Got a mate who has a mk1 Focus RS and he has done a compression test due to a bit of a worry , he got the following readings:

160psi
160psi
160psi
155psi


The pistons and stroke are stock at 8.0:1 i think thats what it is anyone

what are peoples thoughts on this and what should it be , is a 5 psi drop satisfactory ?


Ben

 

i wouldnt worry about the 5psi drop if it where more lioke 25 35 drop i would investigate but that is nothing to worry about

 

Its fine.Put a splash of oil in then re test

 

Get a leak down test done, that will give a better indication of the engines condition.