Parts for your 1999 Ford Falcon-Exhaust gasket

1999 Ford Falcon exhaust gasket: what it does and when to replace it

Yes, the 1999 Ford Falcon uses exhaust gaskets. That includes a gasket between the exhaust manifold and the cylinder head, and a sealing ring (donut) at the manifold-to-front pipe flange. This isn’t guesswork—these parts are called out in the Ford AU Series Workshop Manual (exhaust system and engine sections), listed in the Ford Microcat electronic parts catalogue for AU-series Falcons, and supplied in Australian gasket catalogues such as Permaseal/ACL for 4.0L I6 and 5.0L V8 AU models. Gregory’s Workshop Manual for Ford Falcon AU (1998–2002) also specifies renewing the exhaust manifold gasket during removal/refit.

On a 1999 Falcon, the exhaust gasket’s job is simple but crucial: it seals hot exhaust gases so they exit through the system, not out the sides of the manifold or flanges. A healthy seal keeps the note quiet and tidy, protects nearby components from heat and soot, and ensures the oxygen sensor and ECU get clean, accurate readings for fuel control. When the gasket at the head or the donut at the front pipe gets tired, leaks show up as a ticking noise on cold start, a whiff of fumes under the bonnet, black soot traces, or even a slight drop in low-down torque.

As part of regular servicing on a 1999 Ford Falcon, it’s smart to check for leaks at the manifold and the flange. If the heat shields are off, look for soot lines and feel for puffing (carefully, with the engine cold). Any time the manifold is removed, fit a new quality manifold gasket and inspect studs, nuts and the spring-bolt hardware at the front pipe—replace anything stretched, rusty or dodgy. Clean the mating faces, follow the correct tightening sequence, and torque to spec from the workshop manual. A smear of high-temp anti-seize on studs and the right-grade anti-seize on the donut’s hardware helps the next service along. Avoid silicone sealants, they don’t belong on exhaust gasket faces.

Most Falcons of this era respond well to fresh gaskets—quieter operation, cleaner emissions, and fewer annoying rattles. It’s a low-cost bit of preventative maintenance that saves headaches, especially if the car does short trips or tows.

• Common signs it’s time: ticking on cold start, exhaust smell in the cabin, visible soot at joints, or a new drone under load.
• Best practice: replace manifold gasket and donut ring whenever the joint is disturbed, and recheck fasteners after a few heat cycles.

Does a 1999 Ford Falcon actually have an exhaust gasket?
Absolutely. The AU-series Falcon uses a manifold-to-head gasket and a flange (donut) gasket at the front pipe. This is documented in the Ford AU Workshop Manual, the Ford Microcat parts listings, and Australian gasket catalogues (e.g., Permaseal/ACL) covering AU 4.0L I6 and 5.0L V8 models. If the joint is opened, replace the gasket rather than reusing it.

What symptoms point to a blown exhaust gasket on a 1999 Falcon?
Expect a sharp ticking noise on start-up that softens as the engine warms, a faint exhaust smell under the bonnet, black soot marking at the manifold or flange, and a slightly rough idle or lazy low-end response. Left alone, leaks can warp mating faces and cook nearby components.

Can it be driven with a leaking exhaust gasket?
It’ll usually still drive, but it’s not ideal. Exhaust leaks can let fumes into the cabin, skew oxygen sensor readings, and heat-soak wiring or plastic bits. Best to book it in and have the gasket and any tired studs or springs sorted promptly.