It sounds like a couple problems. First, the knock sounds like a rod or main bearing problem which is caused by low oil pressure. The smoke you mentioned coming from near the dipstick tube, is it coming from the dip stick or just around it? Other smoke must be from an oil leak. Do me a favor, with the engine running, remove the oil fill cap on the valve cover. Let me know if there is smoke coming from it or any pressure. Also, let me know if if has an affect on how the engine is running.
Also, the smoke and idle problem make me feel like there is an intake gasket problem. But, the engine knock worries me. If it isn't there when you first start it and comes on later and gets louder, it's an oil pressure problem. Either the oil is thinned from gas or coolant, low, or the pump if faulty. I feel you may need to take it to a dealer for this problem. If it's the pump, it's a major repair and hope it hasn't already caused too much bearing damage.
Wednesday, December 17th, 2008 AT 12:58 PM