Join Date: Jan 2005
Re: 159 Sump plug torque setting
Oil change now completed.Ten bolts and six crosshead screws to remove the undertray (two rusted up already!)The sump plug wasn't very tight at all and the old oil very slow to drain through the tiny drain hole.Unlike most Alfa alloy sumps the 159's is not vaned but smooth like the Sud's steel one.The replacement element oil filter is tackled from the top of the engine.After disconnecting a couple of pipes,you can get access to to the filter housing to remove the old element and syphon out the oil residue.It is a bit messy to do.The plastic cap that holds the element needs two O-rings oiling and then it's tightened to 25Nm.
I'd swear the engine is even quieter now and tickover settles at 500r.p.m.I've tightened the 15mm. sump plug to 20Nm and will run the car for a while to double check for leaks before replacing the undertray,which is much heavier and more substantial than the one on my 156.
I took photos but the forum limits the size and won't accept them because they are over 100 kb.
Now the new,clean oil is in I'm really looking forward to regularly using the full power of the engine.I have to say,however,that the old filter element showed no visible sign of metallic detritus.That is one advantage over the spin on/off sealed filter canister,you can see what's held in it before it runs down your arm!Gloves definitely required.......