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Old 03-11-2013, 10:25 PM   #1
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Temperature

My temperature gauge was bouncing from cold to 1/4 hot, so it said it was running cold, which it wasn't. So I replaced my thermostat and it made it better but it's hovering around "N" out of "Normal" so it didn't fix that. And I know this isn't related but now my speedometer does not work, but just happened since I changed the thermostat. How can I fix both problems?
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Old 03-12-2013, 09:08 AM   #2
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When is the last time you did a complete coolant flush? (Not just a drain and fill)
Are you seeing any leaking from the water pump weep hole?

A coolant flush should be done every other year or so. Debris can build up and cause air pockets and blockage. Not to mention the coolant itself can get quite nasty. A lot of people neglect this basic simple maintenance. Most just keep topping it off until the radiator gets clogged and needs to be replaced.

My 94 did the same thing when I first bought it. A flush revealed what had to be at least 15 years of sludge. She ran cool and steady afterwards, but threw in a new radiator for good measure.
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Old 03-12-2013, 09:36 AM   #3
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its about time for my coolant to be flushed a bit (wont have to do a full flush since mine still looks really clean but still....) such a huge pain to get the air out of mine
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Old 03-12-2013, 06:53 PM   #4
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I've had the car for about a year an a half and never done it. And I'm almost 100% positive the idiot before me never did it. He did nothing to the car for maintenance.

---------- Post added at 03:49 PM ---------- Previous post was at 03:47 PM ----------

Aren't coolant flushes pricey?

---------- Post added at 03:53 PM ---------- Previous post was at 03:49 PM ----------

Nvm I did head gaskets about 8 months ago, but my car has been parked for about 3 of the 8 months. So it's been like 5 months since I did a coolant flush, so that won't be the problem.
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Old 03-12-2013, 07:03 PM   #5
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No, that wouldnt be it then. Any moisture around the weep hole on the water pump?

You can also have the radiator rodded, as it could have some blockage.
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Old 03-12-2013, 10:51 PM   #6
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No moisture in the peep hole! And I'm almost positive the rad is not clogged.
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Old 03-12-2013, 10:53 PM   #7
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OP did you burp the system when you did the thermostat swap?
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Old 03-12-2013, 10:55 PM   #8
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I'm unsure of "burping" the system.
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Old 03-12-2013, 11:00 PM   #9
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Quote:
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I'm unsure of "burping" the system.
did you bleed the system of all air? just like brakes when you swap certain parts you trap air in the system, and that air can keep things from working the way it should. example today a customer bought coolant and a flush kit for his new Chevy...he also swapped the thermostat with a new one. He came back later in the day with his Chevy overheating with the flush done and new thermostat on. I asked if he bled the system and he said what's that. So i walked outside and did it for him. Now on our cars it takes a bit longer to bleed then his Chevy (which had a nice air release valve on the WP)...as i bled the system he watched the needle plummet back into the safe zone.


if you've never done it youtube it...you'll see first hand how to do it
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Old 03-12-2013, 11:09 PM   #10
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No I did not do that :/ it's a must do? Could cause some problems?
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Old 03-12-2013, 11:11 PM   #11
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yes it is 100% a must do when you mess with the coolant system...an air bubble can block coolant just as bad as debris
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Old 03-12-2013, 11:20 PM   #12
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And can I bleed the system without having to take any parts off or replacing anymore parts? How easy is it?
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Old 03-12-2013, 11:24 PM   #13
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i bought a giant funnel with tube at Advance for $3.99 but it doesn't lock on like the one he uses sadly
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Old 03-12-2013, 11:42 PM   #14
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Oh man. Ok thanks a lot, I guess I'll do that. I do have school tomorrow, would It be alright if I drove it to school about 15km+ to get there and back home, and then do it when I get home? Or should I leave it at my house?
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Old 03-12-2013, 11:46 PM   #15
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as long as it's not overheating you're ok to drive it..just don't plan on using the heat
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Old 03-12-2013, 11:51 PM   #16
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Well I don't think it's overheating, but I did try using the heat on the way home tonight considering it was chilly out. Could it cause problems if I used the heat? Or I'm just not gonna get any? Lol( as I noticed tonight)
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Old 03-13-2013, 12:05 AM   #17
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Quote:
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No I did not do that :/ it's a must do? Could cause some problems?
Yes must do
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Old 03-13-2013, 05:54 PM   #18
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Ok, and where is the bleeder screw for the coolant system?
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Old 03-13-2013, 06:36 PM   #19
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look at the red box



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Old 03-13-2013, 06:54 PM   #20
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Is that on a gt? I have. V6 and I'm looking at my engine and I can't find anything simliar

---------- Post added at 03:54 PM ---------- Previous post was at 03:53 PM ----------

Is that on a gt? I have. V6 and I'm looking at my engine and I can't find anything similar
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Old 03-13-2013, 06:55 PM   #21
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no that's a 99-04 v6...yours is a single port i forgot..your screw is right above the thermostat i believe
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Old 03-13-2013, 06:56 PM   #22
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Well this is where my thermostat is
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Old 03-13-2013, 06:58 PM   #23
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Quote:
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Well this is where my thermostat is
see that white disk...that's the screw
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Old 03-13-2013, 06:59 PM   #24
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So I take off that white disk. And to bleed the system, just take it off and fill it till some comes out from the top of the bleeder?
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Old 03-13-2013, 07:06 PM   #25
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you run the car a few minutes after coolant change, then shut the car off, then loosen the bleeder valve bolt alittle, once you hear HISSING, then stop and let the air escape, then tighten it back up, run the car somemore and Repeat.
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Old 03-13-2013, 07:22 PM   #26
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I fill up with coolant, then ran the car. Then stopped. Loosened the bleeder and coolant just came out, no hissing.
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Old 03-13-2013, 07:25 PM   #27
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how are you filling up the coolant?
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Old 03-13-2013, 07:32 PM   #28
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Well at first I tried to follow "Eric the car guy" video on this, so what I did was turn heat on Max and then turn off the vent and then I took off the bleeder screw and filled up my coolant, squeezing the rad hose so it got all through the system. Then I put the bleeder screw back on and turned my car on for about 3 minutes, then did what you said and loosen the bolt till it hisses. But coolant just overflowed out of it
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Old 03-13-2013, 07:34 PM   #29
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so then we know it's not an air in system issue...hate to say we're back to square one but at least now we know the system is properly bled
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Old 03-13-2013, 07:40 PM   #30
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Ok :/ and how do I tell if my engine is over heating without it fully overheating? Like should I be able to grab my rad hose and it be pretty hot but not burn my hand? Like how can I check if my gauge doesn't work and I don't drive it long enough for it to show easily noticble signs of ever heating?
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Old 03-13-2013, 07:43 PM   #31
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i will say our stock gauges are horrible...in my last sixxer i installed an autometer water temp gauge to keep a good eye on temps during track season. if your gauge isn't working well it's an idea..you could pick up a cheap sunpro to help out. besides that you're just gonna have to watch it and see if it tries to get to hot

hopefully someone else can add in their thoughts
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Old 03-13-2013, 07:47 PM   #32
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Hmm ok, thanks a lot for the help. My oil pressure gauge is also not working and my speedometer fails here and there, my gauges just messed up. But I know my oil pressure is fine I've checked. , is it easy to install a thermostat gauge?
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Old 03-13-2013, 07:51 PM   #33
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yeah...think about maybe a dual pillar...i had lunar series water temp and oil pressure gauge...they worked great
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Old 03-13-2013, 08:09 PM   #34
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Ok i thin ill do that, they cheap?
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Old 03-13-2013, 09:26 PM   #35
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lunars...nah...but if you check autometers site out i'm sure you could find some decent priced ones
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