Well you would probably bend all of the valves if it was a timing issue. You dont usually just bend 1 or two..
CAS would have nothing to do with it.
So ya have these general possibilities
-headgasket (doubt it- usually doesnt fail on ALL cylinders @ once)
-Valve seals (again, doubt it- usually you will drop compression on a cylinder at a time, they usually dont all go out at once.)
-Rings and or pistons (very good possibility when buying used shit if its been detonated and overheated like fuck.)
-Timing belt is off enough to open valves during compression/exhaust stroke. Hopefully its not enough to bend the valves.. (maybe?)
-If he has had head work before he sold it, its possible that the valves were cut wrong etc causing improper seating and no compression
Did he replace the timing belt and drive it or replace it and sell it right away?
I would reccomend doing a leakdown test next. A very easy cheap way to determine if its a head/valve issue.
Check the timing (if you already know how to do it, just ignore me...)
pull the front cover off. there are single dots on the front of each cam gear. make sure the motor is at top dead center by lining up the third mark on the crank pulley (15degreees) with the line on the lower front cover (its located at about 2 o'clock if i remember). once thats lined up and you are on the right stroke, the dots on the cam gears should line up with the hash marks on the metal plate behind the cam gears. If they all line up your timing is all G.
Hope that helps. Sorry for the rambling. damn coffee this morning...
CAS would have nothing to do with it.
So ya have these general possibilities
-headgasket (doubt it- usually doesnt fail on ALL cylinders @ once)
-Valve seals (again, doubt it- usually you will drop compression on a cylinder at a time, they usually dont all go out at once.)
-Rings and or pistons (very good possibility when buying used shit if its been detonated and overheated like fuck.)
-Timing belt is off enough to open valves during compression/exhaust stroke. Hopefully its not enough to bend the valves.. (maybe?)
-If he has had head work before he sold it, its possible that the valves were cut wrong etc causing improper seating and no compression
Did he replace the timing belt and drive it or replace it and sell it right away?
I would reccomend doing a leakdown test next. A very easy cheap way to determine if its a head/valve issue.
Check the timing (if you already know how to do it, just ignore me...)
pull the front cover off. there are single dots on the front of each cam gear. make sure the motor is at top dead center by lining up the third mark on the crank pulley (15degreees) with the line on the lower front cover (its located at about 2 o'clock if i remember). once thats lined up and you are on the right stroke, the dots on the cam gears should line up with the hash marks on the metal plate behind the cam gears. If they all line up your timing is all G.
Hope that helps. Sorry for the rambling. damn coffee this morning...
