Toyota Valve Cover Gasket
The valve covers are at the top of the engine. When the valve cover gaskets leak, they leak engine oil that tends to drip down onto everything below them, including the exhaust manifolds.
I’ve never seen a fire start as a result of oil dripping on the exhaust manifold, but I’m supposing it’s possible if a vehicle were being driven hard enough and if the leak was bad enough.
Because a leaky valve cover gasket drips on everything below, sometimes it’s difficult to know for sure whether those other items are also leaking or not until you’ve fixed the known leak, cleaned everything up, and then re-inspected the engine at some future time.
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