Cooling Problem after mods????
Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
Cooling Problem after mods????
I have completed a few mods, H/C, Vararam, 160 degree thermostat, ect, HP tune set fans to come on at 180. Even tested the thermostat and even changed out to one that opened a little closer to 160. Now car wants to get hot in traffic. I also followed all of the recomendations for getting the air out of the system, and also added water wetter. On the highway the car runs cool, 180-190, but in traffic with 100 degree weather the car gets about 235 and cuts off the A/C. I am looking for any advise to see why this thing wants to run hot? Also what percentage should the fans be set to inside of HP tuner?
BTW I have had the car running for about a week, and really don't think there is any air in the coolant system.
Thanks for any help,
Aaron
BTW I have had the car running for about a week, and really don't think there is any air in the coolant system.
Thanks for any help,
Aaron
Pro
Joined: May 2000
Posts: 610
Likes: 1
From: Midland Texas
St. Jude Donor '09-'11
Set the fan percentages like this from the first cell on the left at 192 degrees:
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
Set the fan percentages like this from the first cell on the left at 192 degrees:
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
Thanks again for the info I think you problably nailed it on the head.
Drifting
Joined: Jul 2002
Posts: 1,446
Likes: 1
From: Garden State
I was just doing some HP Tuners research and was coming to the same conclusion. I don't think that my tuner set the percentages high enough, as I remember he only set them at 60%, and the temps here in Dallas during the summer must need more. I am going to take it there in the morning to check that. As far as checking for air, I am getting tired of blowing in the overflow with the coolant line off the head. But I just did it again, and absolutely no air is coming out just steady stream of coolant.
Thanks again for the info I think you problably nailed it on the head.
Thanks again for the info I think you problably nailed it on the head.
Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
The coolant level never goes down and I don't see any puddles in the garage. All of the connections look good, and no coolant smell, and the thermostat looks dry as can be. I don't think it is a leak, but I guess it could still be an air bubble, but I think I have gone through every step possible to get all of the air out.
Safety Car
Joined: May 2000
Posts: 4,818
Likes: 347
From: Albuquerque NM
Set the fan percentages like this from the first cell on the left at 192 degrees:
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
39-47-56-74-90-90-90...
Do this by copying the cells from the 210 temp cell and to the right and pasting them in the 192 cell to the right.
This has worked great for me.
Check for air one more time...
Joe
Safety Car
Joined: Jun 2004
Posts: 3,563
Likes: 2
From: Dallas Tx
traffic is the key symptom. That means it's an airflow problem. If it were a bubble it would overheat in any driving condition, and overheat fast.
I'd rinse out the bottom the of the radiator just to make sure there is no debris. Then get into the fan settings. Probably the fan settings will be the solution.
The radiators are so low on these cars I've been surprised by how much debris can be in one only a few years old.
I'd rinse out the bottom the of the radiator just to make sure there is no debris. Then get into the fan settings. Probably the fan settings will be the solution.
The radiators are so low on these cars I've been surprised by how much debris can be in one only a few years old.
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Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
Well I was at the tuner today, checked the fans, and that was not the problem. I tried again to make sure that there is not an air bubble in the system, and I am pretty sure that is not the problem. Anyone else have this problem ever? I am running out of ideas. I have replaced thermostats, bled the system for air, blown in the overflow tank with the hose off the heads just can't seem to get the car to run under 220 in traffic.
Thanks,
Aaron
Thanks,
Aaron
Drifting
Joined: Jul 2002
Posts: 1,446
Likes: 1
From: Garden State
I would replace the stat, maybe there is a problem with it. It wouldnt be the first time someone got a defective stat.
Or throw your stock stat back in and see if the problem goes away.
Edit: just saw you already did that.
Or throw your stock stat back in and see if the problem goes away.
Edit: just saw you already did that.
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
I may be wrong, but I think you still have some air in it. Take off the small hose on the drivers side head, take off the reservoir cap, and blow until coolant comes out the hose you just removed. DO NOT SWALLOW ANY COOLANT! Put the hose back on, top off, and you should be good to go.
Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
I have done that several times, I get coolant out of the hose, and also the head coolant connection, no spurts, steady constant flow. I have done all sorts of research, and the only thing I can possible think is maybe a head gasket problem, but I put brand new GM gaskets in, don't know????
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
I have done that several times, I get coolant out of the hose, and also the head coolant connection, no spurts, steady constant flow. I have done all sorts of research, and the only thing I can possible think is maybe a head gasket problem, but I put brand new GM gaskets in, don't know????
Instructor
Joined: Mar 2006
Posts: 158
Likes: 0
From: Houston TX
If your vette is running 180-190 cruising down the highway and running hot when sitting still, well, the only difference between the two is air flowing through the radiator. Your engine sees more load while cruising down the highway than at sitting still at idle and if its able to stay around 180-190, then your thermostat and engine is fine. I think you have a fan problem or a fan programming problem.
Drifting
Joined: Jan 2006
Posts: 1,560
Likes: 3
From: FNDA Beach Florida
My similar mods and status
-Mine initially got so I put back in the original 160 that was taken out as they put new ones in. I think I had a bum thermostat
-Not likely but make sure no air in the system and I used some water wetter. Not sure what degree that helps but what the heck
-My fans come on right away what ever that setting is not 180
-My car was running 190-195 could be higher but only delt with that a day before the above was done
-Now I'm at 180 hwy and in traffic with Florida at 105 index I was at 190
Not sure how much this all helps you
-Mine initially got so I put back in the original 160 that was taken out as they put new ones in. I think I had a bum thermostat
-Not likely but make sure no air in the system and I used some water wetter. Not sure what degree that helps but what the heck
-My fans come on right away what ever that setting is not 180
-My car was running 190-195 could be higher but only delt with that a day before the above was done
-Now I'm at 180 hwy and in traffic with Florida at 105 index I was at 190
Not sure how much this all helps you
Pro
Joined: Jul 2006
Posts: 608
Likes: 1
From: LZ IL
So I have it straight, going down the road at better than 45 mph what is the coolant gauge reading? Where does it normally settle in cruise?
I see the answer to my question above.
Did you do an under drive pulley and how many miles on the car?
I see the answer to my question above.
Did you do an under drive pulley and how many miles on the car?
Last edited by oneblackvette; Aug 11, 2007 at 10:36 PM.
Instructor
Joined: Jun 2005
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Thread Starter
Instructor
Joined: Jun 2006
Posts: 242
Likes: 2
From: Mckinney TX
Yeah, I tried that, also took out the radiator and had it flow tested, all was good. I took the heads back off to see if I had put something together wrong. I also ordered new custom cometic head gaskets after measuring the chamber on my heads. I had to small of a bore in there, so hopefully this will help. If none of this helps then I am going to change the water pump, and after that I don't know.