2. |
Attach cap to radiator pressure tester. |
3. |
Slowly pump tester and verify that
air is coming from vacuum valve. Push pump at constant speed. |
4. |
Pump tester quickly, about a one second
push, and measure relief valve opening pressure. Compare opening
pressure to pressure listed on cap. Refer to Fig. 1
for cooling system pressure range chart. |
5. |
Remove pressure tester from cap. |
6. |
Fill radiator and overflow to proper
level with coolant. |
7. |
Inspect overflow tube and overflow
bottle for dents, kinks, or internal obstructions. |
8. |
Wipe out inside of filler neck. Inspect
lower inside sealing seat of filler neck for nicks, dirt and solder
bumps. |
9. |
Inspect cams on outside of filler neck.
If cams are bent down or up, seating of pressure cap valve and tester
seal will be affected. If cams are damaged, have filler neck replaced
by a reputable radiator repair service facility. |
10. |
Attach a radiator pressure tester and
rotate tester head until locking ears contact stops on radiator. |
11. |
Operate pump until indicator on gauge
reaches just beyond color band for recommended pressure for vehicle,
Fig. 1. |
12. |
Verify that pressure does not drop.
If pressure drops, inspect hoses, radiator or water pump for leaks.
If no external leaks are found and pressure drops, inspect heater
core, cylinder block and head. |
13. |
Remove tester and install radiator
cap. |
|