Life limit on engine mounts?

[alcladrv]

Is there a life limit on the "Van's standard large cup Dynafocal engine mount" in either hours or years? Do the bolts need to retorqued regularly? It seems like my engine has sagged a little more each year. After 10 years and 1100 hrs., the sag is more noticeable than before.

 

[Toobuilder]

The bolts are torqued against a rigid spacer in between the rubber isolators, so it's unlikely that they will need a retorque unless there was excessive paint between the mounting surfaces.

There are inspection limits on the LORD website which provides acceptable/not acceptable sag.

 

[Jesse]

Are we talking about the welded engine mount or the rubber engine isolators? I assume the latter.

 

[alcladrv]

The engine isolators. Lord-type mounts.

 

[kamikaze]

"Van's standard large cup Dynafocal engine mount" is supposedly LORD brand according to the Van's catalog, so ...

For the LORD mounts, see here for the applicable limits (last page):

http://www.lord.com/Documents/Product Brochures/PB6304_MountsGeneralAviation.pdf