hi,
I just replaced the clutch and head gskt in my 1990 civic 1.6 compression is 150psi on all.but it still smokes bad.Used to smoke a bit on accel but now at idle and basically it is a bug repellant.
also replaced 1 exh valve.[:@] any ideas.

 

smoke? what color? bluish is usually rings, but your compression numbers are good..... hmm, yea, what color?

 

could be valve stem seals!!!

 

then the smoke would be dark, and possibly sticky , yes??

 

9 times out of 10 it's the rings on an EF... burned valve seals are fairly uncommon.

 

i was just throwing it out there as a posibility

 

It is oily smoke and whitish. I changed the valve seals when I did the head. It pushes out a good cloud as you accelerate and just a little puff at idle. However the plugs were fairly dry when I checked them. I was wondering if perhaps the vent hose to intake could be plugged or something and sucking up some oil into the intake and then into the engine

 

my 97 was smoking... so i put some new piston rings in it and its better...try that

 

I removed the hose to the pcv valve and it was plugged solid with oil, dirt and sh**. Cleaned out the pcv and put on new hose. Still smokes a bit but not nearly as bad. Probably needs rings but wet and dry compression showed 140-150 for all cyl.
Will try running it for a while as I am selling it and don't want to put any more into it. Have replaced upper and lower control arms (and ball joints) both sides as well as cv shafts, brakes, block heater, starter, brakes and clutch. Have bought a 1996 Nissan 240 SX so don't need the Honda anymore.

 

If the wet and dry compression is good for all cylinders, then the pistons rings should be good. It could be wear and tear on the piston rings. If you are going to change the pistons rings, your better off rebuilding the engine, maybe do some high performance internals while your at it.