[Z06] Z06 Overheating Issues
Thread Starter
Cruising
Joined: Apr 2009
Posts: 13
Likes: 0
From: St. Paul Minnesota
Z06 Overheating Issues
Howdy, my 03 Z has been having progressively worsening overheating issues over the last year.
I first noticed it when it boiled over at an autocross event last summer. It was high 90s' that day and I was running her pretty hard so I figured that was the reason.
But lately she's been overheating regularly if it's hot out at all, including while in motion. On a trip to Colorado last month I was getting almost instant overheating issues whenever driving uphill (happens a lot out there...)and she ended up boiling over twice. Spoiling my dreams of twisty mountain road fun
I currently have her filled up with about 25% coolant, 75% water as it keeps boiling over and I just add distilled water to top off.
Any ideas? Thanks!
I first noticed it when it boiled over at an autocross event last summer. It was high 90s' that day and I was running her pretty hard so I figured that was the reason.
But lately she's been overheating regularly if it's hot out at all, including while in motion. On a trip to Colorado last month I was getting almost instant overheating issues whenever driving uphill (happens a lot out there...)and she ended up boiling over twice. Spoiling my dreams of twisty mountain road fun
I currently have her filled up with about 25% coolant, 75% water as it keeps boiling over and I just add distilled water to top off.
Any ideas? Thanks!
Thread Starter
Cruising
Joined: Apr 2009
Posts: 13
Likes: 0
From: St. Paul Minnesota
Good call, I was thinking it may have something to do with the duct that funnels air in under the car, maybe something got jammed up there. I'll get under it tonight and check it out.
Pro
Joined: Jul 2010
Posts: 621
Likes: 46
From: Canton Georgia
Racer
Joined: Aug 2010
Posts: 469
Likes: 1
From: Heath Texas
You'll be surprised how much crap gets past the front radiator to the back one. I used a cardboard piece in between the radiators, so as to not blow stuff out of the rear radiator to the front. Then, I blow out the front.
Tapered brush can also dislodge the sand and grit. Just be sure to use an up and down motion.
Tapered brush can also dislodge the sand and grit. Just be sure to use an up and down motion.
Melting Slicks
Joined: Jan 2007
Posts: 3,021
Likes: 133
From: Conejo Valley CA
You'll be surprised how much crap gets past the front radiator to the back one. I used a cardboard piece in between the radiators, so as to not blow stuff out of the rear radiator to the front. Then, I blow out the front.
Tapered brush can also dislodge the sand and grit. Just be sure to use an up and down motion.
Tapered brush can also dislodge the sand and grit. Just be sure to use an up and down motion.
Racer
Joined: Dec 2006
Posts: 297
Likes: 0
Over heating
I had this problem also some time ago. I blew out the radiator and everything else. After all of that i replaced the water pump and problem solved. I live in the Phoenix area and have 0 problems with overheating and it is 102 - 117 degrees and I regularly park and idle for several minutes at a time with no problems.
Good luck!
Good luck!
Burning Brakes
Joined: Sep 2006
Posts: 826
Likes: 69
From: Seoul Korea
I had this problem also some time ago. I blew out the radiator and everything else. After all of that i replaced the water pump and problem solved. I live in the Phoenix area and have 0 problems with overheating and it is 102 - 117 degrees and I regularly park and idle for several minutes at a time with no problems.
Good luck!
Good luck!
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Racer
Joined: Nov 2009
Posts: 438
Likes: 0
From: Cypress Texas
I know you have changed fluids in the cooling system, but have you flushed the system with a flush solution? I went thru a bout of overheating last year and found the primary cause to be passenger side fan motor had seized. I would at least make sure they are coming on. If the fans are fine, then I would possibly do a flush and change the t-stat while you're at to colder stat. The stat won't necessarily cure your over heating issues, it will just open at lower water temp and may help your system stabilize at a lower temp. I believe the factory one opens close to 200. As already mentioned, I would clear out debris between the radiator and ac condenser. You may also consider the radiator reservoir cap as well. If the system is not staying pressurized, you will boil over.
