Whats this hole for?

[kevkev]

Building new engine. Whats this hole for? Drivers side, rear. Its not drilled out.

 

[jawzs2]

Building new engine. Whats this hole for? Drivers side, rear. Its not drilled out.

I'd bet on the optional block heater

EDIT: Looking closer, the one above the small one is for the heater, no idea what the smaller one is for

 

[kevkev]

Would like to know what the smaller ones for too. Thanks for feedback.

 

[18CrewDually]

Deleted.

 

[kevkev]

Thats generally the passenger side by the relucktor.

 

[18CrewDually]

Deleted. See below

 

[18CrewDually]

Ok I got it. I looked it up for a Durango 5.7 and it is for a block heater.

Cylinder Block for 2009 Dodge Durango | EastcoastMoparts

www.eastcoastmoparts.com