Diagnosing a Leaking Lower Intake Manifold Gasket on my Jeep JK Wrangler

NOTE: I'm shifting my Auto and Home DIY videos to my 2nd channel, Carbon's DIY Garage. Please subscribe to that channel to keep up with all my videos!
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Having recently replaced my upper oil pan gasket and both my valve cover gaskets just two months ago, with no leaks showing, I was really surprised to see a small oil puddle under my Jeep again, near the driver’s side tire. In this video I explain what I ruled out to eventually zero in on the lower intake manifold gasket.

Note that in the video I say that the streaks on the motor that I was seeing was oil – it turns out it was really oil combined with coolant since both were leaking from the gasket. The oil-infused coolant, once it dried, left those brownish trails or streaks.

My troubleshooting first ruled out leaking oil from the oil pan gasket and valve covers.

Then I realized oil drops had formed on a place I’d never seen them before – on the bottom of the driver’s side motor mount.

This led me to see that there were brown streaks on the side of the motor (dried oil + coolant).

I followed those up into the engine compartment and realized it was a leaking fluid in a crevice you can barely see between the a/c compressor and the alternator. Having fluid there is really confusing until you realize that if it WAS the lower manifold gasket, it would leak out (towards the front of the Jeep) and then gravity would pull it down into that crevice.

Shooting a light into the gap under the thermostat revealed the glint of liquid. I then realized my coolant tank level had dropped over time. Since coolant and oil both flow through that gasket, it seemed to make sense that it might be the gasket.

I took the Jeep to the local Jeep shop (shout out to Jeep Slop Shop – www.jeepslopshop.com) and they came to the same conclusion. About a week after replacing the gasket, no more drips and the front of the engine is dry.

Hopefully this helps troubleshoot a cause of weird oil drips or help people confirm that their lower intake manifold gasket might be leaking.

Video on replacing Oil Pan gasket: https://youtu.be/KD5ndozT3hI
Video on replacing Valve Cover gaskets: https://youtu.be/-uvTyopES4I
Replacing my Jeep’s thermostat and housing: https://youtu.be/HvCIdHqTla4
Replacing my Jeep’s radiator: https://youtu.be/EbuAkXCB_CY

Please like and feel free to leave comments or questions below!

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NOTE: I'm shifting my Auto and Home DIY videos to my 2nd channel, Carbon's DIY Garage. Please subscribe to that channel to keep up with all my videos!
https://www.youtube.com/channel/UC9FK2dwX5ITkRySaGVjnEbg

Disclaimers:
This video is NOT sponsored by any of the brands mentioned throughout this video or video description. All thoughts mentioned are my own. Some links provided are affiliate links. They do not cost you anything, but I make a small percentage from the sale. Honesty is key on my channel, thank you for supporting me!

I am a Do It Yourself, also known as DIY, mechanic. I am NOT a professional mechanic. I do not have any formal training in the automotive field. I assume no liability for anything you choose to do to your car/vehicle or equipment before or after watching one of my videos. All DIY repairs or modifications you perform are made at your own risk. Sometimes, even if you've done everything the right way, you can destroy or damage one or more things on your car or equipment. You must understand this, but by leveraging knowledge and patience, the probability of encountering one or more problems can be reduced.

Also, if for some unfortunate reason, I do give incorrect instructions and something breaks because you followed my instructions, I will NOT reimburse or pay in any way for whatever cost that may be incurred due to following my wrong instructions.
Lastly, please don't do anything to your vehicle or equipment unless you yourself feel comfortable and confident in doing so.

Видео Diagnosing a Leaking Lower Intake Manifold Gasket on my Jeep JK Wrangler канала Ed Van Cise