What makes you think the reason it smokes is valves?
Toyota had real problems with sludging due to EGR, when it first came out. Is that one of the years? Could that be the issue?
It wasn't the EGR but the crankcase ventilation system. Of course if you changed your oil every 5K you wouldn't have the problem anyway.
It wasn't the EGR but the crankcase ventilation system. Of course if you changed your oil every 5K you wouldn't have the problem anyway.
It was the combination of Toyota (and BMW and others) stretching oil changes to over 5000 mile (7500, I think) and the introducing of EGR, which cooked the oil in the PCV system and plugged them up.