Main studs
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From: Arlington Heights, IL
Main studs
Recently heard from a friend that ARP mains studs if torqued to ARP specs have know to damage the bearings. I'm concerned because I've been building my car on and off for a few years now and have these bearings in the motor. The last thing I want to happen is to start my engine and a few months down the road, have to tear down the whole motor down again.
I've also read that when using the main stud you also have to have the mains align honed if you plan to run the studs. Is this true?
I haven't started my motor yet and if there is any truth to this, I might just take those out and replace them with OEM ones.
Anyone heard of this?
Modified by lupin5 at 8:08 PM 5/18/2008
I've also read that when using the main stud you also have to have the mains align honed if you plan to run the studs. Is this true?
I haven't started my motor yet and if there is any truth to this, I might just take those out and replace them with OEM ones.
Anyone heard of this?
Modified by lupin5 at 8:08 PM 5/18/2008
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From: middleburgh, ny, us
Re: Main studs (lupin5)
Yes if you plan on using arp main studs you might have to get it alignhoned. if done right will be ok, but since hondas have the oil pump running off the crankshaft there is always the risk of failure. i would suggest you get new oem main bolts instead.
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From: 24601
Re: Main studs (lupin5)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lupin5 »</TD></TR><TR><TD CLASS="quote">I've also read that when using the main stud you also have to have the mains align honed if you plan to run the studs. Is this true?</TD></TR></TABLE>
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.
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From: Mrs. Sauga, Ontario, Canada
Re: Main studs (lupin5)
Torque down the ARP's and measure with a bore gauge for out-of-round. If it measures within spec run it as is.
I'd hesitate at alignhoning for the reason 'Turbo B18C EJ6' mentioned.
I'd hesitate at alignhoning for the reason 'Turbo B18C EJ6' mentioned.
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From: Atl. Beach, fl, duval
Re: Main studs (Dogginator)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator »</TD></TR><TR><TD CLASS="quote">
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.</TD></TR></TABLE> Well if a fastner is just a fastner, why even bother with ARP head studs, rod bolts, and Main studs?
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.</TD></TR></TABLE> Well if a fastner is just a fastner, why even bother with ARP head studs, rod bolts, and Main studs?
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From: Arlington Heights, IL
Re: Main studs (stumpyf4)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stumpyf4 »</TD></TR><TR><TD CLASS="quote">Torque down the ARP's and measure with a bore gauge for out-of-round. If it measures within spec run it as is.
I'd hesitate at alignhoning for the reason 'Turbo B18C EJ6' mentioned.</TD></TR></TABLE>
I was think about that but my motor is already in the car. I might just drop the pan, get OEM ones and torque to spec.
I'd hesitate at alignhoning for the reason 'Turbo B18C EJ6' mentioned.</TD></TR></TABLE>
I was think about that but my motor is already in the car. I might just drop the pan, get OEM ones and torque to spec.
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From: Arlington Heights, IL
Re: Main studs (Dogginator)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator »</TD></TR><TR><TD CLASS="quote">
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.</TD></TR></TABLE>
You would think that would be the case, and all you would have to do is torque the new studs to spec. But I do believe ARP has different specs then OEM ones when torquing the main studs. I built my motor so long ago, I dont remember what I torqued the main studs to. I'll have to find out what the difference in specs between the two are. I wonder if I you could torque the ARPs using the OEM specs? Or would that not work?
I have never heard of this. Did you come across any reasoning? I would think that a fastener (bolt or stud) is a fastener, provided the shank tension is equivalent.</TD></TR></TABLE>
You would think that would be the case, and all you would have to do is torque the new studs to spec. But I do believe ARP has different specs then OEM ones when torquing the main studs. I built my motor so long ago, I dont remember what I torqued the main studs to. I'll have to find out what the difference in specs between the two are. I wonder if I you could torque the ARPs using the OEM specs? Or would that not work?
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From: 24601
Re: Main studs (DonF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF »</TD></TR><TR><TD CLASS="quote"> Well if a fastner is just a fastner, why even bother with ARP head studs, rod bolts, and Main studs?</TD></TR></TABLE>
You use a stud vs. a blind bolt to establish more accurate bolt tension when torqued. My point is that the intended tension should be equivalent, whether a stud or blind bolt is utilized. Many factors affect the shank tension vs. applied torque such as thread friction, shank friction (blind bolt), Poisson's ratio, etc. I could see why the ARP studs have a different torque spec due to fastener design differences. A fastener's ultimate strength should not affect it's assembly tension.
If the increased bolt tension is deforming the main caps, I see that as a problem that warrants a reduced faster torque.
You use a stud vs. a blind bolt to establish more accurate bolt tension when torqued. My point is that the intended tension should be equivalent, whether a stud or blind bolt is utilized. Many factors affect the shank tension vs. applied torque such as thread friction, shank friction (blind bolt), Poisson's ratio, etc. I could see why the ARP studs have a different torque spec due to fastener design differences. A fastener's ultimate strength should not affect it's assembly tension.
If the increased bolt tension is deforming the main caps, I see that as a problem that warrants a reduced faster torque.
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From: north jersey (973)
Re: Main studs (DonF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF »</TD></TR><TR><TD CLASS="quote"> Well if a fastner is just a fastner, why even bother with ARP head studs, rod bolts, and Main studs?</TD></TR></TABLE>
You use a stud vs. a blind bolt to establish more accurate bolt tension when torqued. My point is that the intended tension should be equivalent, whether a stud or blind bolt is utilized. Many factors affect the shank tension vs. applied torque such as thread friction, shank friction (blind bolt), Poisson's ratio, etc. I could see why the ARP studs have a different torque spec due to fastener design differences. A fastener's ultimate strength should not affect it's assembly tension.
If the increased bolt tension is deforming the main caps, I see that as a problem that warrants a reduced faster torque.
You use a stud vs. a blind bolt to establish more accurate bolt tension when torqued. My point is that the intended tension should be equivalent, whether a stud or blind bolt is utilized. Many factors affect the shank tension vs. applied torque such as thread friction, shank friction (blind bolt), Poisson's ratio, etc. I could see why the ARP studs have a different torque spec due to fastener design differences. A fastener's ultimate strength should not affect it's assembly tension.
If the increased bolt tension is deforming the main caps, I see that as a problem that warrants a reduced faster torque.
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