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What are common warning signs that my JDM engine needs attention?

Key warning signs: blue smoke on startup (worn valve seals), white smoke under load (coolant leak or head gasket), black smoke (rich fuel mixture), oil consumption exceeding 1 qt per 1,000 miles, coolant loss without visible leaks, knocking or tapping sounds, delayed startup, rough idle, or check engine lights. Address promptly to prevent major damage.

Next: plan the move

Found the car. Understand the handover.

Before making promises about collection, coordinate the inspection, paperwork, seller release and transport. Give each part of the purchase its own check.