06-09-2010
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#1
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
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Torque for Rod Caps with ARPs
Ok, so i wanted to get an opinion on this. I havent dropped the pan yet but i have the feeling the bastard loosened again. or more-so, in the case that it has i would like to know what you all think.
The rods are Manley I Beam baller ass rods, they come with ARP 2000 rod bolts for the caps. Im using the moly lube on the bolts. When i built the motor i torqued it to the factory setting. Everything should have been perfect. I believe i was told it was 38 ft lbs. (if its not dont flame me, it was a while ago that i actually torqued them).
If the case is that the bolts came loose again, should i look into torquing it higher? I know the torque wrench is accurate, its a brand spanking new craftsman torque wrench.
Anyways, What do you guys think, Is this like the ARP Headstuds where i should be torqueing much higher than stock, or what?
Thanks in advance,
Tom
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Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#2
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
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Posts: 7,752
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Re: Torque for Rod Caps with ARPs
Did you not use Plastigauge? That will tell you what the torque spec is.
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"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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06-09-2010
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#3
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immune from paybans
Join Date: Oct 2005
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Re: Torque for Rod Caps with ARPs
I reused my ARP rod bolts and retorqued them to 42 ft-lbs I think. I doubt they came loose on you already, unless you forgot to torque a couple.
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06-09-2010
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#4
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Tournaments Won: 3
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Location: Maple Grove, MN
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by asshanson
I reused my ARP rod bolts and retorqued them to 42 ft-lbs I think. I doubt they came loose on you already, unless you forgot to torque a couple.
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Yeah im absolutly positive i torqued all of them.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#5
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Tournaments Won: 3
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by Matt D.
Did you not use Plastigauge? That will tell you what the torque spec is.
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How would a plastigage tell you what the torque spec is? It only tells you what the clearence is between the bearing and the shaft?
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#6
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by tpunx99GSX
How would a plastigage tell you what the torque spec is? It only tells you what the clearence is between the bearing and the shaft?
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The more torque there is holding the pieces together the less clearance there will be. Just because it says such and such a torque doesn't mean the clearance is correct, and improper clearance is what can make bearings fail.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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06-09-2010
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#7
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immune from paybans
Join Date: Oct 2005
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Re: Torque for Rod Caps with ARPs
Tom, did you make sure you kept the same rods with the same rod caps? That is very important as well. And make sure you didn't put some on backwards?
For some reason I thought I heard someone say they didn't think matching the caps to rods was a big deal, and I'm almost positive you have to keep them the same, just like cam caps, they're machined to be a perfect fit for each other.
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06-09-2010
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#8
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
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Re: Torque for Rod Caps with ARPs
Yes all of the rods were kept with their respecitve caps. And im sure the caps were placed correctly (notches on the oppisite side of each other.)
Im pretty sure one of the bearings just failed (i have a good idea which one). Ill just replace them.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#9
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Re: Torque for Rod Caps with ARPs
You need to know which bolts they came with.
http://www.arp-bolts.com/Tech/TechTorque.html
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"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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06-09-2010
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#10
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Re: Torque for Rod Caps with ARPs
You only check bearing clearances using a plastigauge. Not for bolt torque.
The correct way of tightening rod bolts is using a stretch gauge or maybe a micrometer to check how much the studs have stretched. Also some rods come with differant studs/bolts so you have to figure out what bolts you have to figure out torque value if you choose to use that method.
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20g Mafia
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06-09-2010
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#11
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by 1ViciousGSX
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http://www.maperformance.com/manley-...ting-rods.html
These are the rods i have. It says they come with 3/8" ARP 2000 Bolts.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#12
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by tpunx99GSX
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Did you try taking that info to the ARP paged I linked?
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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06-09-2010
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#13
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
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Re: Torque for Rod Caps with ARPs
I looked on the page but all i could find is the Mitsubishi rod cap bolts, but there was no mencion of the series bolt.
and if thats the case, then i torqued them to the correct specs. So hopefully it was just the bearing messed up i will hope for the best.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#14
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Admin
Join Date: Oct 2003
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Re: Torque for Rod Caps with ARPs
If you look on that page they show specific part numbers of the bolts. You need to contact Manley and find out which bolt they used in your rods. Then you will know which torque spec is correct.
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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06-09-2010
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#15
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Tournaments Won: 3
Join Date: Oct 2003
Location: Maple Grove, MN
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Posts: 7,017
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by 1ViciousGSX
If you look on that page they show specific part numbers of the bolts. You need to contact Manley and find out which bolt they used in your rods. Then you will know which torque spec is correct.
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Thanks Vicious, ill do that.
__________________
Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge. This is significantly different from the common usage of the word "theory", which implies that something is a conjecture, hypothesis, or guess.
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06-09-2010
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#16
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Re: Torque for Rod Caps with ARPs
Quote:
Originally Posted by tpunx99GSX
Thanks Vicious, ill do that.
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Now go have mad monkey sex with your fiance'. 
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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