engine clater on 2002 Toyota Tundra

i have a 2002 toyota tundra 2wd extended cab 4.7 v8 when the engine is cold i hear ticking sound when i am driving and the trasmission shifts it sounds like a bad spark knock, worse when cold. called toyota mfg. they can't help

Asked by for the 2002 Toyota Tundra
It might just need a simple valve clearance adjustment. Did you ever get it done?
How many miles are in the truck?

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Other appends for this vehicle indicate that the V8 exhaust manifolds are a common failure, and when they fail they tend to make a ticking sound when the engine is cold.