Diagnostics Help – Oil Gunk in Throttle Body (with pics) | Ford Explorer - Ford Ranger Forums - Serious Explorations

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Diagnostics Help – Oil Gunk in Throttle Body (with pics)


Active Member
July 17, 2008
Reaction score
City, State
Jax, FL
Year, Model & Trim Level
'00 Limited
While working on the Ex (2000 Limited 4.0 OHC) to replace the lower thermostat housing, when I removed the Air Duct from the Throttle Body (TB) I noticed a good amount of oil gunk in the TB. When I removed the hoses from the air duct I noticed a little bit of oil on the hose that connects to the engine cover. What could be possible causes for this? Head gasket gone bad or something else?

I know the Ex have a little oil leak. I see a few drops on the floor. I can also smell the oil when driving slow or when stopped.

I am thinking about replacing the lower thermostat housing a'nd taking the Ex to the shop for the oil in the TB a'nd locate the oil leak problem.

Video of leaking Throttle Body: http://www.youtube.com/watch?v=bRxFrF1MO3s

Pics of Throttle Body: http://www.flickr.com/photos/[email protected]/sets/72157633142071714/