Loctite And How To Use IT

Indycars

Administrator
Staff member
I thought it was just a matter of picking a number, put a few drops on the threads and tighten,
but that's not the case. Loctite dries in the absence of air and in the presence of metal ions. Or
what's referred to as an Active Metal.

OK, so what metals are active and which ones are inactive?

Loctite Active-Inactive Metals.JPG
So when I've been using SS bolts into aluminum, I wasn't getting Loctite to fully cure.

When you are installing a bolt into a blind hole, then it's recommended that you put several drops
in the bottom of the hold to displace the air. Remember if there is air it's not going to cure.

Loctite Instructions

  • For best results, clean all surfaces (external and internal) with a LOCTITE® cleaner and allow to dry.
    If the material is an inactive metal or the cure speed is too slow, spray all threads with an activator such as LOCTITE® 7471 or 7649 and allow to dry.
  • Shake the product thoroughly before use.
  • To prevent the product from clogging in the nozzle, do not allow the tip to touch metal surfaces during application.
  • For thru holes, apply several drops of the product onto the bolt at the nut engagement area.
  • For blind holes, apply several drops of the product down the internal threads to the bottom of the hole.
  • Assemble and tighten as required.
  • For sealing applications, apply a 360° bead of product to the leading threads of the male fitting, leaving the first thread free. Force the material into the threads to thoroughly fill the voids. For bigger threads and voids, adjust product amount accordingly and apply a 360° bead of product on the female threads also.

There are many different versions of Loctite threadlocker, the application charts below should be of some help.

Loctite Application Chart.JPG

Loctite Spec Chart.jpg
“Do It Right” User’s Guide
The “When, Where & How” to Use Loctite® Automotive Maintenance Products

http://na.henkel-adhesives.com/us/content_data/316041_FINAL_LT4680_AAM_Do_It_Guide_v7.pdf

Videos
http://videos-loctite.na.henkel-adh...toreelementid=24959&cmd_execute=1&vlperpage=5

http://na.henkel-adhesives.com/industrial/vehicle-repair-and-maintenance-threadlockers-22093.htm
 
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great informative post!..:D thanks rick!!


Loctite Threadlocker Red 271 is designed for the permanent locking and sealing of threaded fasteners. The product cures when confined in the absence of air between close fitting metal surfaces. It protects threads from rust and corrosion and prevents loosening from shock and vibration. It is only removable once cured by heating up parts to 500°F (260°C).
Prevents rusting of threads
Permanent seal, prevents tampering
Prevents loosening of metal fasteners caused by vibrations
Protects threads
High strength
Locks threads

Loctite's Big Secret!

Elliot Paulsen
Ahhh that half sweet half pungent smell of the notorious Loctite. We have all been using the stuff for years on everything from Harley Davidson's to the craziest of industrial machines, and down to the smallest of electronics. There may be many brands of thread locker but one brand sticks out and is a house hold name, Loctite

So with millions of users daily, how can this goliath of a brand have such a secret? The answer simply lies in advertisement and product saturation of the market. Currently if one is to google Loctite or Thread locker countless brands come flooding in the search fields overloading the senses. Locktite alone manufactures more than 20 different blends for all different applications.

384b05_307844db38e64a32b654fe937204d4e3~mv2.png

The big secret lies in a newer call the "QuikStix" series. This product is the time old Loctite in a glue stick form in the common Blue / Red / Green strengths. Now I can hear the readers now, "Gel thread locker has been around for ages" . It has, but its not the same nor is it one to de throne this king of the thread locking world!



Why is this product worth the praise? It has a few key features that make it a hands down winner.



#1 - Have you ever been laying under a car and tried to put liquid thread locker on a vertical bolt? If you have you know the frustration trying to squeeze the tube just enough but not too much just to make a mess and still not get the locker applied in the proper location where the nut will end up. The Stick excels here just twist the applicator and dab some on. This product eliminates the challenge of vertical application



#2 - No mess! Often times in between applications you need to set the thread locker down. With a full bottle / tube of liquid you often end up with dripping or with a low bottle your tapping and shaking it to the nozzle again wasting time and creating a mess. The QuikStik is always ready to go and does not leak.

384b05_4cd26ff0fc9f40309f79dc455e5ee923~mv2.png

#3 - Working time, the stick products have a longer working time that allows you to apply the product and re torque or move the bolt with more time before setting up. I have had some issues in the past with liquids setting up so quick that by the time I was able to do the final torque pass or get the parts aligned that the thread locker bond was broken by the final tightening. This is what originally sent me down the path of finding a slower working thread locker and I came across this killer product.




I assume your aware there is loctite solvent?

www.hisco.com

Loctite 768 - Clean Up Solvent for Instant Adhesives, 2oz

<p>The Loctite 768™ is a clear cleaning solvent that comes in a 1.75 fl oz bottle. The flammable liquid is designed to clean and dissolve cured cyanoacrylate based adhesives, it is great for use in the disassembly of parts and cleanup of dispensing equipment.</p><b>Loctite 768™...
www.hisco.com
www.hisco.com
https://www.leevalley.com/en-us/sho...MIhKKzpfub-gIViBJMCh2b4Qf7EAQYByABEgL8w_D_BwE
 
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Monel is Super Exotic Stainless.
Find only in Blast Funaces & Nuclear power plants.

Hard to get local.
 
I would point out that use of safety wired nuts and castle nuts with cotter pins, is in many applications, a separate,
and in my opinion better option ,
in that its both secure and easily removed if required, and less temp sensitive than chemical bonding agents.
yes obviously there are applications where loc-tite is the better option, and places where anti-seize and a castle nut and cotter pin or safety wire use is the best option.

http://garage.grumpysperformance.co...afety-wire-locking-fasteners.4306/#post-67524
axlenutM24.jpg

safe3.jpg

safe4.JPG

I would strongly suggest BOTH stainless bolts studs and the use of ANTI SEIZE on the threads
arp-434-1301_w.jpg


studal3.jpg

studal2.jpg

studal1.jpg

http://garage.grumpysperformance.com/index.php?threads/cotter-pins.4733/#post-12852
 
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Thanks Rick. I will have to save this. There are some things there that I didn't realize.
 
There are some things there that I didn't realize.
That makes two of us!

Not sure how I got started researching this, but looks like it might payoff. My ARP exhaust studs
should be here today, but now I need to order some primer. Not sure how hot it gets in the exhaust
threads, it may exceed the Loctite capabilities.

Loctite also has a version that you can apply after the fastener has been tightened, it wicks into the
threads and locks them.
 
That makes two of us!

Not sure how I got started researching this, but looks like it might payoff. My ARP exhaust studs
should be here today, but now I need to order some primer. Not sure how hot it gets in the exhaust
threads, it may exceed the Loctite capabilities.

Loctite also has a version that you can apply after the fastener has been tightened, it wicks into the
threads and locks them.
It gets real hot Rick.
400-500 on Header primarily tubes.
Exhaust manifolds same.
Wide open throttle Race likely 700-750 F.

Since the bolts or studs do the clamping right to the header instant short heat transfer takes direct to the bolts or studs.
Loctite will melt away.
Nickle Anti sieze.
Install finger tight.
Or just 4-5 ft/lbs the studs each.
 
Gets so Hot there is Electron Emission taking place.
Why Exhaust fasteners degrade.

Just like Old Radio Vacuuum tubes working.
Electron emission.

Why Monel is best.
Have to be custom Monel bolts or studs.
Figure $1,000 cash.

Titanium costs less.
 
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