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I have a 96 Chevy G10/Express 1500 van with 5.0 engine. In an effort to attempt diagnosing some driveability problems, I removed the dog house/engine cover. Quite quickly, I noticed a puddle/build-up of coolant around the left (facing the engine from the interior) intake manifold area. My initial impression was that the leak is from the intake manifold gaskets. I had the gaskets replaced recently, and, if I am honest, I am concerned about the quality of work provided by the gentlemen. The van is using more coolant than it should be, but not necessarily at an alarming rate. enter image description here

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I have a couple of questions:

  • What is the most likely culprit for the leak pictured?
  • If it is, as I, suspect a leaky intake manifold gasket, could this also cause driveabilty problems (by creating a vacuum leak)?
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    You're probably right about the intake gasket and it could cause a vacuum leak. Have you tried loosening and re-torquing the manifold bolts? – Ben Dec 23 '17 at 15:40
  • @Ben, No I have not. Thanks for the suggestion. Might have to talk to the gentleman who put it on in the first place. I don't think my torque wrench would work for the job (plus I am not sure about accessibility). – KellyM Dec 23 '17 at 15:47
  • Are you aware of the “free” tool loaner program at your local Autozone parts store ? One of the really nice tool sets in their system is a really nice coolant leak detector. You hook up a hand pump to the system, pressurize to 13 psi than look for leaks, safe, with the engine off. You pay a deposit which is 100% refundable when you return the tool. Great way to verify the exact leak location. – zipzit Dec 25 '17 at 16:58

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