Rb25det oem vs arp main studs - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ANVIL · 02-03-2016, 10:14 PM

Can i reuse stock main bolts? Or should i just upgrade? What would be the benefit over stock?

Gorman240 · 02-04-2016, 07:05 AM

I would just upgrade, the strength of ARP bolts are far much greater than stock. ARP designed their bolts to be reusable and strong, so if you ever need to reuse them again you can do so without worry. Most stock head bolts are designed to be a one and done type of deal.

ANVIL · 02-04-2016, 08:02 AM

Im doing arp head studs just wondering more about the crank main cap bolts.

Gorman240 · 02-04-2016, 08:47 AM

Main Bolts are okay to reuse, I would still suggest getting ARP if you can afford it in your build.

Croustibat · 02-04-2016, 10:21 AM

Read the installation instruction on their website to find out why you should not be doing that.

Or just go and pray hard you didn't need any machining work.

ANVIL · 02-04-2016, 11:21 AM

Quote:

Originally Posted by Croustibat

Read the installation instruction on their website to find out why you should not be doing that.

Or just go and pray hard you didn't need any machining work.

Elaborate pls

ANVIL · 02-04-2016, 11:21 AM

Fsm has no mention of having to replace main bolts when reassembling

Mitsubayati · 02-04-2016, 12:10 PM

Head bolts tend to stretch past the elastic limit and once that has happened you need to buy a new set, whether it's oem or arp. People suggest changing the head bolts because nobody really has the tools to measure head bolt stretch and it's just cheaper to buy new than hope old bolts are still good. Main bolts are typically re-used because they seem not to stretch as easily. If you purchase new main bolts you will likely want to take them to a machine shop with the block to ensure that the mains are still in spec when torqued as the new bolts could cause an out of round situation.

TLDR version: Buy ARP because it assures correct clamping force better than stock. Do not re-use stock unless you want HG issues down the line.

02-03-2016, 10:14 PM	#1
ANVIL Zilvia FREAK! Join Date: Apr 2005 Location: Anchorage, Alaska Posts: 1,174 Trader Rating: (8) Feedback Score: 8 reviews	Rb25det oem vs arp main studs Can i reuse stock main bolts? Or should i just upgrade? What would be the benefit over stock?

02-04-2016, 12:10 PM	#8
Mitsubayati Zilvia FREAK! Join Date: Aug 2007 Location: The Dro Posts: 1,424 Trader Rating: (18) Feedback Score: 18 reviews	Head bolts tend to stretch past the elastic limit and once that has happened you need to buy a new set, whether it's oem or arp. People suggest changing the head bolts because nobody really has the tools to measure head bolt stretch and it's just cheaper to buy new than hope old bolts are still good. Main bolts are typically re-used because they seem not to stretch as easily. If you purchase new main bolts you will likely want to take them to a machine shop with the block to ensure that the mains are still in spec when torqued as the new bolts could cause an out of round situation. TLDR version: Buy ARP because it assures correct clamping force better than stock. Do not re-use stock unless you want HG issues down the line. __________________

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02-04-2016, 07:05 AM	#2
Gorman240 Join Date: Aug 2012 Location: Indianapolis IN Age: 31 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	I would just upgrade, the strength of ARP bolts are far much greater than stock. ARP designed their bolts to be reusable and strong, so if you ever need to reuse them again you can do so without worry. Most stock head bolts are designed to be a one and done type of deal.

02-04-2016, 08:02 AM	#3
ANVIL Zilvia FREAK! Join Date: Apr 2005 Location: Anchorage, Alaska Posts: 1,174 Trader Rating: (8) Feedback Score: 8 reviews	Im doing arp head studs just wondering more about the crank main cap bolts.

02-04-2016, 08:47 AM	#4
Gorman240 Join Date: Aug 2012 Location: Indianapolis IN Age: 31 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Main Bolts are okay to reuse, I would still suggest getting ARP if you can afford it in your build.

02-04-2016, 10:21 AM	#5
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 43 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	Read the installation instruction on their website to find out why you should not be doing that. Or just go and pray hard you didn't need any machining work.

02-04-2016, 11:21 AM	#7
ANVIL Zilvia FREAK! Join Date: Apr 2005 Location: Anchorage, Alaska Posts: 1,174 Trader Rating: (8) Feedback Score: 8 reviews	Fsm has no mention of having to replace main bolts when reassembling