Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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Radiator Cap: Testing and Inspection
Radiator Cap Test 1.
Wait until the engine is cool, then carefully remove the radiator cap (A). Wet the radiator cap, seal with engine coolant, then install it on a commercially available pressure tester (B).
2.
Apply a pressure of 93-123 kPa (0.95-1.25 kgf/cm2, 14-18 psi).
3.
Check for a drop in pressure.
4.
If the pressure drops, replace the cap.
