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International LoneStar Coolant Reservoirs

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    BESTfit DEF Doser Injector Kit For Cummins Engine Replaces 2121301002

    BESTFIT TRUCK PARTS

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    Diesel Exhuast Fluid Injector Kit By BESTfit Replaces 2121301002 Fits Cummins EngineKeep your DEF system performing reliably with the BESTfit DEF Doser Injector Kit a replacement for Cummins engines...
    29-06070022
    SKU:
    29-06070022
    Product Type:
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    Make:
    Universal Items
    $131.99
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    3 Inch Twist-On Vented Coolant Tank Cap W/ 15 PSI Rating

    3 Inch Twist-On Vented Coolant Tank Cap W/ 15 PSI Rating

    DAYTON / DORMAN

    $15.69
    Heavy Duty Twist-On Vented Coolant Tank CapCracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.*...
    29-070200019
    SKU:
    29-070200019
    Truck Class:
    Heavy Duty
    Make:
    Ford
    Make:
    International
    Product Type:
    Engine Parts
    $15.69
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    Coolant Reservoir Replaces 2591620C91 For International 9000 Series, LoneStar & ProStar

    Coolant Reservoir Replaces 2591620C91 For International 9000 Series, LoneStar & ProStar

    AFTERMARKET

    $187.99
    Plastic Coolant Reservoir For Cummins ISX 15L EnginesOver time coolant reservoirs become susceptible to heat and engine vibration. This coolant reservoir is manufactured and engineered with premium...
    07-070229
    SKU:
    07-070229
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Engine Parts
    $187.99
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Elevate your truck's cooling system with our high-quality International LoneStar Coolant Reservoirs. Designed to replace outdated reservoirs like the 2591620C91, these components keep your International LoneStar truck running efficiently. Featuring a 3-inch twist-on vented cap with a 15 PSI rating, these reservoirs ensure reliable coolant containment and easy maintenance access. Whether replacing an old part or upgrading, our coolant reservoirs offer the durability and performance your truck needs. Enhance your truck's cooling system with the best products in this essential product lineup.

Frequently Asked Questions About International LoneStar Coolant Reservoirs

What does the coolant reservoir do on an International LoneStar?

The coolant reservoir stores extra coolant for your engine's cooling system, allowing coolant to expand and contract as the engine heats up and cools down. It also helps keep air out of the system and makes it easy to visually check your coolant level without opening the radiator cap.

Will an aftermarket coolant reservoir fit my International LoneStar without modification?

Reservoirs listed in this category are designed to match the mounting points, hose connections, and cap style used on International LoneStar models, so they typically install as a direct replacement. Always double check your truck's model year and confirm part fitment details before ordering, since minor design changes can occur across production years.

What material are these coolant reservoirs made from, and how durable are they?

Most coolant reservoirs for the LoneStar are made from durable, translucent or semi-translucent plastic designed to withstand engine heat, pressure, and constant exposure to coolant. The translucent design also makes it easy to monitor fluid levels at a glance.

How do I know if my coolant reservoir needs to be replaced?

Common signs include visible cracks, coolant leaks around the reservoir or its seams, a cap that no longer seals properly, or coolant levels that drop unexpectedly. Discoloration or brittleness in the plastic can also indicate it's time for a replacement before a leak develops.

Is replacing a coolant reservoir something I can do myself?

Yes, in most cases replacing the reservoir is a straightforward job that involves draining or relieving pressure from the cooling system, disconnecting the hoses and cap, unbolting the old reservoir, and installing the new one in its place. If you're unfamiliar with your truck's cooling system layout, consult your service manual or a qualified technician to ensure the job is done safely.


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