Re: 164 12v: replace hydraulic with mechanical tensioner?
Mechanical (de-)tensioner now fitted, a straight forward install apparently. Just needed to source a 10mm stud and 8mm plug from a local nuts and bolts place as Alfa UK don't recognise the part numbers mentioned on several US web pages (60897506/60897507). In lieu of the 10mm/8mm stud, used a 10mm and drilled the mounting hole on the tensioner rather than turning the 10mm down to 8mm on the stud - seems to be OK.
Time to see now how much (or little) oil I get through now, as i suspect all the losses were through the tensioner. Certainly the extra cost of this mech tensioner over the hydraulic seal kit is much less than I was spending in oil a year!!
I check the oil vapour canister regularly after it blocked a few years ago and this was correctly draining. I have changed the drain hose and an array of other hoses anyway, as they were past their best and some were getting a bit brittle with surface cracks appearing.
One thing I have noticed is the oil pressure remains stable now at any particular number of revs, where before the gauge pointer was a bit nervous particularly at idle. The gauge show just under 4bar at 3k when up to temperature, and a very steady 1.5 bar at idle (approx 800rpm), and oil pressure now rises and falls immediately in line with the revs where it was a tad irratic before (e.g. some lag on revs rising to the gauge rising).
thanks for your advice.
Last edited by dex; 29-10-08 at 17:28.