Quote:
Originally Posted by alniki
I presume hylomar or Curil-T can be used in the case web so that we amateurs can torque the through-case bolts without worrying about the sealant hardens too soon. And with the periphery sealed by Threebond 1104 we would not need Loctite 574 any more and there would be oil leaking outside of the case. Feasible?
|
The 574 used on the main webs is not used as a sealant. The case webs are glued together the insure/ increase case stability. The case is in shear at this point and 574 applied properly reduces case movement caused by the shear forces.
Curil T and Hylomar offer no stability hence would be inappropriate applied in this place. We have been building these engine for decades and if we thought we could do the same job with less products we would pursue that option. IMPO, the system I have posted has proven to be the best method .
Although the materials in the spec below are different you can easily infer the improved adhesion.
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
After 24 hours @ 22 °C.
Compressive Shear Strength, ISO 10123:
Steel pins and collars N/mm² ≥6.0LMS
(psi) (≥870)
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² 8.5
(psi) (1,230)
Tensile Strength, ISO 6922:
Steel (grit blasted) N/mm² 5
(psi) (725)