i chacked compression and i got 75% compression.
how argent is it that i will do a rebuild ?
thanks

 

on what a 300ex

i dont know the price but you will need at less piston ring kead gasket base gasket

 

Did you do the compression test, at wot?

 

STOP
how many pounds of compresion?
was it done WOT like hondabuster said
if you dont have desired compresion do valve adjustment and re-check
if still not at desired rate place a few tablespoons thick oil down plug hole and re-check
if the psi came up its time for rings

 

my english isnt the best
what do you all mean by "WOT"
?

 

WOT means "wide open throttle"
[img]i/expressions/face-icon-small-wink.gif[/img]

 

sorry to say, but i dunno how the test was done...i didnt was there when they did the test.
thats all the info he gave me..