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Engine mount tightening procedure

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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prwood
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prwood

Engine mount tightening procedure

Post by prwood » Mon Oct 30, 2017 11:54 am

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?
Cars I've owned:
- 2015 to current: 2001 Volvo V70 2.4T
- 2007 to 2015: 2002 Subaru Legacy L Wagon
- 2003 to 2016: 2001 Toyota Corolla LE
- 1999 to 2003: 1994 Toyota Camry LE

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abscate
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Re: Engine mount tightening procedure

Post by abscate » Mon Oct 30, 2017 2:09 pm

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

Mounts on these cars are heavy and well made.
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JRL
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Re: Engine mount tightening procedure

Post by JRL » Mon Oct 30, 2017 2:59 pm

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.
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Re: Engine mount tightening procedure

Post by jonesg » Mon Oct 30, 2017 3:07 pm

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.

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