How many times can ARP head bolts be whored?
01-17-2008, 09:58 PM
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How many times can ARP head bolts be whored? I have some ARP hex head bolts and have re-used them only once after the first time. They are now off and im wondering if I can re-use them again?
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04-02-2008, 11:08 AM
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Technically, you can use them as many times as you want, but personally, I like to change mine out every 3-5 applications. I know it's overkill, but I'd rather have the peace of mind.
My rational is this - most torque wrench's accuracy are within +/- 3%-4%, so different torque ratings change per application - depending on how your wrench was feeling that day. Hardware fatigue (either by manufacturing or improper installation) is the #1 cause of blown engines, so I never chance it.
Vince
My rational is this - most torque wrench's accuracy are within +/- 3%-4%, so different torque ratings change per application - depending on how your wrench was feeling that day. Hardware fatigue (either by manufacturing or improper installation) is the #1 cause of blown engines, so I never chance it.
Vince
04-02-2008, 11:34 AM
#9
Technically, you can use them as many times as you want, but personally, I like to change mine out every 3-5 applications. I know it's overkill, but I'd rather have the peace of mind.
My rational is this - most torque wrench's accuracy are within +/- 3%-4%, so different torque ratings change per application - depending on how your wrench was feeling that day. Hardware fatigue (either by manufacturing or improper installation) is the #1 cause of blown engines, so I never chance it.
Vince
My rational is this - most torque wrench's accuracy are within +/- 3%-4%, so different torque ratings change per application - depending on how your wrench was feeling that day. Hardware fatigue (either by manufacturing or improper installation) is the #1 cause of blown engines, so I never chance it.
Vince
Also make sure you use the lube from ARP for accurate TQ specs and before reinstalling, blow out those bolt holes.
04-02-2008, 07:50 PM
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A little old but of great help! I think I may have to remove my heads again (engine is still on stand) because I didnt clean the holes well enough and I didnt reinstall 2 dowel pins. 
