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Evans Cooling Prep Fluid 3.78L (1 Gallon) (4), image 1

Evans

Evans Cooling Prep Fluid 3.78L (1 Gallon) (4)

CoolantSKU EV-EC42001

Cheapest we found

$78.95

at XPERT Moto Gear

$78.95 lowest$89.95 highest

3 recent in-stock prices · spread $11.00 (14%)

Based only on in-stock prices checked in the last 30 days. 3 stores checked; dates for every store are shown below.

Recorded store prices

Prices we recorded when we last checked each store for this exact variant.

XPERT Moto Gear$78.95CheapestIn stockSuperbike Supply$79.95In stockROADstore$89.95In stock

Product details

EVANS PREP FLUID

Conversion fluid for an all engine flush

Evans Prep Fluid is a waterless cooling system flush engineered specifically to purge the cooling system of water-based antifreeze after draining and before installing new waterless coolant. Prep Fluid should be used when block drains are unavailable or cannot be removed. It is not a substitute for thoroughly draining the cooling system and related components. Prep Fluid is NOT intended to be a stand-alone operating coolant, but as a flush only.

Engine Types

For use with all engines being converted to any Evans waterless coolant, after draining 50-50 coolant from the cooling system.

Usage

Evans Prep Fluid is ready to use—no water required.

  • Hygroscopically absorbs water
  • Ensures all residual water is removed from the system
  • Ensures that Evans coolants will meet the water content limits and provide peak performance
  • Protects cooling system metals during flush

Instructions:
1. Remove drain bolt, followed by the radiator cap and allow coolant to
completely drain.
2. Blow high volume air through the cooling system to remove any
remaining water-based coolant.
3. Install drain bolt and fill system with Prep Fluid to flush the system.
4. Run the engine until it reaches operating temperature to circulate
the Prep Fluid.
5. Repeat steps 1 & 2.
6. Fill the cooling system with Evans Powersport Coolant and run
engine again until it reaches operating temperature.
7. Take a sample of coolant from the system and test for water that
may remain in the system. Measure the water content using the
Evans Analog Refractometer (Part #: EV-E2196).

Price history

Recorded changes for this exact variant.

Step chart of dated store-price observations. Solid lines show confirmed crawl coverage, dashed lines show overdue missed-check spans, and every line stops at the last confirmed price.

  1. 1XPERT Moto Gear3 points · last checked 22 Aug 2026
  2. 2Superbike Supply1 point · last checked 21 Aug 2026
  3. 3ROADstore1 point · last checked 22 Aug 2026

Solid steps show periods confirmed by the store’s change-only price history and completed crawl record: if the price had changed at a check, another point would appear. Dashed steps show overdue periods with no completed crawl confirmation. Every line stops at that listing’s last confirmed check and is never extended to today. Prices are not live and may have changed since the last point shown.

How we collect and compare prices
Cheapest we found: $78.95 · XPERT Moto GearJump to comparison