my montero definitely has bad valve stem seal i manage to replace one side already but i wanted your opinion guys. it doesnt smoke at start up and sometimes when i stop in a traffic light it doesnt smoke after idling or maybe it does but barely noticeable but sometimes when i stop and shift to parking it starts smoking or sometimes when i shift to revers it smoking too my question is, is that a symptom from bad valve stem seal or could be related to vacuum system... like i said it smokes in does occasions sometimes i love my monty so i would like your opinion since you guys are montero sport owners too thanks