I am working on a 1969 Mustang with a 302 and while we were installing a new intake manifold a clamp fell into the distributor shaft. We opened up the front of the engine (just behind the fan) and found the clamp. Now that we have it reassembled there is a slight leak, seems like a mixture of oil and water. It happens after the car has been running for a while. What would be a good sealant? I'm not to knowledgeable about vehicles so I'm kinda lost.