5.4 Mod Motor - oil leak in valley - 460 Ford Forum
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post #1 of 5 (permalink) Old 11-11-2008, 09:14 PM Thread Starter
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5.4 Mod Motor - oil leak in valley

Tonight I took a quick look at a slight oil leak on my daughter's Expedition with a 5.4 engine. It is a very slight nuisance type leak with only a few drops on the garage floor.
I noticed a small amount of oil in the block valley.
I will do more investigating later, but wonder if anyone on the site has experienced a 5.4 with this condition?
I am sure when I pull off the shrouding and covers from the top of the engine, it may be more apparent. I just haven't fooled with this engine family that much. The 4.6 in my 97 Lincoln MKVIII has over 175,000 of no problem miles. ( watch it blow up in the morning, since I said that...)
Any ideas?
Thanks,
Keith
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post #2 of 5 (permalink) Old 11-11-2008, 09:29 PM
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I had worked for Ford at one time we had a Navigator come in with a oil leak.. It was the head gasket.. I went ahead and did some reasearch for you and here are the TSB's..

TSB's for 2003 4WD Expedition V8-330 5.4L SOHC VIN E SFI & VIN L SFI

--------------------------------------------------------------------------------

02-25-7 -- DEC 02 -- Drivetrain - Front Drive Axle Groaning/Humming Noise
02-23-7 -- NOV 02 -- Cooling System - Premium Gold Coolant Service Info
02-22-7 -- NOV 02 -- Engine - Cylinder Head Gasket Oil Leak
02-21-1 -- OCT 02 -- A/T - Torque Converter Access Plug Dislodges
02-21-13 -- OCT 02 -- Engine - Cylinder Head Straightedge Surface Check
02-20-8 -- OCT 02 -- A/C System - Diagnosis and Service Tips
02-17-6 -- SEP 02 -- A/T - Inadvertent Shift Interlock Disabling
02-16-4 -- AUG 02 -- Audio System - Whining/Buzzing Noise From Speakers
post #3 of 5 (permalink) Old 11-11-2008, 09:33 PM
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Jon might be able to fill in the facts on the 4.6 in a 97 Lincoln MKVIII..

Not sure if you have the Cast Aluminum/ Plastic Intake Manifold? Intake gaskets like to leak.. Put's coolant in the #1 cly..
 
post #4 of 5 (permalink) Old 11-12-2008, 06:29 AM
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the pass side head was the culprit for most hard to find oil leaks.theres nothing that has oil going through it in the valley of the mod motor.or its brown coolant,then its the coolant tube right under the intake.
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post #5 of 5 (permalink) Old 11-12-2008, 06:44 AM Thread Starter
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Leak

Thanks for the input, guys!
I will take a closer look..
Keith
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