Das Ninjabot Posted November 4, 2017 Share Posted November 4, 2017 On the way back home from school last night I realized that my heat had stopped working and my temp gauge was starting to creep north. Oddly enough it was on the same damned stretch of road that I blew my head gasket on last November. Cue lots of cursing and general aggravation as I had just finished 11+ hours of studying for the MPRE that I had to take this morning but I digress. I let off the gas and coast for about 1/2 mile until I came to a stoplight that was red. The coasting got the car from 3/4 hot to it's normal 1/2 way point, at no time did it ever get hotter than 3/4 of the gauge. I turned the car off and wait until the light changes. Light turns green, I restart the car, and boom, full on heat like nothing is wrong. I drove about two miles, make a stop at the store, and then continue the additional mile home. At no time in my trek home after I shut off the car at the light was there any other issue, nor did the heat ever go north of the normal 1/2 way point on the gauge. I took the gf's car to the test this morning and I'll look at the Subie when I get home but this is up there with the odder things I've seen in my wrenching. A buddy suggested it may be the thermostat but I've never seen one act like that. It's a brand new oem one with less than 5k on it, but it could be defective. I did just replace the coolant temp sensor so I was thinking maybe some air got in the system and created a cavitation problem that reared its head until I shut off the car. I'm really hoping that it's something simple and not another head gasket, I used MLS gaskets, copper sealant, and did the work myself (save decking the heads). Anyone have any thoughts on this one? Link to comment Share on other sites More sharing options...
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