Excursion 4WD V8-6.0L DSL Turbo VIN P (2004)
IN VENTING FROM THE DEGAS BOTTLE CAP, AND APPEAR SIMILAR TO A LEAKING HEAD GASKET.
a. Install RADKITPLUSA 078-00592 on the degas tank.
b. Regulate shop air to 100 psi (690 kPa) and apply vacuum to cooling system until gauge stops decreasing or 20 inches of vacuum is reached.
Degas bottle coolant level must be set to MIN line with a cold engine to allow sufficient space for vacuum.
c. Hold vacuum and allow vacuum to stabilize (allow 60 seconds for vacuum to stabilize).
(1) If vacuum holds steady over 15 minutes go to Step 5.
(2) If vacuum does not hold steady over 15 minutes go to Step 4.
4. EGR Cooler Leak Test Off Vehicle:
a. Remove the EGR cooler from the engine following Workshop Manual (WSM), Section 303-08.
b. Install cooler block-off tools and pressurize the EGR cooler to 30 psi (207 kPa). Fasten the inlet and outlet port block-off plates using standard
bolts, nuts and washers. (Figure 2)
NOTE
FOR VERY SMALL LEAKS, IT MAY BE REQUIRED THAT EGR COOLER REMAIN SUBMERGED FOR UP TO 15 MINUTES TO AID IN
LEAK IDENTIFICATION. THIS TIME IS NEEDED TO ALLOW SMALL LEAKS TO DISPLACE ENOUGH WATER FROM THE COOLANT
PASSAGES TO BECOME EVIDENT.
