what is the capacity of this reservoir bottle?

Assuming to the listed exterior dimensions are correct (7.5x8.25x4.25 inches), the volume is roughly 260 cubic inches. A gallon is 230 cubic inches, so subtracting a few pennies for container thickness and rounded corners, it should still hold near 1 gallon.

What is the distance between the two screw holes at the top?

Mine appears to be 4 inches center to center, but I can see there can be some manufacturing variations (+/- 1/8"). As another reviewer pointed out, the holes are offset towards the outside of the tabs by about 3/16" from the center of each tab.

Does it come with a cap? Photo does not show one.

Mine did in fact come with a vented cap.

What size hose (ID - Inside Diameter) do you use for the fitting at the bottom?

I used the same hose that was in the Lexus since it was in good condition, I don't know the diameter. I just cut of about 1/2" off to make sure of a good fit and contact.

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Dorman 603-001 Universal Fluid Reservoir with Cap

Product ID: 1776614

Details

Brand
Dorman
Exterior Finish
Machined
Item dimensions L x W x H
7.5 x 4.25 x
Material
Plastic
Vehicle Service Type
Car Truck

🔥Thick walls resist heat & vibration

🔧Universal fit for versatile use

🛠️3 mounting holes for flexible install

$85.36

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Description

🚗 Upgrade your ride’s lifeline with Dorman’s universal coolant reservoir—fit, tough, and ready to roll!

FLEXIBLE INSTALLATION - Three mounting holes for seamless fit even in tight spaces
UNIVERSAL COMPATIBILITY - Fits cars, trucks & more—one reservoir to rule them all
TRUSTED AMERICAN QUALITY - Backed by 100+ years of Dorman’s automotive aftermarket expertise and ASE-certified support
COMPLETE READY TO USE KIT - Includes vented cap for optimal pressure control and leak prevention
DURABLE HEAT RESISTANT BUILD - Thick, quality plastic engineered to endure engine heat and vibrations

The Dorman 603-001 Universal Fluid Reservoir is a durable, heat-resistant coolant tank designed for universal fit across cars and trucks. Featuring thick plastic walls, three mounting holes for flexible installation, and a vented cap, it offers a reliable, OE-grade replacement backed by over a century of trusted American automotive expertise and ASE-certified technical support.

Specifications

ASIN	B000E35UV2
Automotive Fit Type	Universal Fit
Best Sellers Rank	#10,239 in Automotive ( See Top 100 in Automotive ) #6 in Automotive Reservoirs
Brand Name	Dorman
Compatible with Vehicle Type	Car, Truck
Customer Reviews	4.5 4.5 out of 5 stars (2,511)
Exterior Finish	Machined
Fit Type	Universal
Fuel Type	Gasoline
Global Trade Identification Number	00019495081272
Included Components	1 Coolant Reservoir, 1 Cap
Item Dimensions	7.5 x 4.25 x 8.25 inches
Item Highlight	Direct-fit OE-grade replacement.
Item Part Number	603-001
Item Type Name	Dorman - FLUID RESERVOIRS
Item Weight	9.6 ounces
Manufacturer	Dorman Products
Manufacturer Part Number	603-001
Manufacturer Warranty Description	Limited Lifetime Warranty
Material Type	Plastic
Model Number	603-001
Number of Items	1
OEM Equivalent Part Number	0
Product Grade	like new
UPC	019495081272
Unit Count	1 Count

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$85.36

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ecuador.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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