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The 3.4L engine has a common problem which makes the van overheat. The one of two major problems are both cooling related and that is why they fail to do that job and the engine begins to overheat.

One likely problem is that the Intake Manifold Gasket is torn. This is the lesser of the two problems. The second likely problem is that the Head Gasket is torn. This is the bigger problem. Many times, it is easier for the mechanic to just swap your engine with a different one from the scrapyard.

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Q: Why does your 97 Pontiac Transport keep overheating?
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