Does anyone know what the torque spec is for the PRV head bolts? We had copper gaskets made by Ridgecrest Engineering and we want to tighten at the max reasonable number (if I only kenw what that is )
Thanks for that. This is very similar to the procedure outlined in the 604 manual, so it should be pretty close. We don't angle tighten, so I need to determine what this procedure corresponds to in kg.m. We would really want to tighten to 11 kg.m but we are not sure that the bolts and block threads will take it.3 litre for XM (UFZ/UKZ) per 1996 year Citroen mechanics handbook is given as:
Pre-tighten to 6 m.daN
Slacken
Tighten to 4 m.daN
Angle tighten 180 degrees.
Bolts greased with Molykote G Rapide Plus
There is an order diagram and it shows work in a circle centre outwards.
We would really want to tighten to 11 kg.m but we are not sure that the bolts and block threads will take it.
You need to determine whether your engine has TTY bolts, don't angle torque unless these are new.
demannu, does your document refer to greasing the bolts?
Ahh yes, very good point. It does indeed. It says to apply engine oil to the thread and under the head of the bolt, for all of the listed engines.