canuk

Smithjack31 The ticking sound you hear after you shut off engine is probably your exhaust system cooling down and contracting. Bet if you get under the truck after shut down you will hear very distict cracking sounds coming from exhaust components, especially up near front of engine/catalytic converters/heat shields, where things get really hot.

As far as I know the dealer is not prepared to do anything about the transfer case whining on very cold days. I am not very concerned about this as I have heard this cold whining from other 4X4s I've owned. Seems like just gear noise when fluid is very cold and thick. I am positive that the engine knocking is not from a manifold leak. I have heard that before on engines that I have rebuilt and replaced. Whenever I've put a fresh motor in I've had to re-tighten manifold bolts once engine is hot to achieve proper seal between manifold and head. Until this is done there is usually a ticking sound as cylinder firing can be heard through small gap formed between manifold and head as they expand differentially. Try tightening bolts when engine is at operating temperature, if possible. My knocking sound is from within engine or head. The dealer had originally told me the sound was normal for an LX470. I insisted that they compare mine to others and they admitted after trying this that it is definitely louder than normal. I guess I'm just going to have to continue to hound them.

My 2003 lx470 is making a definite knocking sound on cold starts as well. has me very concerned. dealer has changed fan belt, catalytic converters, and lastly tried using synthetic oil. noise is still quite pronounced on cold starts. Also has whirring sound coming from transfer case on cold days. I am sure this is just fluid viscosity. I'm in canada and we get some really cold days. not sure what the dealer will do next for engine knock. They are dummies.