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Thread: Overheating ls1
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07-03-2009, 11:14 PM #1
- Join Date
- Jul 2009
- Location
- Memphis
- Posts
- 2
Midnight Blue- 1999 Camaro Z28
Overheating ls1
Just replaced my waterpump and radiator and my car is still overheating, when i stop antifreeze spits out of the jug cap... anyone have a clue whats going on?
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07-04-2009, 04:15 AM #2
Did you bleed the air out? I would start with a new Rad cap and you may have to check the thermostat.
J2001 SS, Its not the car its the Driver that matters....
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07-04-2009, 09:55 AM #3
Pressure bleed it. The engines in these cars sit so level with the radiator that unless you jack the front way up or pressure bleed it the air will not come out.
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07-04-2009, 10:22 AM #4
- Join Date
- Nov 2007
- Location
- SATX
- Posts
- 847
Pewter- 2000 Trans Am
just remove the line that goes to the TB before you fill up the radiator with antifreeze, pour AF and as soon as the fluid starts comming out of the line connect it back. turn on engine and leave the cap open when you start the engine. once the thermostat opens if the block had air in it, it will bubble and the fluid level will lower down, so top off till it sits level for a while.
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07-04-2009, 10:43 AM #5
I am assuming you did put in a new thermostat, if not that could be the problem, my car would overheat at extend range in speeds over 70ish, but would run around 210 at 55 mph , the problem was a piece if rubber from the inside of the thermostat that had actually came apart and had stuck in the thermostat itself and caused it to not work properly.
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07-04-2009, 05:28 PM #6
Does it overheat at highway speeds or just when stopped?
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07-05-2009, 05:13 AM #7
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07-05-2009, 11:25 PM #8
- Join Date
- Aug 2005
- Location
- Columbia,SC
- Age
- 50
- Posts
- 511
Millienum Yellow- 2003 Corvette Z06
blown head gasket?
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07-06-2009, 12:32 AM #9
When you put everything back were you careful and avoided putting the radiator back in ontop of the wiring harness for the fans, are the fans coming on? This is the problem i had when i replaced the radiator because my dumb ass numb skull friend who supposedly helped restore the 65 mustang he drives sat it right ontop of it and burned it out.
If thats not it, thermostat for sure inless you have blown the head gasket driving it hot.
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07-11-2009, 12:26 PM #10
- Join Date
- Jul 2009
- Location
- Memphis
- Posts
- 2
Midnight Blue- 1999 Camaro Z28
..
yes the fans are coming on but not until in hits 220 dergees
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07-11-2009, 01:30 PM #11
Start it up and monitor the temp of your radiator hoses. Whatever your thermostat is rated for, the hoses should start to warm up a little above that temp and within a few minutes should be hot.
If the thermostat is stuck closed, or is not opening all the way, the hoses will not get hot. Shut it down as you have either a bad stat or the cooling system is airlocked.
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07-11-2009, 07:13 PM #12
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07-12-2009, 02:06 PM #13
when i bleed my radiator with the cap off after a little bit it starts to over flow and than shoot out like a gyser. any thoughts? i am as well having a slight overheating problem.
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07-12-2009, 03:01 PM #14
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07-12-2009, 03:33 PM #15
tried to do it 2x and get some bubbles everytime till it blows out
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07-12-2009, 03:36 PM #16
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07-12-2009, 03:41 PM #17
had the water pump replaced bout a year ago but didnt have the problem till last night.
the temp gauge went up right before the red so i shut it down figured it sucked an air pocket from some where
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07-12-2009, 03:43 PM #18
is there a way to test the relays? i suspect the fans r not working.
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07-12-2009, 03:52 PM #19
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07-12-2009, 03:54 PM #20
i dont have a power probe, i do have a volt meter.
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