Coolant spraying onto engine bay

Forum for Infiniti M37, M56 M35h Hybrid and Q70 owners.
JucoQ70
Posts: 6
Joined: Sat Mar 30, 2019 11:52 am
Car: 2015 Q70

Post

I’m having an issue that I don’t really know how to fix

I own a 2015 Q70. 84K miles….I check all fluid levels once a month and have been noticing the coolant level decreasing faster than usual. I’ve also noticed what looks like coolant spaying onto the engine bay from the area right around the coolant reservoir. I can’t find where the leak is coming from or where the spray is coming from. Any Ideas!?!!


User avatar
VStar650CL
Technical Expert
Posts: 8296
Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Post

Clean it up and add some UV dye to the coolant, drive it for a few days, then have a look with the magic flashlight and glasses. Dye will show up even the tiniest "vapor leaks" like a sore thumb.

emm3seven
Posts: 67
Joined: Mon Feb 25, 2019 7:48 pm
Car: 2011 Infiniti M37x w/Tech + Touring

Post

I posted a similar issue a while back, 2011 M37 with similar miles.

post6808263.html?hilit=Coolant#p6808263

EdBwoy here in the forums had the same issue as well. I’d start by checking that coolant plug gasket.

kmiles
Posts: 317
Joined: Sun Mar 27, 2011 2:59 pm
Car: 2015 Q70 3.7 AWD - Hermosa Blue
Sold - 2007 M35x

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I have a 2015 Q70 and had the exact same issue a month ago. Tightening up that plug solved the problem. Is there something that you can put on the nylon screw in plug that will keep it from getting loose?


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