Sierra Sapphire Cosworth No Compression In 3 Cylinders
Hiya all, my boyfriend has a sierra sapphire cosworth and it has no compression in Cylinders 1, 2, 3, but 4 has 60psi he has had a full head rebuild, brand new inlet valves, also a new headgasket & Also when the cams are removed the compression comes back on all 4 but was weak. As soon they go in its gone again etc please help he doesn't know what else to try!!
Last edited by Demi Jehu; May 6, 2015 at 12:16 PM.