I developed a small coolant leak from the part highlighted in the picture but can't seem to find the name of the part in the FSM, RockAuto or TheZstore's websites. Can anyone help me identify this part and where I might find one?

 

its a valve regulator heres the part number 27188-Q0105 should cost around $11.00 - $15.00

 

Thank you! Is this a part that commonly develops a leak or is a sign of a bigger problem? Just trying to understand if there is anything else I should be looking for while changing this part.

 

over time it will leak.. It's a pressure relief valve that allows a bypass from the lower portion of the thermostat (back of the head) to the pump inlet when the engine is brought up to higher rpms before the engine thermostat is open. your leak can either be from a worn out O ring inside the valve or just corrosion. its funny cuz mine just started leaking a few days ago and im about to order the same part..

 

I just ordered one from Courtesy Nissan at lunch, they didn't have one in stock but said they can have one in and sent out to me on Wednesday. It looks to be a fairly simple repair but is there anything I should be aware of while replacing?

 

not really... but it should be a good time for you to flush your cooling system if you haven't done so yet. i know i will be..

 

I plan to do the same, actually was about to change the plugs and wires when I found the leak as I'm doing a tune-up. Where did you find that part information, I couldn't find anything in the FSM other than the picture?

 

Google is my friend!! lol

 

LOL, yes it is... I was just unsure what the part was even called. Love your car btw, I'm going to resume installing that same body kit once I get this part installed. Got derailed by replacing all the brakes. Any pointers for installing the front portion? I have the side skirts on but the front is giving me a very hard time.