When coolant gets into a cylinder it will eather keep the plug from firing or the plug will fire and the coolant will become steam (lots of it ) out the tail pipe and will smell sweet. if this is happening it is a head gasket problem.
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Take it back. I doubt the short block is bad, but if the smoke persists beyond a day or two, the cylinder head may need removing to check the fit of the head gasket, and to ensure the passages in the head match the block. Does the exhaust have a sweet smell? That could be coolant burning.
Now it is possible that a little spilled coolant may have collected in the exhaust during the engine swap, and that is why you see white smoke. This should burn off in a day or two. If the smoke persists, and the coolant level is dropping, they need to take it back and fix it, at their expense, at least the labor charge. Toyota may have made production changes during the year on this engine, and that is what needs to be investigated. That, and if the head gasket is correctly fitted.
Check the hoses and clamps going from the reservoir to the radiator and from the radiator to the engine. Make sure they are flexible and in good condition.
Check the reservoir and radiator for leaks.
Replace any parts they may be failing. If no leaks are found proceed to next step.
Check engine oil. If oil has coolant in it you may have a blown head gasket or crack in the head or engine block. Another sign of a coolant leak into the cylinders is white smoke coming from the exhaust after the engine is warmed up.
Mazda rx 8 creates a lot of heat, to fix this you must change out the coolant every 20k miles, with the mazda brand coolant i think its called mazda f22 coolant, the engine stays hot due to the high RPM engine, you may want to check: ignition coils, cat, coolant, and do a compression test.
Generally, white smoke is engine coolant burning. If it only happened for a few seconds, you may have leaked some on the exhaust pipes. I would check the engine oil and coolant levels with the engine cold, and then look for coolant leaks.
You'll need a cooling system pressure tester to put pressure in the system and it will force the coolant out of the area where it's leaking. Water pumps are common as are heater hoses. Sometimes it's really hard to find the leaks. If you've overheated too many times, you may have warped the cylinder head and that will cause a major leak. Look for white residue around the head/block and should point you in a genreal direction.
Typical symptoms of a blown headgasket may include: -bubbles of air coming up into your radiator (remove cap before starting) -leaking radiator -milkshake colored oil -overheating -rough running -coolant or oil running from head -spark plug(s) that have a green tint (if green coolant). -white colored or sweet smelling exhaust, white smoke of your tail pipe, or loosing coolant through your overflow
yes the exhaust has to come down. 6 or 7 bolts no big deal.Didnt your mechanic tell you that? why isnt he replacing the pan for you?Why would you buy a pan from a salvage yard, they are cheap from aftermarket sources, and if it leaks when you are done, tough luck.. turning the ck engine light is not solving anything. your trans has a problem and the sooner its fixed, the less it may cost you.