For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Check for a leaking radiator. Is the radiator leaking? | Go to Step 2 | Go to Step 3
2 | Repair or install new parts as necessary. Is the repair complete? | System OK | --
3 | Check for a leaking heater core. Is the heater core leaking? | Go to Step 2 | Go to Step 4
4 | Check for a faulty surge tank pressure cap. Is the cap operating properly? | Go to Step 5 | Go to Step 2
5 | Check for a leaking coolant recovery hose, a cracked recovery reservoir or a nicked reservoir neck. Is the reservoir or the hose leaking? | Go to Step 2 | Go to Step 6
6 | Check for any loose or damaged hoses and connections. Are any hoses damaged or are any hose connections leaking? | Go to Step 2 | Go to Step 7
7 | Check for a cracked thermostat housing or a leaking thermostat seal. Is the thermostat housing cracked or is there a seal leak? | Go to Step 2 | Go to Step 8
8 | Check for a cracked water pump or a leaking water pump seal. Is the water pump cracked or is there a leaking seal? | Go to Step 2 | Go to Step 9
9 | Check for a leaking auxiliary water pump. Is an auxiliary water pump leaking? | Go to Step 10 | Go to Step 11
10 | Replace the water pump. Is the repair complete? | System OK | Go to Step 11
11 | Check for a leaking cylinder head drain hole plugs. Are any drain hole plugs leaking? | Go to Step 2 | Go to Step 12
12 | Check for a cracked cylinder head. Are either of the cylinder heads cracked? | Go to Step 2 | Go to Step 13
13 | Check for a leaking cylinder head gasket(s). Is the cylinder head gasket leaking? | Go to Step 2 | Go to Step 14
14 | Check for a cracked throttle body or a gasket leak. Is the throttle body cracked or is there a gasket leak? | Go to Step 2 | Go to Step 15
15 | Check for a cracked cylinder block. Is the cylinder block cracked? | Go to Step 2 | Go to Step 16
16 | Check for any porous castings. Are the castings OK? | System OK |