H3 Fyi

[USMC_TOP]

If your I5 H3 ever suddenly starts leaking oil profusely, check the vent tube that goes from the Vortex air box to the valve cover. It allows the engine to breath and the gasses are drawn into combustion. If the tube is real soft like mine was it can collapse while driving and over pressurize the crank case pushing your oil out of its weakest point. I just had it happen. I replaced the tube $20 from GM no more leaks....... just wanted to share in case this happens to you


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[woodwardsh3]

Thanks I will check mine out, no leaks but I will check it.

 

[USMC_TOP]

The tube should be firm like a HD rubber gas line. Not soft like a 1970s vacuum line like mine was and it was cracking too


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[alrock]

The sad downside to that tube working well is that oil is being pushed into the air chamber, through the throttle body and burned up. I smell it whenever the truck is under a load, like when climbing steep hills or even downshifting to pass on the highway.

But you're right on target - that hose wears out and needs replacement. https://smile.amazon.com/ACDelco-15...06626&sr=8-1&keywords=hummer+h3+breather+hose

 

[High Five H2]

where are you seeing the puddle of oil? I have an oil leak that's pretty bad. I just noticed it last night. I think it's dripping onto the front right (passenger side) CV shaft close to where it connects to the front differential. i wonder if it's the same thing.

 

[USMC_TOP]

Mine pushed oil out of the passenger side never really found where. If that tube is soft it's junk. Replace it power wash the oil off your engine and test it out. I was lucky that's all it was


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[USMC_TOP]

where are you seeing the puddle of oil? I have an oil leak that's pretty bad. I just noticed it last night. I think it's dripping onto the front right (passenger side) CV shaft close to where it connects to the front differential. i wonder if it's the same thing.

It ended up down where yours is but it started somewhere up high near the valve cover gasket and the valve timing thing that sticks out of the passenger side of the head


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[Hayden]

I will be sure to try this i lost a good amt of oil last oil change and hunted and hunted for the problem. I know my line needs a replacement