- Joined
- Aug 2, 2000
- Messages
- 11,486
Angle tightening only on the XN6 which has special stretchy torque to yield bolts which are use once only. These are unobtainable expect they are the same as 205 ones I believe! 11 mm thread too. Use 65 ft lbs.Those blocks ain't getting any younger.
We have previously had debate on this forum about head bolt torque, with some saying that the angle tightening method is best. That is to say, doing it up to a certain middling torque, then turning the bolt a certain number of degrees.
From memory, the infallible Haynes manual says 55 ft/lbs torque, which of course is absurd. A local Pug mechanic here used to regularly do them up to 60 or 65, and said that there was no problem doing them up to 70 ft/lbs. And that is what I used to do.
If too much is shaved off the head, the engine is then prone to ping, which is irritating as it sounds metallic. I think that heads started out as 92.5 mm thick and you could take them down to 90 before pinging started, but don't quote me on this. Please somebody correct me if I'm wrong.
Heads can be shaved further but then either an aluminium shim (shaped like a head gasket) is needed (or else two head gaskets, with more torque added, but that's not ideal) . So you are better off with a shim, plus liberal Hylomar squirted on all mating surfaces.