Valvetronic Motor removal

C

Chris1981

Member
Hi,

I have a small leak on both valvetronic and rocker cover gaskets so plan on changing them this weekend, was hoping there was somebody on here that's done the valvetronic gasket recently and can give me a few tips! I've watched a few clips of the valvetronic being removed but each have a slightly different approach.

Do I need to unwind the motor to take the tension off the spring before removing the securing bolts?
Do I need to turn the motor to remove it once I have removed the securing bolts

Any pointers would be greatly appreciated.
 
Hi Chris, yes, I've just done this recently. Which rocker cover have you got?
Anyway, in answer to your first question, it's a resounding yes!! You must unwind the motor to take the tension off the gears. A mechanic friend of mine told me he forgot to do it and the motor shot out of the engine bay and chipped the worm gear.
So, follow the service bulletin (don't have it to hand sorry) and unwind the worm gear. Basically, I unwound mine then started to release the mount bolts and made sure that the VT motor felt 'loose' as the bolts were loosened. As you withdraw the VT motor, yes, you will have to 'jiggle' it out a bit. Remove the adjacent coil packs and unclip/push aside the cable loom first. I also replaced the stupid external torx head bolt that holds in the base of the motor with a hex head/allen key bolt. Made it much easier.
Torque values for the main VT bolts are 9Nm, the adjacent torx head machine screws are 4Nm +90deg. I applied hylomar blue before refitting. Seems great stuff.
 
Brilliant, cheers [ref]Z4C_er[/ref]! :thumbsup:

I've got the metal rocker cover so have bought all new bolts for when i re-fit the cover, and the gasket is metal. What's hylomar blue, thread lock?
 
NP! No hylomar blue is a gasket sealing compound that basically never sets. Been used in the Aerospace industry for eons. Did a lot of reading about it and it seems fantastic stuff. It just provides some extra insurance. Just smear it on one of the two surfaces, push them together, pull apart, wait about 15-20 minutes for it to flash off (release the solvents and become tacky), then connect back together.
Also, when you're re-fitting the VT motor, use the allen key to wind the motor back in and engage the gears in conjunction with doing up the bolts - so wind a little, bolt a little, wind a little, bolt a little, etc.
 
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