HIMARKLIF Aluminum Coolant Filler Neck w/ 18lb Stainless Radiator Cap — Cast Aluminum, Fits Dodge/Chrysler/Jeep

HIMARKLIF's upgraded cast aluminum coolant filler neck with an 18lb stainless steel radiator cap provides a more durable, corrosion-resistant replacement for worn plastic necks and factory caps.

If your vehicle shows signs of coolant leakage, cracked plastic filler neck, or a failing radiator cap, this replacement assembly restores a tighter seal and longer life. Designed to match OE fitment for many Dodge, Chrysler and Jeep models, the assembly combines a cast aluminum neck that stands up to heat and aging with a heavy-duty 18-pound stainless steel cap that maintains proper system pressure.

Which vehicles does this filler neck and cap fit?

This HIMARKLIF assembly is engineered to replace specific part numbers and fit a range of older Dodge, Chrysler and Jeep models. Always confirm fitment against your vehicle's year and OEM part numbers before purchase.

• Chrysler 200 (2011–2014), Chrysler Sebring (2007–2010)
• Dodge Caliber (2007–2012), Avenger (2008–2012), Durango (2000–2003), Dakota (2000–2004), Journey (2009–2018)
• Jeep Compass and Patriot (2007–2017)
• Replaces reservoir cap 55116901AA and filler neck numbers including 52029199AA, 52028810AL, 52029193AF/AJ/AK, 52029195AK

How does the aluminum construction help compared with the original plastic neck?

Cast aluminum resists heat-related warping, UV degradation and long-term embrittlement better than molded plastic. That means fewer leaks and a longer service life in demanding engine bay conditions.

• Superior corrosion resistance over time
• Improved structural strength under heat cycles
• Less chance of cracking or failure from vibration and age

What are the features of the 18lb stainless steel radiator cap?

The included cap is made from high-grade stainless steel with a durable spring and pressure-rated bonnet. It opens at a set pressure to protect the cooling system while resisting corrosion that commonly affects stock caps.

• Rated 18 pounds for consistent pressure control
• Stainless steel construction for long-term durability
• Fatigue-resistant spring for reliable operation over many cycles

Is installation difficult and what hardware is included?

Installation is straightforward for DIY mechanics with basic tools. The filler neck uses a screw-in bracket attachment and comes with two upper hose clamps so you can secure the hose quickly and correctly.

• Screw-in mounting for a secure bracket attachment
• Two hose clamps included for proper sealing
• No specialized tools required for most installations

Who is this product for: This HIMARKLIF aluminum filler neck and 18lb cap is intended for owners of compatible Dodge, Chrysler and Jeep models who want a durable replacement for aging plastic necks or corroded caps. It’s a good choice for do-it-yourselfers restoring cooling-system reliability, fleet-maintenance teams seeking longer-lasting parts, and anyone who prefers a metal upgrade to reduce recurring coolant leaks. Always verify part numbers and vehicle compatibility before ordering to ensure correct fit and function.