Parts for your 2004 Toyota Caldina-Exhaust gasket

2004 Toyota Caldina exhaust gasket — what it does and when to replace it

Yes, the 2004 Toyota Caldina uses exhaust gaskets. Toyota’s Electronic Parts Catalogue (EPC) for the T240 series (ZZT241/ZZT246 with 1ZZ‑FE, AZT241 with 1AZ‑FSE, and ST246 GT‑Four with 3S‑GTE) lists multiple exhaust sealing gaskets: a cylinder‑head to exhaust‑manifold gasket, flange or “donut” gaskets between the front pipe and manifold/catalyst, and additional flange gaskets further down the system. The Toyota repair manual procedures for these models also specify replacing disturbed exhaust gaskets and spring bolts when refitting. So it’s definitely a gasketed system, not a gasket‑less slip joint arrangement.

On the Caldina, the exhaust gasket’s job is simple but critical: it seals super‑hot gases so they don’t leak, keeps the O2 sensors reading accurately, protects the cabin from fumes, and helps the engine maintain torque and fuel economy. On turbo ST246 models there are extra sealing points at the turbocharger interfaces, using metal multi‑layer or crush‑type gaskets designed for high heat and boost.

Good practice during servicing is to replace any exhaust gasket that’s been unbolted. The spring‑bolt donut gasket at the front pipe is designed to crush once