Please help me identify what this is

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Jillb

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Jillb

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That's an inspection cover, soaked with a fluid leak. I'm actually surprised how dry that crossmember below it is compared to everything else above it.
Thank you, should the round thing have play in it. When I touch it, it moves up and down.
 

Doubeleive

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looks like a possible rear main leak, take that inspection plate cover off and look up in there with a flashlight and tilt mirror and see if the oil is coming from the center of the rear of the engine, if it is dry up in there then the leak is from somewhere else such as the oil pan seal or oil filter adapter plate, valve covers, etc
 

petethepug

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Pretty sure I saw that same picture on a spray on, always wet, underbody protectant spray ad.
 

alvocado

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It could also be the oil pan leaking where it joins the transmission bell housing. There are areas on the two rear corners where RTV is required or the gasket may have failed. I would clean everything up then inspect after a couple of days as it's rather difficult to identify the source with that much oil residue.
 

Geotrash

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Usually where the oil cooler lines mount to the side of the engine/pan above the oil filter (some have a block-off plate there if they don't have an external oil cooler) is the first spot to leak. Rear main leaks are less common than that one. If you pop that cover out and it's dry behind it you know it's probably not area main seal leak.
 

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