Just because you had the heads tested does not mean it fixes everything. Engine blocks crack to. drain anti freeze fluch with water and put in K&N block sealer. DO NOT USE WITH ANTI FREEZE IN IT, IT MIXES AND TURNS TO JELLO. WAIT SEVERAL DAYS AFTER THEN REPLACE ANTI FREEZE. AFTER YOU FLUSH ENGINE AGAIN. SHOULD FIX PROBLEM!
on the front of a 4 cylider engine
First you have to remove the intake, which includes the fuel rail and injectors. Valve cover, and there are the bolts for the head. Drain the coolant. If you do a valve job, do both heads.
None
Two.
Cylinders have 2 faces
120
a cylider deffinatly
Look for an obvious coolant leak. If you don't see one, pull the engine oil dipstick and examine the oil. If the oil is milky you probably have a blown head gasket. Do not continue to drive it.
1-3-4-2
If it is already a gas, it does not need to evaporate.
It could leak from either end.
It will be on the bottom of the hand butt, or inside the cylider crane area.