Why Is My Radiator Cap Leaking Coolant in Suzuki Bolan?

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Why Is My Radiator Cap Leaking Coolant in Suzuki Bolan?

Coolant is often seen around the radiator cap area after a drive. I suspect the cap is leaking o r can’t hold pressure. How important is the radiator cap in maintaining coolant pressure, and can a faulty cap cause coolant loss o r overheating in a Suzuki Bolan?

Gari Specialist asked on 11 Apr 2025 13:06:17 pm

1 Answer

23 views |

Gari Master - on 11 Apr 2025 13:14:13 pm

A faulty radiator cap is one of the most overlooked causes of coolant loss and overheating. The cap is designed to maintain a certain pressure in the system. If it’s not sealing properly:

It allows coolant to boil and escape through the overflow.

You may see wetness o r staining around the cap area.

It causes the cooling system to lose pressure, reducing the boiling point of coolant.

In Pakistan, many Bolan vans still use old o r low-quality radiator caps. Replacing it with a genuine, pressure-rated cap usually 0.9 bar for Bolan is a cheap but effective fix.