Symptoms
Creeping temperature, a weeping core or a radiator a shop refuses to repair.
The fix, step by step
- Early radiators have horizontal fins and are heavy.
- One IH8MUD seller found the same radiator part number in Toyota books from 1958 to 1962, so FJ25 and early FJ40 radiators match.
- Owners report using Cool Cruisers of Texas radiators without problems, and one says new late-model OEM radiators 'fit right in' if originality isn't the goal.
- The original tanks can also be re-cored.
- Flush the block, fit a new cap and hoses, and check the fan shroud.
Tools & part numbers
- Drain pan
- hose clamps
- new radiator cap
Where to buy the parts
Four-core radiator, FJ40/45 1958–84 (later style; confirm fit)Cruiser Corps ↗Amazon ↗
Radiator cap, OEM 1958–12/74 (054-001A)Specter Off-Road ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Toyota Land Cruiser J20 / J25 (FJ25) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.