i just got done building my boy car agian and we put new rings bearings ect. ect . and we stared it and it runs like a champ ... but the thing that worries me is that its still blowin grey smoke , and i though it would stop after 1 day .. but now its day 4 and still smoking .... is it beacuse the rings hasent seat yet ??? and its still in the 1000 breakin mile..

 

did you check the piston to wall clearance? did you have ring ring gaps? and spaced the ring 180 from each other?

Also if the rings are installed backward this will cause oil to pass the ring and into the chambustion chambler.

 

yes yes did that 180 them also ....im stuck ...i odnno what is causeing it to smoke ...im thinkin is beacuse were still in break in it in ...

 

during the break in period everything is tight, you shouldnt have any blow by to cause it to smoke.

what type of rebuild did you do? re-ring, or complete?

did you check all of the clearances?

 

I forgot to asked if you check valve guide wear and did you replaced the valve seals?

 

replaced all the rings and seals , and on the head we did the valve seals .....do you think runing a test pipe will cuse smoke since ther is on cat. thier ???