Engine mount tightening procedure

Post by **prwood** » 30 Oct 2017, 11:54

When I reinstall engine mounts, I typically follow the procedures in the Haynes or AlldataDIY service manuals, which just say to tighten the mounting bolts down to factory spec before starting the engine.

However, I have read a couple of HOWTOs online which also say to start the engine and put the car in gear before fully tightening the mounts, because supposedly it puts the engine and transmission in the optimal position in relation to the mounts, and reduces the amount of vibration through the mounts. Obviously this is done with wheel chocks, E-brake set, and a trusted assistant in the driver's seat, holding down the brake pedal.

Wondering if anyone here uses this procedure, or if you just tighten down the bolts with the car off?

Post by **abscate** » 30 Oct 2017, 14:09

On my clutch job I just followed VIDA and tightened statically.

Mounts on these cars are heavy and well made.

Post by **JRL** » 30 Oct 2017, 14:59

The only one you would do that for is the upper torque mount but I have found that it really doesn't matter.
Just torque them up EVENLY and it's fine.

Post by **jonesg** » 30 Oct 2017, 15:07

I believe preload made sense when I did my control arm but it moves a whole lot more than an engine mount...intentionally by design.