Al and son Posted September 16, 2018 Share Posted September 16, 2018 Trying to figure out what this port is for? Coolant comes out of it sometimes. Looks like it is screwed right into the block. It makes a mess on the right side under the cab. Runs down the transmission. I'm pretty sure its coolant. Would think it would stink of fuel if that was it, and the oil really doesn't go down at all. The picture is up side down. Its on the right side of the block. Quote Link to comment https://www.bigmacktrucks.com/topic/54292-mystery-leak/ Share on other sites More sharing options...
880joe Posted September 16, 2018 Share Posted September 16, 2018 I believe that is just a drain port to drain the water out of the block Quote Link to comment https://www.bigmacktrucks.com/topic/54292-mystery-leak/#findComment-406128 Share on other sites More sharing options...
Al and son Posted September 16, 2018 Author Share Posted September 16, 2018 Is there a valve somewhere? Quote Link to comment https://www.bigmacktrucks.com/topic/54292-mystery-leak/#findComment-406129 Share on other sites More sharing options...
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