I am working on a friends newly acquired DS 90 4T. Thing has zero compression. After racking my brain and checking everything I could, I did a leak down test on it, thing was blowing through the intake. Figured stuck valve, so I proceeded to remove the head. What a PITA! Didn’t think I had to remove the engine to do that simple job, but it’s off nontheless. Intake valve was stuck alright, stuck open because it was bent. :th_smiliefrustrated

I suspect the previous owner attempted to adjust the valves themselves w/o knowing what they were doing. They were both super tight, tight to the point that the intake valve and piston made contact (this is what caused the bend), ex valve seemed to survive luckily. Now to get the valve ordered, but it seems that they are out of stock everywhere. :th_smiliefrustrated:th_smiliefrustrated

Side note, does anyone know where I can download the service manual in .pdf for this thing? Thanks for the assistance.