Results 1 to 18 of 18
Thread: cooling problems
-
11-14-2005, 03:28 AM #1
- Join Date
- Nov 2005
- Location
- GA
- Age
- 39
- Posts
- 6
white- 1995 z28
cooling problems
car heats up when idling at a light or in traffic (almost got to the red), cools back down when moving.
checked all 3 relays by switching them one by one into the fog light position and checking, fog lights worked with all 3. fluid is fine.
put a new thermostat on it. cranked it and let it sit, thermostat opened up, top tube got hot. everythings a go there. temperature was still creeping up. fans were not coming on! turned the a/c to max and the fans came on and the temperature started dropping back down. turned the a/c back off, and the fans kept going, and the temperature went right back down to where it normally is! what the hell??
yesterday was a nice day and i was driving around for a while with the tops off and no a/c, first time ive done that for more than a short trip to town... guess this is why i never noticed it. normally im using the a/c so the fans are on and its a non issue. so what does this mean, i have to turn the a/c on and back off whenever the temp gets too hot?
what do i check next? this is the first car ive owned with electric fans...
-
11-14-2005, 02:03 PM #2LS1ROCGuest
You may posibly have a bad fan switch. Or the wire for it could be screwed up. A lot of times overheating lt1's will suffer from air pockets in the cooling system .there is a little bleeder screw there to help with that. Did you bleed the air out after the thermostat install?Another thing could be that the themostat is stuck open. This CAN cause overheating. do you have access to a scanner?
-
11-14-2005, 06:02 PM #3
Mine was doing that for a few days before it finally started boiling the coolant in under 2 minutes flat... turned out that the thermo was going bad and finally went... but you seem to have ruled that out... good luck
-
11-14-2005, 06:26 PM #4
- Join Date
- Nov 2005
- Location
- GA
- Age
- 39
- Posts
- 6
white- 1995 z28
Originally Posted by LS1ROC
-
11-23-2005, 12:34 PM #5Originally Posted by LS1ROC
The car also runs slightly hotter than it used to while on the highway under normal driving.
Any ideas?
-
11-23-2005, 05:01 PM #6LS1ROCGuest
First you must answer this for me.....Have you altered the cooling system at all?Thermostat?Drained the coolant?Anything?And have you checked the coolant level at all? 9 times out of ten heater problems will be be linked to the cooling system problems.
-
11-23-2005, 10:10 PM #7Hark_ZGuest
My car had the exact same symptons. They traced it to the waterpump where the bearing was shot and it leaked coolant out of the 'weephole'. Your car leakin coolant ever??
-
11-24-2005, 06:57 AM #8Originally Posted by Hark_ZOriginally Posted by LS1ROC
Is it normal for the radiator to be an inch or two low after the engine cools? I always thought that as it cooled, it drew more from the reserve tank. Is this an indication of a defective radiator cap?
I'll have to look hard at the pump. I assumed that wasn't likely the culprit since the engine temp didn't increase in too serious a way. I'll check out the weep hole to see if there are any signs of leakage. The pump would make sense since the heater gets warm, indicating that there is coolant but that it isn't getting the "super hot" water coming from the engine.
Thanks guys!Last edited by my5thNewUsernameHere; 11-24-2005 at 04:34 PM.
-
11-24-2005, 11:33 AM #9LS1ROCGuest
When You Start The Engine Cold For The First Time ,take The Cap Off The Radiator And After You Start It ,check The Level, It Should Be Full To The Top And Then Your Overflow Should Say Full Cold .if Its Not Full Fill It Up We Have To Get This Right Before Jumping To Mechanical Problems. If You Say It Is 1 To 2 Inches Low ,i Assume You Mean The Radiator And No This Is Not Normal. For Optimum Cooling It Needs To Be Full.write Back After Doing The Cold Temp Level Check. One More Thing , Is Your Air Dam Underneath The Radiator In Good Shape?
-
11-24-2005, 04:43 PM #10Originally Posted by LS1ROC
I believe that the Air Dam is in good shape, but I'll double check it tomorrow.
Another other idea that my uncle cited during our Thanksgiving dinner was the possibility of a blown head gasket. I doubt this is the case because I'd be having lots of performance issues and/or leaks if I was losing that much coolant that fast to a bad gasket.Last edited by my5thNewUsernameHere; 11-24-2005 at 04:46 PM.
-
11-24-2005, 11:00 PM #11Originally Posted by my5thNewUsernameHere
-
11-26-2005, 06:09 AM #12Originally Posted by 5.0THIS
My dad's car had a blown gasket and you're right, it stuck right out in the oil. The car also ran like crap and you could even smell the coolant in the exhaust fumes.
-
11-28-2005, 03:39 PM #13LS1ROCGuest
Keep filling the radiator while its cold until it won't take anymore. And make sure your not overfilling the system by watching the full cold and full hot lines. Be sure and bleed air from the system as you work with this. Also do one more thing for me. Start the car and let it warm up completely. Turn the heater on and give it a minute. Feel both the inlet and outlet hoses of the heater core. If one hose is alot hotter than the other, the heater core may be stopped up. Some temperature difference is normal but you will probably know whats right and whats wrong. If the inlet hose is extremely hot your heat should be hot. Any questions on this just ask.
-
02-21-2006, 02:14 PM #14Originally Posted by LS1ROC
The weather was nice enough today so I drove the car for the first time since I last replied. Since it was relatively cold today, I can now say for certain that it's not blowing as hot at it needs to. From what I recall the heater core hoses going in and out were both relatively hot and at the same temp, but I'm going to check this again.
If the heater core is jammed up, how would you expect the rest of the cooling system to act?
-
02-23-2006, 04:53 PM #15
- Join Date
- Aug 2005
- Location
- Central PA, USA
- Age
- 67
- Posts
- 102
Red- 1995 Trans Am 6 Speed
Originally Posted by LS1ROC
If it turns out to be the water pump, plan on replacing the Opti-Spark as well. As the water pump goes, so goes the Mr. Opti.
-
02-23-2006, 08:38 PM #16Originally Posted by my5thNewUsernameHere
-
02-25-2006, 06:19 PM #17Originally Posted by seppburgh
I don't think it's the water pump because there really doesn't appear to be any coolant loss as far as I can tell, though I do need to look a bit closer at the weeps for sanity's sake.
-
02-25-2006, 06:21 PM #18Originally Posted by Red on Red WS6
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
Similar Threads
-
Question: cooling
By 2000dreambird in forum General HelpReplies: 16Last Post: 07-20-2009, 07:01 PM -
Help: Cooling
By repeter in forum GTOReplies: 2Last Post: 11-12-2008, 10:49 AM -
cooling problems
By knoll5150 in forum External EngineReplies: 3Last Post: 05-24-2008, 08:07 AM -
Cooling down
By Mike's02Z28M6 in forum Computers / GamingReplies: 7Last Post: 03-07-2008, 07:04 AM -
cooling problems
By tnnt in forum LT1Replies: 4Last Post: 02-17-2008, 02:20 PM
Bookmarks