Re: Oil pressure gauge/sending unit
My oil pressure sender went and it just read low all the time (ie 2 bar max !!!).
It's easy to change, it just screws off. It's positioned behind cylinder number 4 and looks kinda like an egg cup.
Chain tension. Are you sure it's the chain that's rattling then ???
The tensioner is just a pulley on a spring which takes up the slack in the chain. Nothing to break really unless the spring has snapped. To change this, the head will have to come off. You can change the spring by itself by undoing the huge Allen bolt at the back of cylinder number 1. The spring will move the tensioner about 2 inches in total so I think you have another problem (maybe super stretched chain ???) unless of course the tensioner has "stuck" in position. That's unlikely though as it'll be covered in oil.