Ok so I've installed my DISA intake manifold yesterday by following this great write-up made by Stig ! It took me about 2hrs in total and job can be easily done by anybody with minimal mechanical skills.
Now, in my old intake manifold I've noticed an important quantity of oil !!
I would like to know if it is normal or there is problem somewhere....
Here is the oil quantity that went down after my intake manifold was sitting on the floor for 30min....
