ARP Ultra-Torque lube on LM7 head bolts
#1
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I'm putting reworked 862's on my LM7 using ARP head bolts.
Per the directions, I coated the threads and under the bolt head and put them in initially finger tight. As I get close to having them finger tight, I hear a slight sound from some of the holes. Weird, right?
I pulled the bolt out and find some light gray fluid in the bottom of the hole.
I recleaned everything and reinstalled the bolt with a small amount of lube and the same thing happens. I coat the threads and wipe off any excess. I've done this on a few engines.
ARP tech support said to put alot on the threads and don't worry about any separating out fluid that resuts in the bottom of the bolt hole. I think the lube base carrier is what I saw.
How much lube is enough and am I concerned about nothing? Am I using too much? I don't feel there should be any residual fluid in the bolt hole.
Apologize for the wordiness!
Per the directions, I coated the threads and under the bolt head and put them in initially finger tight. As I get close to having them finger tight, I hear a slight sound from some of the holes. Weird, right?
I pulled the bolt out and find some light gray fluid in the bottom of the hole.
I recleaned everything and reinstalled the bolt with a small amount of lube and the same thing happens. I coat the threads and wipe off any excess. I've done this on a few engines.
ARP tech support said to put alot on the threads and don't worry about any separating out fluid that resuts in the bottom of the bolt hole. I think the lube base carrier is what I saw.
How much lube is enough and am I concerned about nothing? Am I using too much? I don't feel there should be any residual fluid in the bolt hole.
Apologize for the wordiness!
#4
TECH Addict
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As long as the bolt doesn't compress the fluid in the bottom of the hole it shouldn't be a issue,
If it was bottoming on the liquid tightening could generate some pretty high hydraulic pressure in the hole.
If it was bottoming on the liquid tightening could generate some pretty high hydraulic pressure in the hole.
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G Atsma (01-26-2023)
#6
TECH Senior Member
iTrader: (1)
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overthinking ? placing the lube on the threads means as the bolt is tightened the lube will travel up the threads...that is the lube that is excess...so can you over lube ? not likely
def do NOT place the lube IN the bolt hole...that would give excess lube no way to escape
def do NOT place the lube IN the bolt hole...that would give excess lube no way to escape