What You'll Learn
Aussie Conditions
Look, we've all been there, a weekend at Fraser or Robe, and you come back with sand in places you didn't know existed. Most blokes just give it a quick squirt at the local servo and call it a day, but that's how you end up with chassis rot within three years. This guide is for the 4WDers who actually want to keep their cars for a decade. I'm going to walk you through my personal process for a total salt-extraction washdown.
Why a Quick Hose-Down Isn't Enough
The Gear You Actually Need
What You'll Need
The Pre-Wash Prep
Let the engine cool
Never spray cold water on a hot engine or brake rotors. Give it at least 45 minutes after you get home. You don't want to warp your rotors or crack a manifold.
Remove all floor mats
Sand gets everywhere. Chuck the mats out on the driveway. If they're rubber, they're getting scrubbed. If they're carpet, they need a serious vacuum.
Open the bonnet and check for 'travellers'
Check for clumps of dried seaweed or spinifex grass that might have sucked into the radiator or around the exhaust. They're fire hazards.
Lower the spare tyre
If your spare is under the tray, drop it down. The top of the spare tyre is the number one spot for salt and sand to collect and rot the floor pan.
Seal up your air intake
If you've got a snorkel with a rear-facing head, you're usually fine, but if not, just be mindful of where you're pointing the pressure washer.
While you're here...
The Deep Clean: Step-by-Step
The Dry Sand Shake
Before adding water, use a soft brush or compressed air to knock off as much loose, dry sand as possible from the door sills and engine bay. Adding water to dry sand just makes mud.
Heavy Underbody Rinse
Use your water broom or pressure washer to flush the chassis rails. Spend at least 15 minutes just on the underside. Keep going until the water running out is crystal clear.
Salt Neutraliser Application
Mix your salt neutraliser (like Salt-Away) in a dispenser and spray it over the entire underbody, suspension, and inside the chassis holes. Let it sit for 5-10 mins (don't let it dry).
Chassis Rail Internal Flush
Stick the hose/pressure wand into the drainage holes of the chassis. You'll be amazed at how much sand comes out of a 'clean' looking rail.
Wheel Arch and Suspension Detail
Get right in there. Scrub the coil springs, the control arms, and behind the brake dust shields. Salt loves to sit on top of the fuel tank too.
The Snow Foam Soak
Foam the whole car. This encapsulates the salt on the paint so it doesn't scratch when you go to wash it. Let it dwell for 5 minutes in the shade.
Pressure Rinse Paintwork
Rinse from the top down. Pay special attention to window seals, door handles, and the fuel filler cap area.
Two-Bucket Contact Wash
Use a high-lubricity soap. One bucket with soapy water, one with clean water to rinse your mitt. This is the only way to ensure you aren't rubbing sand into your clear coat.
Engine Bay Cleanse
Lightly mist the engine bay with a diluted degreaser. Use a brush to agitate. Rinse with low pressure only. Avoid the alternator and fuse box.
Glass and Trim Scrub
Salt leaves a white crust on rubber trim. Use a dedicated trim cleaner to get it back to black.
The Final Rinse
One last pass over everything to make sure no soap or salt neutraliser is left behind.
The Big Dry
Use your leaf blower to purge water from every crevice. If you don't, that trapped water (which might still have trace salt) will sit and stew.
Expert Secrets from the Bay
Watch Out
Advanced Protection for the Die-Hards
Post-Clean Maintenance
What Works and What's Rubbish
Common Questions from the Track
Can I just use dish soap to save money?
How long can I wait before washing the car?
Should I wash the car at those beach-side rinse stations?
Is red dust worse than salt?
Does an electronic rust protector replace washing?
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