Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
2012 Yukon Denali 97k miles. Been chasing an oil leak for a few years that I thought my previous mechanic took care of. Noticed a good amount of oil drips at my last oil change. Got back under today after changing spark plugs/wires & noticed it seems to be coming from the oil
The one on the plug is probably the valve cover. Which side of the engine is that one on?
Pretty easy if it’s the vc, just remove the coil pack and there’s (4) 8 mm nuts that hold the vc on. It uses a rubber o-ring for a gasket. That location is also directly below the oil pressure sensor which is also known to leak however that usually runs down the backside of the engine and can be confused with a rear main seal leak. That one is a bit harder, you have to do it by feel unless you pull the intake manifold. I would try the valve cover gasket first. Also, there may be an updated driver side valve cover for your engine to help with oil consumption due to the pcv system. I’m not sure of the part number but there here have that info.
