Well in your case, and speaking from experience of doing quite a few, I'd remove them in situ.Merlot Machine said:Hello both - actually I haven't removed either of the left hand threaded torx, exhaust or intake side. The X8R guidance video says that you don't need to remove them prior to getting the vanos unit off. A couple of YouTubers make reference to this too so I thought I'd leave them until the unit is off, given how difficult access is with the cross member.
I'll be honest, I've never watched the video and always removed them first. Wasn't even aware you could do it another way.Merlot Machine said:Cheers - I'll give it a go!
Not really relevant to the discussion I know, but I'm pretty certain the oil pressure only pushes the pistons in. The rotational effect of the helical gear pushes them back out when the solenoids close the shuttle valves.Joez4 said:The instructions I got from x8r say you have to remove them, to be honest I cannot see how you can remove the vanos without removing them bolts, they bolt the vanos pistons to those helical gears that rotate when pushed and adjust the cam shafts, its my understanding that the oil pressure pushes the pistons from either side to rotate those helical gears to either advance or retard timing so therefore they need to be bolted together, but I could be wrong as you say the intake one was loose without the bolt removed
Joez4 said:The instructions I got from x8r say you have to remove them, to be honest I cannot see how you can remove the vanos without removing them bolts, they bolt the vanos pistons to those helical gears that rotate when pushed and adjust the cam shafts, its my understanding that the oil pressure pushes the pistons from either side to rotate those helical gears to either advance or retard timing so therefore they need to be bolted together, but I could be wrong as you say the intake one was loose without the bolt removed
Joez4 said:I think the removal afterwards indicates if you snap the fragile left hand thread bolts, probably not that difficult on an e46 but on our e85s I think that would be an absolute nightmare
Joez4 said:Yeah e46 videos make me envious too lol,
I do recommend 50s kid e46 vanos rebuild video tho, very informative