BIGTY2009

All,
So I pulled my intake manifold a while back and I didn't drain the coolant before. Im not sure where all the coolant went in the heads. So I finally got everything put back together and before I did anything I drained the oil. There was a good amount of green coolant at the bottom of the oil pan that drained out first. My question is, should I put some cheap o'riellys brand oil in there run it for say 50 miles and change it again to flush out whatever is in the motor. Or do you think I am safe just throwing in some full syn and run it as is. I am at the point of adding new oil so any answers would be appreciated.

Duncan_GT

I wouldnt run it at all with coolant in the oil, even a minimal amount. I would keep the drain plug out, and just pour a couple or three quarts of oil through it to try and get the coolant out. Afterwards, when I'm sure there was none in it, I would run it as you suggested and change the oil again after 50 or so miles

tinman

^^^^^^^^^^^^^^^^^^^THIS^^^^^^^^^^^^^^^^^^^^^^

BIGTY2009

Sounds like a plan. Another question, why would there be a nipple for a hose on an oil fill neck. I picked up some new valve covers and it has just that. Do I run that to somewhere on the carb/intake? Or just leave open?

dawson1112

Also any coolant that went into the heads spilled down into the cylinder.

You want to try to get that coolant out before cranking the engine over , other wise it can hydro lock the engine. You can use the old fashioned way and pull all the plugs and crank the engine over letting the pistons push it all out, or use an air gun to blow each cylinder out. The rest of the coolant got into the sump via the lifter valley drain.

BIGTY2009

As far as blowing out the cylinders with compressed air, do I just pull the plugs and stick the air gun in there?

Duncan_GT

I think you are referring to the line that runs from the oil fill neck to the throttle body. If so, it is used as part of the crankcase evac system (pcv valve)

dawson1112

Yea that's about the only thing you can do short of pulling the heads,

You just want to be sure there is no coolant that is pooled up in the cylinder , youll never get it all out until the engine is fired but , even a half cup of liquid in the cylinder can hydro lock it. It is probly just easier to remove all plugs and crank it over and let the pistons blow it out.