How to Replace Crossover Tubes on a Gas Grill Step by Step

If your main burner ignites quickly but the adjacent burners refuse to catch, learning how to replace crossover tubes on a gas grill will solve the issue. Crossover tubes carry the ignition flame across the firebox so you only have to spark one burner to light the entire cookbox. When these small metal channels corrode or split, lighting secondary burners becomes inconsistent and frustrating.

Per safety standards like ANSI Z21.58 for outdoor cooking gas appliances, carryover channels must reliably transfer flame across all burners within seconds of gas flow. Swapping out a corroded channel takes about thirty minutes with basic hand tools and costs very little. Here is the direct breakdown to get your grill lighting smoothly again.

Quick Answer: How to Replace a Crossover Tube on a Gas Grill

To replace crossover tubes on a gas grill, first disconnect the propane tank. Remove the cooking grates and heat plates to expose the burners. Unfasten the retaining screws or clips holding the burners in place.

Slide out the old crossover tube from between the burner slots. Seat the new tube directly over the carryover ports and reassemble.

What a Crossover Tube Is (and How to Spot Yours)

A crossover tube, also known as a carryover tube, is a small hollow pipe that connects adjacent burner tubes inside your grill firebox. It does not connect directly to the main gas manifold. Instead, it captures a small amount of gas from the primary lit burner, ignites it, and channels that flame over to ignite the next burner in line.

You will typically spot crossover tubes running horizontally across the back or front edges of the main burner array. In larger multi-zone setups, you may see two or three separate crossover tubes linking all the burners together. They usually feature a row of tiny precision-drilled carryover holes along their length.

Because crossover tubes sit directly beneath the cooking surface, grease drippings and salty marinades constantly land on them. Over time, heat and corrosive drippings cause the thin metal to rust, blister, and crack. When the tube loses its structural shape, the flame path breaks down completely.

Bad Crossover Tube or Clogged Burner Ports? The 5-Minute Visual Test

Before buying replacement hardware, inspect the area closely to confirm whether the tube has actually failed. Often, a burner that fails to cross-light is simply blocked by burnt grease or spider nests.

Take off your grates and heat tents, then grab a flashlight to inspect the tube from above and below. Look closely at the small carryover holes along the channel. If the metal is intact but the tiny holes are caked with crust, poke them clear with a straight metal paperclip.

If you poke the tube and the metal flakes away or reveals visible holes, the tube is shot. According to the National Fire Protection Association, unmanaged gas accumulation inside an enclosed grill box creates sudden flare-up risks. Replacing a crumbling tube restores safe and immediate ignition across all cooking zones.

Ordering the Right Replacement: Measurements, OEM vs. Universal Tubes

Getting the right replacement tube requires checking your grill model number or taking precise physical measurements. You can find your grill model on the rating label, which is usually tucked inside the cabinet door or behind the rear frame. Consulting manufacturer documentation and deciphering model plate details ensures you get an exact match for your firebox dimensions.

If the manufacturer no longer makes parts for your grill, universal adjustable crossover tubes are widely available as of 2026. These feature telescoping sections that slide together to bridge different burner distances.

When measuring your old tube for a replacement, record three critical dimensions:

• Total end-to-end length of the tube
• Center-to-center distance between your main burner tubes
• Outer diameter of the tube ends and the mounting bracket style

Material choice matters for longevity. Choose 304-grade stainless steel over cheaper 430 stainless or aluminized steel whenever possible. Grade 304 offers superior resistance to corrosive cooking salts and acids, giving you several extra seasons of reliable ignition.

Replacing a Crossover Tube, Step by Step

Replacing a crossover tube is straightforward once you have clear access to the firebox floor. Set aside roughly 30 minutes for the job and keep a few basic tools nearby. You will need a screwdriver, needle-nose pliers, penetrating oil for rusted screws, and a pair of work gloves.

Prep: Shut Off Gas, Pull the Grates, Photograph Everything

Start by turning all burner control knobs to the off position. Disconnect the propane tank hose or close the manual shutoff valve on your natural gas line. Safety comes first whenever you service outdoor gas hardware.

Lift out the cooking grates and remove the heat shields or flavorizer bars. Set them aside on a piece of cardboard to protect your patio.

Before touching any screws or clips, take two clear photos with your phone. Capture the overall layout and take a close-up photo showing how the crossover tube seats into the burner brackets. These photos will give you an exact visual reference when you put everything back together.

Removing the Burners and the Old Tube

Locate the fasteners holding the main burners to the rear firebox wall. Grills typically secure burners with small cotter pins, R-clips, or stainless machine screws. If the screws are rusted tight, spray them with penetrating oil and let them soak for ten minutes.

Pull the pins or screws out and set them in a small dish. In most popular mid-sized backyard cookers, the crossover tube is held in place by the burners themselves.

Gently lift the back end of each burner up and backward. Slide the front venturi tubes off the brass valve nozzles at the control panel. Once the burners are free, lift the old crossover tube out of its mounting slots.

Take this opportunity to vacuum loose ash and rust debris from the firebox base.

Seating and Aligning the New Tube Over the Carryover Ports

Examine the new crossover tube to identify its top and bottom sides. The row of small flame ports must face upward or outward toward the burner ports, matching your original factory setup.

Slide the ends of the new crossover tube into the mounting brackets or resting notches on the burners. Make sure the carryover ports on the tube line up directly with the carryover holes on the burner walls.

If you are using an adjustable universal tube, adjust the slide mechanism until the length matches your burner spacing exactly. Tighten the small locking screw on the universal tube so it does not shift during cooking vibrations.

Reassembly, Leak Test, and First Light

Lower the burner tubes back into the grill box. Carefully guide the open front venturi necks directly over the brass gas orifices on the control manifold. This step is critical because a misaligned venturi can leak gas inside the cabinet.

Reinstall the rear retaining clips or screws to lock the burners in place. Reconnect the igniter wires if you unplugged them earlier.

Before putting the grates back, reconnect your fuel source. Turn on the main burner and click the igniter to start the flame. Turn on the second burner knob.

Watch the flame jump quickly across the new crossover channel to ignite the next burner within two seconds. Once you confirm smooth cross-ignition across all zones, reinstall your heat plates and grates.

Common Crossover Tube Replacement Mistakes to Avoid

Most failed repairs trace back to a handful of avoidable errors. Here's what trips people up most often.

• Installing the tube upside down. The carryover ports must face the burner's carryover openings. A flipped tube blocks flame transfer completely, and the brand-new part gets blamed for the same old symptom.
• Skipping the orifice reseat. Each burner's venturi must slide fully over its brass orifice. A half-seated venturi leaks gas behind the control panel, which is the top cause of flare-ups after a repair.
• Forgetting the igniter wire. It's easy to unclip the electrode wire and never reconnect it. Then the push-button igniter goes dead and the lighter wand comes out every cookout.
• Skipping the soap test. Mix dish soap with water, brush it on every connection, and watch for bubbles. Two minutes of checking beats a gas leak every time.
• Ignoring clogged burner ports. If the burners themselves are blocked, the new tube can't work miracles. Clean every port with a paperclip while everything's apart.
• Working from memory. This is why we told you to photograph the layout. Reassembly goes twice as fast with reference shots on your phone.

Making the New Tube Last: Grease, Rust, and Storage Habits

Grease is what killed your old tube, so managing drippings is what saves the new one. Empty the grease tray every few cooks, because an overflowing tray splatters grease straight onto the tube below. After each grilling session, run the burners on high for ten minutes, then brush the grates clean.

Give the whole firebox a deep clean each spring. A wire brush and a paperclip will keep the tube's ports and the burner's carryover holes clear. Skip harsh oven cleaner on stainless parts, since mild soap and water protect the 304 finish just fine.

Storage matters just as much. A fitted grill cover is the cheapest longevity upgrade you can buy, because trapped moisture plus old grease equals rust. Coastal growners should wipe stainless parts down occasionally, since salt air accelerates corrosion dramatically.

Before your first cookout on the fresh parts, give them a proper first-light burn to clear away any factory residue. Then recheck the port alignment at the start of every season.

Crossover Tube FAQs

How much does it cost to replace a crossover tube?

Expect $8 to $20 for an OEM part and about the same for a universal adjustable tube. Full burner-and-tube kits run $30 to $60. The job takes 30 to 45 minutes with basic hand tools, so DIY labor costs nothing.

If your totals creep higher, compare them against the cost of a newer grill before ordering.

Can I light a grill without a crossover tube?

Yes, but you'll light each burner by hand. Hold a long match or lighter wand through the match-light hole near the first burner, then open additional burners one at a time. It works fine as a stopgap.

It's not a long-term fix, since manually lit burners waste gas and raise flare-up risk.

How long do crossover tubes last?

Most last two to five seasons, and they often fail before the burners themselves do. Constant grease drippings and moisture corrode the thin metal from below. Coastal salt air and harsh winters can cut that lifespan in half.

Inspect yours every spring before the first cookout of the year.

Is it safe to grill with a rusty crossover tube?

Surface rust is cosmetic and harmless. Flaking metal, visible holes, or split seams are not. A corroded tube transfers flame inconsistently, which lets unburned gas pool inside the firebox.

Replace it, and while you're at it, run your model number through the Consumer Product Safety Commission recall database.

Does a new crossover tube change heat output?

No. The tube only carries flame between burners, so it never touches gas flow or orifice sizing. Your grill's heat output stays exactly the same.

If the output numbers on a spec sheet ever confuse you, our explainer on how burner output is rated clears it up fast.