bolts with lock washers and loctite. i used stainless bolts. just don't over tighten them, you can crack a valve cover. trust me.

 

[johnbot123]

not sure about arp, but you can do like many other people here and get some new bolts with lock washers and loctite. i used stainless bolts. just don't over tighten them, you can crack a valve cover. trust me.

thats not a bad idea. but for some reason i wud sleep better knowing that the wont stretch when tightened like OEM toyota bolts tend to do.....right?

 

[WhtMa71]

I dont think theres enough torque on the VC screws to stretch them. I think its more a problem with them backing out. I put loctite on all my VC screws and they dont leak yet.

 

[jdub]

i know but i like to know what many of you guys use ?

In other words, you are lazy and want the answer handed to you vs making up your own mind.
The ARP site gives you a technical answer to the question.

They have a higher clamp force than bolts, I would still like to see a set of arps "exotic metal" studs made for the 7m.

This is incorrect. Studs do not clamp tighter, they clamp more evenly with a more uniform torque. They do not have the torsional issues with the shaft that bolts do. Don't know why you want "exotic metal" (other than just for "bragging rights")...the alloy ARP uses in their studs and bolts is more than up to the task.

thats not a bad idea. but for some reason i wud sleep better knowing that the wont stretch when tightened like OEM toyota bolts tend to do.....right?

At 22 in/lbs (not ft/lbs), the valve cover bolts are not going to stretch
(Red beat me)