Proper Way to Use Loc-Tite??
Thread Starter
Drifting
Joined: Aug 2005
Posts: 1,430
Likes: 8
From: Hamilton NJ
Proper Way to Use Loc-Tite??
Folks,
I was kind of surprised that a motor mount bolt I supposedly Loc-Tite'd to my block (with Red# 271) came out without much trouble. Granted, I applied it on a 27 degree January day after more handling than was necessary so I don't know how well it was applied.
To my question(s):
What is the best/proper way to apply this stuff?
Should the threads be fully covered, or is just a couple of drops enough?
Should the bolt be inserted wet, or is it OK if it dries before locking it down?
Once it's in place what should I expect? Everything I've read indicates I'll need both heat and major tools to remove a bolt treated with 271?
Thanks,
Steve
I was kind of surprised that a motor mount bolt I supposedly Loc-Tite'd to my block (with Red# 271) came out without much trouble. Granted, I applied it on a 27 degree January day after more handling than was necessary so I don't know how well it was applied.
To my question(s):
What is the best/proper way to apply this stuff?
Should the threads be fully covered, or is just a couple of drops enough?
Should the bolt be inserted wet, or is it OK if it dries before locking it down?
Once it's in place what should I expect? Everything I've read indicates I'll need both heat and major tools to remove a bolt treated with 271?
Thanks,
Steve
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
The bolt and threads must be clean, free of oil, grease, or coolant. Alcohol works well.
Normally one applies a line of Locite on the male threads of the bolt. There are a few applications where you also apply a line of it into the the female threads.
You need to be careful you don't put so much into the joint that might tend to hydraulical lock the bolt.
Loctite cure in the absense of air, so it won't dry in open air. Also, you don't want to let a bolt sit open with Loctite on it since contamination from the air (dirt, dust,etc.) will weaken the lock.
Loctite 271 might break a soft bolt, but F,G or 10.9 or 12.9 bolts won't break. D or 8.8 bolts usually don't break during disassembly.
Normally one applies a line of Locite on the male threads of the bolt. There are a few applications where you also apply a line of it into the the female threads.
You need to be careful you don't put so much into the joint that might tend to hydraulical lock the bolt.
Loctite cure in the absense of air, so it won't dry in open air. Also, you don't want to let a bolt sit open with Loctite on it since contamination from the air (dirt, dust,etc.) will weaken the lock.
Loctite 271 might break a soft bolt, but F,G or 10.9 or 12.9 bolts won't break. D or 8.8 bolts usually don't break during disassembly.
Racer
Joined: Aug 2005
Posts: 435
Likes: 2
From: Boise Idaho
Loctite rule: With in a week after you loctite the bolts something will need to be replaced where you have take those bolts back off. 
I clean the male thread and put a drop or two on them. Then immediatly screw the bold in place.
I clean the male thread and put a drop or two on them. Then immediatly screw the bold in place.
Drifting
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
The bolt and threads must be clean, free of oil, grease, or coolant. Alcohol works well.
Normally one applies a line of Locite on the male threads of the bolt. There are a few applications where you also apply a line of it into the the female threads.
You need to be careful you don't put so much into the joint that might tend to hydraulical lock the bolt.
Loctite cure in the absense of air, so it won't dry in open air. Also, you don't want to let a bolt sit open with Loctite on it since contamination from the air (dirt, dust,etc.) will weaken the lock.
Loctite 271 might break a soft bolt, but F,G or 10.9 or 12.9 bolts won't break. D or 8.8 bolts usually don't break during disassembly.
Normally one applies a line of Locite on the male threads of the bolt. There are a few applications where you also apply a line of it into the the female threads.
You need to be careful you don't put so much into the joint that might tend to hydraulical lock the bolt.
Loctite cure in the absense of air, so it won't dry in open air. Also, you don't want to let a bolt sit open with Loctite on it since contamination from the air (dirt, dust,etc.) will weaken the lock.
Loctite 271 might break a soft bolt, but F,G or 10.9 or 12.9 bolts won't break. D or 8.8 bolts usually don't break during disassembly.
We use Loctite products daily, surface prep is most important.
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Melting Slicks
Joined: Jan 2007
Posts: 2,589
Likes: 5
From: Salisbury Maryland
271 is a high strength threadlocker used for fasteners up to 1". The primer T or N should be used first. Electrical contact cleaner can be substituted. Since 271 is a low viscosity threadlocker it should require a higher "break point" when dis-assembling. For example: the 262 high strength "breaks" at 190" lbs, the 271 at 230. Tempeature and fixture ratings are the same.
If it broke loose rather easily, the surface probably wasn't primed well. Even a new/clean bolt must be primed. As far as how much to use, several drops to cover the engagement area is sufficient.
Remember, Loctite protects the "engagement" area of the threads and seals that area. It will only cure between the metals so wipe away excess after torqueing. The biggest benefit of Loctite comes with disassembly, whenever that is.
Good Luck!
If it broke loose rather easily, the surface probably wasn't primed well. Even a new/clean bolt must be primed. As far as how much to use, several drops to cover the engagement area is sufficient.
Remember, Loctite protects the "engagement" area of the threads and seals that area. It will only cure between the metals so wipe away excess after torqueing. The biggest benefit of Loctite comes with disassembly, whenever that is.
Good Luck!