Description
Comparison points and tradeoffs
When comparing Dorman 603-001 Coolant Reservoir Bottle, White Universal Fit with other Reservoirs options, use this source-backed detail as the primary discriminator: Product identity: Dorman 603-001 Coolant Reservoir Bottle, White Universal Fit.
Use this second fact to evaluate the tradeoff: Category: Replacement Parts / Body & Trim / Body / Reservoirs. A third point to compare across alternatives is: This convenient universal-fit coolant reservoir is designed for use in a variety of automotive, marine and other applications.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
This convenient universal-fit coolant reservoir is designed for use in a variety of automotive, marine and other applications. Manufactured from quality plastic, the reservoir’s thick walls are engineered to withstand heat and vibration, with three mounting holes for maximum flexibility for installations where space is tight. It comes complete with a vented cap.
Source product highlights
About this item
- Universal design – this coolant reservoir is not vehicle-specific, and is designed for convenient use in a variety of applications where a durable reservoir is needed
- Thick wall construction – manufactured from quality plastic to withstand heat and vibration
- Complete solution – features three mounting holes for installation flexibility, and includes a vented cap
- Trustworthy quality – designed in the United States and backed by more than a century of automotive aftermarket excellence
- Support available – every Dorman part is backed by Dorman’s ASE Blue Seal Certified technical support team




Robert M –
UPDATE 3/28/18:This reservoir has been in my truck now for over a year and is still fine. No leaks, cracks or anything.ORIGINAL:I have a 1975 F250 that needed an overflow bottle so I bought this to add to the engine bay. The bottle ended up fitting perfectly in the left side of the engine bay just below the battery and fit some holes that were already there with no drilling. The plastic is nice and thick and the cap is snug and secure. The inlet barb on the bottom was already open on mine so no need to drill. Also, contrary to what others have written, the cap on mine is vented. There is a little hole in the middle that allows the air to escape. It is a pinhole so if I wanted a closed system I could easily plug it. Glad I found this and I recommend it if you have the room.
Cheeno –
as advertise
Cesar –
Buen deposito
Customer –
works as it should. plastic feels to be sturdy enough to do what it was designed for and last
Dave potter –
Central heating
Chatter Box Grams –
John Deere wanted over $100 for a replacement tank on my older gas 6X4 gator. I did have to install mounting holes, but it was really easy and works great for a fraction of the cost.
Mike –
Great universal coolant reservoir solution. A little on the small side, but does the job. Installed it in my ’73 Dodge D100 truck with a couple self-tapping screws and some washers, and I don’t see any reason that it will ever need to be replaced again.
Troy mattern –
Cost effective and arrived fast, keeps the coolant form ending up on the ground.
Gene Fex –
Mutiple mounting points makes securing easy. Good value, nice product.
jewayne –
perfect fit, thanks
David Kennington –
Worked great for an old piece of equipment.
Howard Beale –
I’m using it for diesel fuel for a parking heater. Extra tank to just turn a petcock valve and let it refill the larger parking heater tank when it is low enough to do that. . Plus I put an inline filter in the line.
Sherry A. Larson –
used on tractor, mounted outside of engine housing . plastic broke down in sun, lasted 6 months