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Chevrolet Express
Platform: GMT Van

why is there oil inside the throttle body?

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Old Oct 30, 2025 | 3:55 AM
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Default why is there oil inside the throttle body?

Hello,

I am working on my water pump and noticed that there was oil behind the plate. IT was a tiny bit, maybe 3 milliliters.


IT WAS oily inside this thing(like a mist on the walls, and a tiny puddle)





related or un related. Also noticed the bolts around the timing chain cover looked kind of stripped. IS this typical GM FACTORY or does it look more like someone has been messing around in there?




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