03 g35 sedan overheating HELP!
Sounds like you didn't properly fill the coolant system and had a bunch of air trapped in it, went for a drive, overheated and blew the motor.
Start with a compression and leakdown test to make sure it's worth investing time/money into fixing what's wrong.
Follow the FSM steps EXACTLY about how to fill the coolant system on these cars, this isn't an old pickup truck that you just dump in a bunch of coolant and drive off into the sunset worry free.
Does your heater blow hot air? Are your spark plugs wet? Did you open the coolant purge valve?
Drain that blue devil out or you're possibly going to be tearing the dash apart to replace a heater core or radiator. That stuff is designed to work long enough for you to drive to a shop to get the problem fixed, it is NOT a permanent solution.
Start with a compression and leakdown test to make sure it's worth investing time/money into fixing what's wrong.
Follow the FSM steps EXACTLY about how to fill the coolant system on these cars, this isn't an old pickup truck that you just dump in a bunch of coolant and drive off into the sunset worry free.
Does your heater blow hot air? Are your spark plugs wet? Did you open the coolant purge valve?
Drain that blue devil out or you're possibly going to be tearing the dash apart to replace a heater core or radiator. That stuff is designed to work long enough for you to drive to a shop to get the problem fixed, it is NOT a permanent solution.
after using the blue devil it cleared up the smoke and the heater wasn’t blowing before but after it started to blow out hot air a little bit.i opened the coolant purge valve while getting air out earlier and broke it. I’m going to get another one tm but hen I bled the system earlier it still had air in the system so imma try and do it more tm.
BANNED!!!
Joined: May 2017
Posts: 14,837
Likes: 2,497
From: Washington State
Coupe 6MT Premium RAS
Hopefully that "smoke" you were seeing was just coolant steaming out of the radiator. If the heater isn't blowing hot air that's a 100% indicator you have air trapped in the system. Keep the fan on high until you have HOT HOT air coming out of the vents.
I would also drain out the oil into a clean container and inspect it for any milky discoloring, if it looks good pour it back in.
I would also drain out the oil into a clean container and inspect it for any milky discoloring, if it looks good pour it back in.
Registered User
Joined: Aug 2019
Posts: 417
Likes: 81
From: SoCal
04.5 G35 Sedan 5AT
Just had the cats gutted and my car started overheating like crazy. Before I gutted my cats I installed spark plugs, new coil packs, and a thermostat. Also I replaced the left valve gasket. It had a p0300 code and the misfire went way after I gutted my cats.But after the gutted cats it’s been overheating. I get up to about 50mph and the temp gauge will spike up and all of my radiator fluid would be gone or at least low. What do I do??
I've heard that aftermarket ones (*cough* AutoZone *cough*) can break/jam even when brand new. OEM is the only way for me when it comes to thermostats on these cars.
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