Coolant Storage Tank Leak Repair Guide
Immediate Action Required
If your coolant storage tank is leaking, stop driving immediately and turn off the engine to prevent overheating. Never attempt repairs on a hot system.
Step-by-Step Repair Process
1. Cooling Down
Let the system cool completely before inspection:
- Wait at least 30 minutes after engine shutdown
- Never open a hot tank - risk of pressurized boiling coolant
- Check temperature by touching the upper radiator hose
2. Leak Inspection
Once cool, identify the leak source:
- Check for cracks in plastic tank (common in corners)
- Inspect all hose connections for looseness
- Examine the pressure cap for damage or wear
Temporary Crack Repair
For small cracks only (emergency fix):
- Clean and dry the area thoroughly
- Use high-temperature epoxy designed for coolant systems
- Follow product instructions precisely
- Remember this is not a permanent solution
3. Hose and Cap Repairs
Common simple fixes:
- Tighten loose hose clamps with a screwdriver
- Replace faulty caps with OEM-approved replacements
- Inspect hose ends for cracks or deterioration
When Replacement is Necessary
Permanent repair often requires tank replacement if:
- Cracks are larger than 1 inch
- Multiple cracks are present
- Plastic shows signs of brittleness or discoloration
Tank Replacement Steps
For complete tank replacement:
- Drain remaining coolant into a clean container
- Disconnect all hoses (label them for reinstallation)
- Remove mounting bolts/screws
- Install new tank with manufacturer specifications
- Refill with recommended coolant type
- Bleed air from system
- Test for leaks after engine restart
Professional Advice: If you're unsure about any step, seek professional help immediately. Ignoring a coolant leak can lead to engine overheating, warped cylinder heads, or complete engine failure - resulting in much costlier repairs than a simple tank replacement.