I have a 1993 mazda protege dx my car blowes blue smoke out the tail pipe its a 1.8 liter ohc does any one have any suggesteds. thankyou

 

Have a cylinder leak-down test performed to determine if you have an issue with the rings; if not then have the head rebuilt otherwise have the motor rebuilt or a used motor put in.

 

hi shipo thanks for the info i did a compression check 1through3 cylinders had 165pounds of compression and 4 had 160

 

While those numbers are all pretty good and close enough to each other to be considered normal, they don't tell you what you need to know. A cylinder leak-down test will tell you if you have a ring issue or not. If you don't then your valve guides are suspect and your head should probably be rebuilt.

 

if you want a quick cheap way to check your piston rings;
get the engine to normal operating temperature
all spark plugs out
test all 4 and write it down (count about 5-6 turns of the crank)
then put a little bit of oil in each cylinder
test all 4 again and let us know what you have



Cheers =]

 

#1 cylinder was 160 and #2 cylinder was 160 and #3 cylinder was 160 and #4 cylinder was 165 dry test. The wet test there was no change.

 

Well if done correct that test just ruled the rings out.

 

if your guides are going on the inlet valves oil will be sucked into the cylinder. just to chuck the out there. =]