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When To Check Underneath Your Car

  • Writer: Chassis Clean
    Chassis Clean
  • Jan 7
  • 2 min read
After Heavy Rain or Snow

Moisture finds its way into every seam, weld, and chassis cavity.


If drains are blocked or coatings are cracked, water can sit for weeks — starting hidden rust.

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After long spells of rain or snow, a quick rinse and underside check can stop small issues from spreading quietly underneath.

Salted water and mud also creep into bolt heads, clips, and seams — spots that go untouched until they fail years later.

For heavier build-up or trapped moisture, a professional clean can strip, dry, and re-protect before rust sets in.

When Buying a Used Car

A spotless body doesn’t mean a clean underside.


We often see cars with freshly painted underseal hiding years of corrosion.


Before you buy, check subframes, suspension mounts, and sills — or get a professional inspection.


It’s a 10-minute job that could save you thousands later.


If you’re unsure, ask for underside photos or an inspection report — transparency now prevents regret later.


We also sell used cars ourselves — so we know exactly what to look for underneath.

BEFORE Winter Grit

Once the gritters hit the roads, your car’s underside is under attack.


Road salt clings to metal and keeps moisture trapped, even when it looks dry.


By checking and cleaning before winter, you give protective coatings a fighting chance — instead of sealing the salt in.


A pre-winter inspection is one of the easiest ways to avoid future corrosion and repair bills.


Even a light layer of salt left sitting for weeks can start the rusting process — it only takes one bad winter to do lasting damage.

After Off-Road Driving

Mud, gravel, and salt spray get packed into arches, crossmembers, and undertrays.​


Once it dries, it traps moisture against bare metal — a 4x4’s worst enemy.


After every trail run, give it a rinse or schedule a proper clean to keep your protection doing its job.


A single off-road weekend can undo months of protection work if the build-up isn’t removed.

Check. Clean. Protect

​If you’re not sure what you’re looking for — that’s where we come in.


We offer free underbody inspections and can show you exactly what’s going on underneath.


A quick visit could catch problems early, before they spread into costly rust repair.


 
 
 

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Free Underbody Inspection

Bring your vehicle to our Blantyre workshop for a free, no-obligation inspection.
We’ll put your car on the ramps, carry out a detailed check, and recommend the best underbody cleaning and protection options for your needs.

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