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Oil pooling on top of engine

 
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Old 05-13-2019, 11:47 PM
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Default Oil pooling on top of engine

Hi Everyone,

I have an oil leak that is leaving puddles underneath the lower intake manifold and also leaks out onto the top of the transmission. Any ideas? I am hoping for something small like the intake manifold not being torqued right or the valve cover gaskets needing to be replaced. Worst case scenario the knock sensor. I have no codes. Any ideas.
 
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Old 05-14-2019, 10:56 AM
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ddsand, fro mwhat you are describing, it is most likely the valve cover gaskets. Normally they leak into the plug wells. But, there is always the option of it leaking out, on to the engine. I would start there and see what you find at that point. Make sure to tighten the bolts to the valve covers evenly. If you don't, you will get all sorts of oil leaks from the gasket not sitting flat.
 
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Old 05-14-2019, 02:21 PM
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If it's oil it's likely the valve cover gasket, but my guess is given the amount of pooling that it's coolant. That's a pretty dirty part of the engine so any coolant will look like oil quickly. Give it a lick, if it's bitter you have coolant, likely coming from coolant pipe in the area.
 
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Old 05-14-2019, 02:51 PM
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Thanks Thermo and XtypeHI.

I will look at the coolant hose when I am in there. Since I will have to pull the intake manifold to get to the back valve cover gasket. I am not excited about the whole lick the oil idea so I will probably look for other signs. I do have a very small coolant leak I need to track down so this may solve two problems in one afternoon.
 
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Old 05-14-2019, 03:02 PM
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Which side of the engine is it in. If it's the right side (LHD = passenger) right in front of this sensor =




It's coolant coming from the metal hose. There is an o ring (size #17) that shrinks and goes bad leaking coolant. Sometimes is pretty major and easy to see. Other times it's harder to see (and in pic, see reflection of small pool way down) and hard to see remnants of the leak. I seen it after looking all over the place because I could smell hot coolant after a drive.


 
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Old 05-14-2019, 03:19 PM
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Yup! You Nailed It!!! Big puddle underneath the sensor i the top photo. Every time I drive it smells when I stop. I thought it was oil dripping onto the exhaust, but looks like you are are right. Sorry for misleading everyone with the oil comment. Transmission side is just sweating oil not major leaks. Is it the o ring for the metal pipe in the top photo or do I need to dig deeper?
 
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Old 05-14-2019, 03:24 PM
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https://www.jaguarforums.com/forum/x...valley-212120/

And when I found mine, I had to use a long metal rod with some paper towel taped to it to stick down there to see what it was. It was cooked like tree sap. Very sticky, but Brown (orange coolant), but taking a whiff was coolant.
 

Last edited by Dell Gailey; 05-14-2019 at 03:36 PM.
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Old 05-14-2019, 03:49 PM
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xtypeHI, I see you are experienced with this. Dell sent me a link that had you in the chain. That was very helpful. Thank you all. Will let you know when I get it done.
 
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Old 05-15-2019, 07:46 AM
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Glad my experience was helpful! Good luck with the fix.
 
 
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