Overheating with A/C
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Overheating with A/C
Car runs pretty normal relative to engine heat seems a little higher than most other cars but its constant. When I run the A/C it warms up quite a bit and the other day I had to pull over on the highway because it got so hot and I didn't want to hurt the engine. Replaced the thermostat, changed coolant and cleaned out my radiator. What do you think might be the problem causing it to over heat? I'm assuming it's the radiator (it doesn't look so hot, kind of beat to **** when I bought the car), I just don't want to spend the money on a new one if it's not the problem. Thanks.
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Well the gauge tops out at 260 and the other day when I pulled over it was around 240-250. Everyone locally I've talked to (dyno shops and such) has said anything over 220 is too hot.. not necessarily harmful until but way to hot for what it should be running.
It runs great when my A/C is off, it's a mark or two below 220 with it off. The second I turn it on it goes straight to probably 230 within a few minutes and keeps going up if I leave the A/C on.
And on a side note it's cammed/full exhaust/cai and intake monifold so I'm pushing for more HP and lower heat = more hp so getting to 240+ let alone 220 is robbing potential HP.
It runs great when my A/C is off, it's a mark or two below 220 with it off. The second I turn it on it goes straight to probably 230 within a few minutes and keeps going up if I leave the A/C on.
And on a side note it's cammed/full exhaust/cai and intake monifold so I'm pushing for more HP and lower heat = more hp so getting to 240+ let alone 220 is robbing potential HP.
Drifting
Joined: Mar 2010
Posts: 1,628
Likes: 15
From: Seattle WA
Well the gauge tops out at 260 and the other day when I pulled over it was around 240-250. Everyone locally I've talked to (dyno shops and such) has said anything over 220 is too hot.. not necessarily harmful until but way to hot for what it should be running.
It runs great when my A/C is off, it's a mark or two below 220 with it off. The second I turn it on it goes straight to probably 230 within a few minutes and keeps going up if I leave the A/C on.
And on a side note it's cammed/full exhaust/cai and intake monifold so I'm pushing for more HP and lower heat = more hp so getting to 240+ let alone 220 is robbing potential HP.
It runs great when my A/C is off, it's a mark or two below 220 with it off. The second I turn it on it goes straight to probably 230 within a few minutes and keeps going up if I leave the A/C on.
And on a side note it's cammed/full exhaust/cai and intake monifold so I'm pushing for more HP and lower heat = more hp so getting to 240+ let alone 220 is robbing potential HP.
Have you checked to ensure both of your cooling fans are actually spinning? Also, does it overheat at freeway speeds or drop back down to 190-200ish?
What are your ambient temps?
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It's been around 90-105 this summer. Lower 90's the past week or so. And the engine gets that hot at any speed, maybe just a little lower going 70 but not noticeably.
I'm not sure the "normal" running temp is on an LS-1. I have the z06 which is the LS-6 but I doubt it makes a difference on engine temp.
I'm not sure the "normal" running temp is on an LS-1. I have the z06 which is the LS-6 but I doubt it makes a difference on engine temp.
Drifting
Joined: Mar 2010
Posts: 1,628
Likes: 15
From: Seattle WA
It's been around 90-105 this summer. Lower 90's the past week or so. And the engine gets that hot at any speed, maybe just a little lower going 70 but not noticeably.
I'm not sure the "normal" running temp is on an LS-1. I have the z06 which is the LS-6 but I doubt it makes a difference on engine temp.
I'm not sure the "normal" running temp is on an LS-1. I have the z06 which is the LS-6 but I doubt it makes a difference on engine temp.
Thread Starter
Intermediate
Joined: Jun 2012
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Well the radiator doesn't look so hot even after cleaning a bunch of crap out of it. It's pretty banged up so I was thinking I might need a new one just didn't want to go spend that kind of money if it wasn't the issue.
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Thread Starter
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No the guy before me took at the front bolts to lower it completely. Too low to have it on there. He also managed to cut out the entire radiator shroud for the CAI he put on so I just built some custom radiator shrouds to fill in the gaps around the intake filter.
Drifting
Joined: Mar 2010
Posts: 1,628
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From: Seattle WA
That is at least some of your issue. The middle spoiler is required to properly pull air into the radiator at speed. Doesn't explain overheating at low speeds unless your fans aren't working as well...
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I haven't personally check the fans. I just got my car tuned and the guy said they both were when he set the temp for the fans to kick on (idk what he set them at). So, as far as I know they are both working properly. The guy said he would suggest a new radiator after he looked at my current one, just wanted to get some input from here on what you guys thought. Have found some for $120
Le Mans Master
Joined: Aug 2000
Posts: 6,273
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From: Austin TX
I haven't personally check the fans. I just got my car tuned and the guy said they both were when he set the temp for the fans to kick on (idk what he set them at). So, as far as I know they are both working properly. The guy said he would suggest a new radiator after he looked at my current one, just wanted to get some input from here on what you guys thought. Have found some for $120
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
You might check the GM suppliers who advertise here.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
Suggest you consider raising it at least enough to reinstall the chin spoiler.
Thread Starter
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I am going to raise it back up. I just have to order new bolts because he took them out completely.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX