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1987 Subaru gl thermostat replacement instructions

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Either idle control valve/sensor, or a vacuum leak. Check all intake bolts for tightness, wiggle all hoses around with the engine running, and listen for a hissing. Try dumping some soapy water on the intake where it joins to the block, and see if it bubbles profusely. If it does, you may have an intake leak at the gasket.

Posted on Aug 03, 2009


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