Quote:
Originally Posted by jimbauman
There was another older thread that talked about Loctite 518 replacing 573/574 - something Warren had recommended. According to the 518 data sheet, as it ages, it increases its resistance to oil, whereas 573/574 decrease their resistance. Lap shear strength compares favorably too.
JB
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Since I got to decide which to use or not using Loctite at all I read the data sheet and found that:
1. 518 loses half of its strength at a lower temperature than 574, 90 vs 120 degree Celsius, but retained a bit higher strength at 150 degree C or higher
2. 574 cures faster than 518 as ambient temperature increases and may leave less time to torque the bolts
3. heat aging looks similar for both after 400 hours
4. 574 has higher lap shear strength but lower compressive shear and tensile strength
So, your choice. But 518 will be easier to handle if you work in a hot environment.
BTW, John Walker seems to be using the Dirko with good results.