Overheating
Overheating Hey guys so I have had my car working well for a couple years with out an issue. So I took the car to the shop to get the A/C charged. I received the car back and it was blowing cold air and everything was fine. So I took the car out yesterday and was driving, it was hot (95*) so I turn on the a/c and it wasn't blowing cold air. So I put it on the low control to drive a lil about 20 minutes and still nothing, so I turned it to the off position and about 10 minutes later the temps shot up and lights came on. I pulled over and had coolant shooting out of the reserve cap....
Long story short I took the car home and don't see any leaks, was wondering if the shop could have messed anything up (that I could look for) while fixing the a/c or if it could be a shot water pump?? (My first thought was that the water pump went) Car has 80K and original water pump.
Any help could would be appreciated.
Thanks guys
Long story short I took the car home and don't see any leaks, was wondering if the shop could have messed anything up (that I could look for) while fixing the a/c or if it could be a shot water pump?? (My first thought was that the water pump went) Car has 80K and original water pump.
Any help could would be appreciated.
Thanks guys
First....water pumps don't go bad, they only have failures to the seals and they start to leak. They will keep pumping coolant the same all the time.
(((Unless you are the one in a million that has a shaft actually shear....but if that happens you will overheat into the red pretty fast and you will never run cool)))
The obvious thing to make you overheat quickly could be a blocked condensor.....see if a bag or something is stuck up in front of it. That will also keep you from blowing cool air. The condensor will get hot and in turn make the radiator hot and then you will overheat.
Also....maybe they did something and the fans are not working properly....because when the A/C is turned on the fans (both) will come on or you will run hot.
.
(((Unless you are the one in a million that has a shaft actually shear....but if that happens you will overheat into the red pretty fast and you will never run cool)))
The obvious thing to make you overheat quickly could be a blocked condensor.....see if a bag or something is stuck up in front of it. That will also keep you from blowing cool air. The condensor will get hot and in turn make the radiator hot and then you will overheat.
Also....maybe they did something and the fans are not working properly....because when the A/C is turned on the fans (both) will come on or you will run hot.
.
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I didn't mean to make a big deal out of it but this section is already clogged up with JY (build my 5.3 turbo) questions and other useless stuff that has been covered a million times. All the good technical threads are lost in the mists of stuff like this.
OP relax.. Me calling you out has nothing to do with your blower. I just got done doing a novi 2000 on a C5. I'm far more irritated by the mindless 5.3 turbo threads than this one. At the end of the day , I get it. This section has a lot of traffic and IMO far superior technical minds.
Last edited by oscs; Jul 22, 2015 at 01:16 PM.
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Verdad Gallardo OSCS thanks for understanding, got no issue with you, Im not upset by any means. Theres always someone that says something like that and its usually a turbo guys. I know this section is for FI stuff and i understand why some people get upset but really and truly at the end of the day just don't read it or don't comment... this is america and we have the right to say whatever we want and the other person does not have to like it hahaha.
This section does usually have the most knowledgeable people in and out of it. I always start a tread somewhere else first and i always come back in here bc i get a answer or something close so i can move forward.
This section does usually have the most knowledgeable people in and out of it. I always start a tread somewhere else first and i always come back in here bc i get a answer or something close so i can move forward.
TECH Enthusiast
Joined: Jul 2008
Posts: 577
Likes: 1
From: League City, Tx
I would check the radiator cap, make sure it holds good pressure. Check the fans and make sure they are coming on. Odds are, its going to run hot with AC on and the intercooler blocking air flow to the radiator... We all fight this. However it shouldn't get so hot that it spews coolant out of the reservoir. It must have gotten REALLY hot... Which you don't want to do often, you can hurt head gaskets or worse doing that.
You may need to pressure up the cooling system and make sure it holds pressure correctly... (ie, not leaking pressure into the cylinders).
It can be a lot of stuff, but for it to puke coolant that bad, I'd be suspect of the cap.
You may need to pressure up the cooling system and make sure it holds pressure correctly... (ie, not leaking pressure into the cylinders).
It can be a lot of stuff, but for it to puke coolant that bad, I'd be suspect of the cap.
so checked tonight and the fans are not kicking on for some reason, i checked the fuse and it was alright so im thinking its a relay... anyone got a good idea on checking the relays and seeing if the work? was thinking about running wires off of the plugs so i can get a tester them and plugging the relay in and test them.
Also i was thinking since the engine got so hot, does changing the oil sound like a good idea??
thanks guys
Also i was thinking since the engine got so hot, does changing the oil sound like a good idea??
thanks guys
So i had two codes 0480 and 0481 which are fan relays and i replaced them erased the code and started the car and they came back on after a min. So idk where to go from here, Any help would be great.
First....water pumps don't go bad, they only have failures to the seals and they start to leak. They will keep pumping coolant the same all the time.
(((Unless you are the one in a million that has a shaft actually shear....but if that happens you will overheat into the red pretty fast and you will never run cool)))
The obvious thing to make you overheat quickly could be a blocked condensor.....see if a bag or something is stuck up in front of it. That will also keep you from blowing cool air. The condensor will get hot and in turn make the radiator hot and then you will overheat.
Also....maybe they did something and the fans are not working properly....because when the A/C is turned on the fans (both) will come on or you will run hot.
.
(((Unless you are the one in a million that has a shaft actually shear....but if that happens you will overheat into the red pretty fast and you will never run cool)))
The obvious thing to make you overheat quickly could be a blocked condensor.....see if a bag or something is stuck up in front of it. That will also keep you from blowing cool air. The condensor will get hot and in turn make the radiator hot and then you will overheat.
Also....maybe they did something and the fans are not working properly....because when the A/C is turned on the fans (both) will come on or you will run hot.
.
So those rare situations happen.
The way I found out (and this was easier because it was a Fiero and there was some distance involved), but I filled up half of the system with distilled water. Then the other half with coolant. I started the car and watched to see if the water in the front eventually ended up with coolant in it. It did not, which told me the water was not circulating, and I took off the water pump, and voila! it was the sheared shaft you mentioned.
Did your fans come on at all? Do you have HPTuners or something to command the fans on?
no i don't have a hptuner (been thinking about getting it), what i did was replaced the relays (Fan 1&2 that threw the codes) and turn the A/C on and from what i understand it should turn the fan on correct?? and it wasn't even a minute before the codes showed back up (SES light). So i would assume that the new relays that i replace r shot. only thing i could think of its shorting out somewhere. But i dont understand bc the car has been fine for more than 2 years and "all the GM shop did was charge the A/C system"
could the fan be bad and its blowing the relays?? what should be the next step to test the fan?
could the fan be bad and its blowing the relays?? what should be the next step to test the fan?
Would a ground that's not grounded completely or a short cause the relays to be fried?? Just don't understand how I put in two new fan relays in and it never terns the fan and "both relays are bad again" What could cause this?
Launching!
Joined: Jun 2006
Posts: 209
Likes: 2
From: Middle of MI
There is an electrical problem somewhere, did you check to make sure the fans are still good? If they are internally shorted somehow, that can cause problems. After that, check to make sure you don't have a short to ground on either the signal or power supply side of the relay.
Check to see if the relay works (feel the click when power/ground are supplied to the signal side), if they work, then check to see that when activated, you have continuity on both sides of the power supply side (that is now clicked closed).
After that you need to check to see if you have a short to power or ground in the wiring. disconnect both ends of the wire to be checked, you should have no power or ground on it, key on or off.
hope this helps, let us know what you find.
Check to see if the relay works (feel the click when power/ground are supplied to the signal side), if they work, then check to see that when activated, you have continuity on both sides of the power supply side (that is now clicked closed).
After that you need to check to see if you have a short to power or ground in the wiring. disconnect both ends of the wire to be checked, you should have no power or ground on it, key on or off.
hope this helps, let us know what you find.