Thread lock

Nourish

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Dec 2, 2009
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If you were to type in High temp Loctite into google you'd get various offerings - so Im looking to secure my crankshaft nuts - which one do I choose?
 
IMHO, Locktite is never needed in an engine using standard fasteners. I can think of nothing I would ever use red Locktite on unless I went to work building battleships or single-use rockets.

Yes, the MK3 workshop says to use Locktite 241 on the crank bolts but also 30 ft lb. Since all before that they say nothing about Locktite and only 25 ft lb. it's quite unlikely that any is needed and I've not seen any used on original pre-MK3 cranks.
 
concours said:
Those fasteners will come apart with hand tools, cold, with no damage, when I decide it's time.

Done it to thousands of similar sized fasteners, for half a century.
Click to expand...
You must be way stronger and me and have much better tools! Red Locktite is specifically designed to not come apart with hand tools!
 
I have a small propane torch just for accessible bolts but for the most part they come apart with common tools When aluminum is involved I will use blue Locktite. By the way I love the Locktite gasket maker #515
 
Nourish said:
If you were to type in High temp Loctite into google you'd get various offerings - so Im looking to secure my crankshaft nuts - which one do I choose?
Click to expand...
Don’t forget, as soon as you apply loctitie the threads are no longer dry, so all your torque answers are now out of the window :eek:
 
marshg246 said:
You must be way stronger and me and have much better tools! Red Locktite is specifically designed to not come apart with hand tools!
Click to expand...
No, you caught me Greg, red-handed, talking out my arse, having never really done any of this stuff.
Making stuff up, and trying to give guidance on things I have no knowledge of.
Theoretical BS.
Every word.
A genuine armchair engineer.

You'd better hurry, PM the original poster, and give him PROPER mechanical advice.

😎🍻🤣

Thread lock
 
Last edited:
concours said:
No, you caught me Greg, red-handed, talking out my arse, having never really done any of this stuff.
Making stuff up, and trying to give guidance on things I have no knowledge of.
Theoretical BS.
Every word.
A genuine armchair engineer.

You'd better hurry, PM the original poster, and give him PROPER mechanical advice.Whatever!

😎🍻🤣
Click to expand...
 
concours said:
No, you caught me Greg, red-handed, talking out my arse, having never really done any of this stuff.
Making stuff up, and trying to give guidance on things I have no knowledge of.
Theoretical BS.
Every word.
A genuine armchair engineer.

You'd better hurry, PM the original poster, and give him PROPER mechanical advice.

😎🍻🤣
Click to expand...
Whatever!
 
My son used red lock tight on the sludge trap plug of a BSA A65. Years later I took the crank to Marine Crankshaft for some work, and they had to destroy it to get it out. I replaced it with a hex drive plug and no lock tight.
 
It is funny, I wouldn't think of using any on Carrillo rod bolts or ARP but I have used a tad bit on the original hardware.

If you use too much, the heat required to remove will destroy the nut, and maybe the rod!

I don't think it is necessary to use any if the nuts still have a working lock function.
 
Last edited:
Please excuse me here - I just come across this on a sellers ad on Ebay - it's long!
There appears a lot of different colours - I suppose not to be confused with other manufacturers colours but the red ones look to be for a permanent fix - so maybe not on the crank
Just how hot are the fasteners on the crank going to get - any more than oil temp?
Mick Hemmings in his video recommended putting on a little of threadlock on the big end lock nuts and then torqued to the recommended 25lb/in - now he new a thing or two about Nortons

Product name: Loctite 222
Product specification 50ml
Color: purple liquid
Chemical type: methacrylate
Viscosity: 1200-5000 mpa, s
Breaking torque: 6Nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
Suitable for most metal surfaces, removable with common tools, for locking and sealing of M2M12 threads. Lubricity to achieve accurate clamping load

Product Name: Loctite 241
Specification: 50ml
Color: Blue
Type: General purpose/medium strength/thixotropic viscosity
Viscosity: 1200/5000 mpa. S
Average disassembly torque: 4.9Nm
Average failure moment: 12.4nm
Temperature range: -18/150℃
Curing speed: 24 hours
Recommended accelerators: 7649/7471
Relative density: 1
Used for lock and seal of M6 - M2o thread. It is a thread locking agent which can be disassembled with common tools. Lubricity to achieve accurate clamping load

Product name: Loctite 242
Package specification: 50ML
Product color: blue
Viscosity: 1200/5000
Curing speed: 10 hours
Temperature range: -54°C/150°C
Relative density: 12.4
Average disassembly torque: 4.9Nm
Average failure moment: 12.4nm
Product features: This product under the condition of air isolation in the two close together between the metal curing, especially suitable for the inert surface to prevent its due to shock and vibration caused by the loosening and leakage

Product name: Loctite 243
Package specification: 50ML
Product color: blue
Viscosity: 1300/3000
Curing speed: 3 hours
Temperature range: -54°C/150%C
The relative density is 1.05
Average disassembly torque: 7Nm
Average failure moment: 20nm
Product features:
The liquid oxygen type seal product is shockproof, shockproof and leakproof

Product name: Loctite 270
Product specifications 50ml
Color: green liquid
Chemical type: methacrylate
Viscosity: 400-600 mpa, s
Breaking torque: 16-36nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
To avoid loosening and leakage of threaded fasteners, especially for heavy load parts, such as cylinder head stud, pump cover stud nut, and other heavy load fasteners

Product name: Loctite 277
Package specification: 50ML
Product color: red
Product type: thread locking agent/high strength/high viscosity/excellent chemical resistance
Viscosity: 6000/800
Curing speed: 12 hours
Temperature range: -54°C/150°C
Relative density: 1.12
Average disassembly torque: 32Nm
Average failure moment: 32nm
Product features:
Permanent locking and sealing for threads up to 36 prevents thread rusting and corrosion, heating and tool disassembly

Product name: Lottite 290
Package specification: 50ml
Product color: green
Product type: thread locking agent/medium strength/low viscosity/fast curing/penetration grade
Viscosity: 25/55
Curing speed: 6 hours
Temperature range: -54°C/150°C
Relative density: 1.08
Average disassembly torque: 29Nm
Average failure moment: 10nm
Product features:
For m6-M12 thread locking and sealing can also be used to seal weld castings such as sand holes (0.254mm below) to prevent thread rust and corrosion

Product name: Loctite 262
Package specification: 50/250ML
Product color: red
Product type: Thread locking agent/medium and high strength
Viscosity: 1200/2400
Curing speed: 10 hours
Temperature range: -54°C/150%°C
Relative density 1.1
Average disassembly torque: 32Nm
Average failure moment: 22nm
Product features:
Lock seal for threads up to M20 is a permanent lock thread locking agent with excellent rust and corrosion resistance in extreme chemical environments

Product name: Lottite 272
Package specification: 50 ML
Product color: orange red
Product type: thread locking agent/high temperature resistant/high strength
Viscosity: 4000/5000
Curing speed: 24 hours
Temperature range: -54°C/150 °C
Relative density: 1.11
Average disassembly torque: 25Nm
Average failure moment: 23nm
Product features:
Used for cylinder double head thread locking can be quickly cured including without special surface treatment firmware recommended for bolt disassembly up to diameter 1.5 where heating and the use of tools are required

Product name: Loctite 263
Product specification: 50 ml
Color: red liquid
Chemical type: methacrylate
Viscosity: 400-600 mpa, s
Breaking torque: 36Nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
Suitable for permanent locking of stud bolts and pressure parts for heavy duty applications, high strength formula combines all advantages in one. Heat resistance to 180°C enhances reliability for high temperature applications

Product name: Lottite 271
Package specification: 50 ML
Product color: red
Product type: thread locking agent/high strength/medium and low viscosity
Viscosity: 400/600
Curing speed: 24 hours
Temperature range: -54°C/150°C
Relative density: 1.1
Average disassembly torque: 25Nm
Average failure moment: 17nm
Product features: used for permanent locking and sealing of threads below M36
 
Nourish said:
Please excuse me here - I just come across this on a sellers ad on Ebay - it's long!
There appears a lot of different colours - I suppose not to be confused with other manufacturers colours but the red ones look to be for a permanent fix - so maybe not on the crank
Just how hot are the fasteners on the crank going to get - any more than oil temp?
Mick Hemmings in his video recommended putting on a little of threadlock on the big end lock nuts and then torqued to the recommended 25lb/in - now he new a thing or two about Nortons

Product name: Loctite 222
Product specification 50ml
Color: purple liquid
Chemical type: methacrylate
Viscosity: 1200-5000 mpa, s
Breaking torque: 6Nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
Suitable for most metal surfaces, removable with common tools, for locking and sealing of M2M12 threads. Lubricity to achieve accurate clamping load

Product Name: Loctite 241
Specification: 50ml
Color: Blue
Type: General purpose/medium strength/thixotropic viscosity
Viscosity: 1200/5000 mpa. S
Average disassembly torque: 4.9Nm
Average failure moment: 12.4nm
Temperature range: -18/150℃
Curing speed: 24 hours
Recommended accelerators: 7649/7471
Relative density: 1
Used for lock and seal of M6 - M2o thread. It is a thread locking agent which can be disassembled with common tools. Lubricity to achieve accurate clamping load

Product name: Loctite 242
Package specification: 50ML
Product color: blue
Viscosity: 1200/5000
Curing speed: 10 hours
Temperature range: -54°C/150°C
Relative density: 12.4
Average disassembly torque: 4.9Nm
Average failure moment: 12.4nm
Product features: This product under the condition of air isolation in the two close together between the metal curing, especially suitable for the inert surface to prevent its due to shock and vibration caused by the loosening and leakage

Product name: Loctite 243
Package specification: 50ML
Product color: blue
Viscosity: 1300/3000
Curing speed: 3 hours
Temperature range: -54°C/150%C
The relative density is 1.05
Average disassembly torque: 7Nm
Average failure moment: 20nm
Product features:
The liquid oxygen type seal product is shockproof, shockproof and leakproof

Product name: Loctite 270
Product specifications 50ml
Color: green liquid
Chemical type: methacrylate
Viscosity: 400-600 mpa, s
Breaking torque: 16-36nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
To avoid loosening and leakage of threaded fasteners, especially for heavy load parts, such as cylinder head stud, pump cover stud nut, and other heavy load fasteners

Product name: Loctite 277
Package specification: 50ML
Product color: red
Product type: thread locking agent/high strength/high viscosity/excellent chemical resistance
Viscosity: 6000/800
Curing speed: 12 hours
Temperature range: -54°C/150°C
Relative density: 1.12
Average disassembly torque: 32Nm
Average failure moment: 32nm
Product features:
Permanent locking and sealing for threads up to 36 prevents thread rusting and corrosion, heating and tool disassembly

Product name: Lottite 290
Package specification: 50ml
Product color: green
Product type: thread locking agent/medium strength/low viscosity/fast curing/penetration grade
Viscosity: 25/55
Curing speed: 6 hours
Temperature range: -54°C/150°C
Relative density: 1.08
Average disassembly torque: 29Nm
Average failure moment: 10nm
Product features:
For m6-M12 thread locking and sealing can also be used to seal weld castings such as sand holes (0.254mm below) to prevent thread rust and corrosion

Product name: Loctite 262
Package specification: 50/250ML
Product color: red
Product type: Thread locking agent/medium and high strength
Viscosity: 1200/2400
Curing speed: 10 hours
Temperature range: -54°C/150%°C
Relative density 1.1
Average disassembly torque: 32Nm
Average failure moment: 22nm
Product features:
Lock seal for threads up to M20 is a permanent lock thread locking agent with excellent rust and corrosion resistance in extreme chemical environments

Product name: Lottite 272
Package specification: 50 ML
Product color: orange red
Product type: thread locking agent/high temperature resistant/high strength
Viscosity: 4000/5000
Curing speed: 24 hours
Temperature range: -54°C/150 °C
Relative density: 1.11
Average disassembly torque: 25Nm
Average failure moment: 23nm
Product features:
Used for cylinder double head thread locking can be quickly cured including without special surface treatment firmware recommended for bolt disassembly up to diameter 1.5 where heating and the use of tools are required

Product name: Loctite 263
Product specification: 50 ml
Color: red liquid
Chemical type: methacrylate
Viscosity: 400-600 mpa, s
Breaking torque: 36Nm
Curing speed: initial setting /10 minutes, full setting /24 hours
Heat resistance: - 54 ° C + 150 ° C
Shelf life: 24 months (8-21°C cool and dry place)
Application:
Suitable for permanent locking of stud bolts and pressure parts for heavy duty applications, high strength formula combines all advantages in one. Heat resistance to 180°C enhances reliability for high temperature applications

Product name: Lottite 271
Package specification: 50 ML
Product color: red
Product type: thread locking agent/high strength/medium and low viscosity
Viscosity: 400/600
Curing speed: 24 hours
Temperature range: -54°C/150°C
Relative density: 1.1
Average disassembly torque: 25Nm
Average failure moment: 17nm
Product features: used for permanent locking and sealing of threads below M36
Click to expand...
Yes, lots for lots of different uses. Norton said 241 for the MK3. It's plenty high enough temperature.
 
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