How to Clean a New Radiator

Beginner 15 min 16 steps 49458 views Rating: 4.1/5 Published: 2026-02-21

Pour 1–2 cups (240–470 mL) of warm distilled water into a cup.. Mix the water with 1–3 US tbsp (15–44 mL) of white vinegar.. Slide new tubing or cooling lines into the valves at the end of the radiator.

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Steps

1

Pour 1–2 cups (240–470 mL) of warm distilled water into a cup.

Step 1

Pour 1–2 cups (240–470 mL) of warm distilled water into a cup.

2

Mix the water with 1–3 US tbsp (15–44 mL) of white vinegar.

Step 2

Mix the water with 1–3 US tbsp (15–44 mL) of white vinegar.

3

Slide new tubing or cooling lines into the valves at the end of the radiator.

Step 3

Slide new tubing or cooling lines into the valves at the end of the radiator.

4

Pour the distilled water into the radiator using a funnel.

Step 4

Pour the distilled water into the radiator using a funnel.

5

Remove the tubes or lines and tighten the caps on the valves.

Step 5

Remove the tubes or lines and tighten the caps on the valves.

6

Shake the radiator firmly for 30-45 seconds.

Step 6

Shake the radiator firmly for 30-45 seconds.

7

Drain the radiator by pouring the water and vinegar into the sink.

Step 7

Drain the radiator by pouring the water and vinegar into the sink.

8

Repeat this process with distilled water and let the radiator air dry.

Step 8

Repeat this process with distilled water and let the radiator air dry.

9

Wipe down the exterior of the cast iron radiator with a dry rag.

Step 9

Wipe down the exterior of the cast iron radiator with a dry rag.

10

Brush in between the pipes with a long wire brush.

Step 10

Brush in between the pipes with a long wire brush.

11

Use a vacuum to lift pull the dirt and dust off of the radiator.

Step 11

Use a vacuum to lift pull the dirt and dust off of the radiator.

12

Scrub any rusty surfaces with steel wool and vinegar.

Step 12

Scrub any rusty surfaces with steel wool and vinegar.

13

Set your radiator down outside in an area you don't mind getting wet.

Step 13

Set your radiator down outside in an area you don't mind getting wet.

14

Spray every surface of the radiator with a coil cleaner.

Step 14

Spray every surface of the radiator with a coil cleaner.

15

Wait 5-10 minutes for the coil cleaner to foam up on the fins.

Step 15

Wait 5-10 minutes for the coil cleaner to foam up on the fins.

16

Wash the radiator down with a hose or pressure washer.

Step 16

Wash the radiator down with a hose or pressure washer.

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