Dale at Prestige Repairing My Variators

M

Michael

Member
We talk about this so much, I thought I'd take a few snaps along the way of Dale fixing my car. Whilst it is apart he's organised for the rocker covers to be repainted. Enjoy the photos...
 

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It changes the relationship between the drive sprocket and the camshaft. Thereby adjusting the valve timing. Only the inlet in this case.
 
Oneball said:
It changes the relationship between the drive sprocket and the camshaft. Thereby adjusting the valve timing. Only the inlet in this case.
Click to expand...
Given that cam chain speed is constant the device on end of (inlet) shaft must change relationship wit ith the shaft it surrounds. Wonder if it changes between two fixed degrees using (switched) oil pressure?
 
rs48635 said:
Given that cam chain speed is constant the device on end of (inlet) shaft must change relationship wit ith the shaft it surrounds. Wonder if it changes between two fixed degrees using (switched) oil pressure?
Click to expand...

That’s how the BMW vanos system works. This is the internals of that.

6747367474
 
Thanks! Just watched YouTube videos to get an idea. One shows factory method to replace timing chain using all the right gear. the other had 'local mechanic' changing a variatior using few specialist tools. Unless mole grips locking the camshaft is special.
 
Locking makes sense...That should be in the Tool thread.
Moleys not the best idea...!!?!
Whacking it with an impact doesnt appeal much either, to my way of thinking..
Course, Ive never had to do one, so what do I know...?!
 
I've seen various methods used to "lock"cams in place. When I did the timing belts on an older Audi, the engine had to be a top-dead-center, and then a cam locking bar bolted in place - pins in the bar engaged holes in the cam shaft. When doing belts on the Ferrari flat-12 engine, I made some nylon blocks which wedged in between the intake and exhaust cam sprockets - worked great. I've also seen some guys use a two vice grips, one clamped down in each cam, with the vice grips in an "X" position and taped together....not crazy about this method.
 
As soon as the world returns to 'normal' the variators will come back from Maserati and the rocker covers from the paint shop. The sharp-eyed amongst you will have spotted just how stingy Maserati is with the paint on these cars. The bodywork hidden by the plastic engine cover isn't fully painted in blue.
 
Michael said:
As soon as the world returns to 'normal' the variators will come back from Maserati and the rocker covers from the paint shop. The sharp-eyed amongst you will have spotted just how stingy Maserati is with the paint on these cars. The bodywork hidden by the plastic engine cover isn't fully painted in blue.
Click to expand...
The lack of paint is a real annoyance to me not just under the bonnet too.
Toyota don't even paint behind bumpers anymore.
Saves so much money on paint you wouldn't believe.
Probably good for the planet too.
 
I don’t see why it’s such a big deal. It’s just for looking at!
The shells are electro dipped pre paint anyway...

What I find a bit silly is stuff like ABS/speed sensor connector blocks, regardless they are IP64 ( or whatever) in the wheel arches...Why they don’t put these electrical things in the engine bay ...it’s right there !.?
 
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