Running Hot

Benesesso · 03-02-2008, 01:22 AM

I've had this problem with both of my turbo Supras. I found a radiator shop that built me a couple of 3 row radiators. They helped, but the cars still run hot in the Phoenix summers. I changed the fan in the 1990 to a direct-drive stainless steel flex fan, and that helped, but it's a bit noisy.

In the summer, at ~110+ deg., both cars get up to ~220-230, on accurate gages, and the faster I drive the hotter they get. I run 50% antifreeze to keep the boiling point high. Both cars have good head gaskets.

I am convinced that Toyota screwed up and should have provided for a lot more airflow thru the rad.

sd88supra · 03-02-2008, 06:47 AM

^You should ask mrnickeleye about keeping your turbos cool. He lives in the desert as well and made some modifications to his N/A to keep it running cool, and they might help your turbos. Only I can't remember exactly what he did, but it had to do with cutting something out to increase the hot air flowing out.

mkiiisupra · 03-02-2008, 12:16 PM

The rubber seal that runs along the back of the engine bay above the firewall.... I know he removed that. it helps some heat escape through there.

Also make sure ur radiator cap is in good condition

supramacist · 05-30-2008, 06:41 PM

Quote:

Originally Posted by Benesesso

I've had this problem with both of my turbo Supras. I found a radiator shop that built me a couple of 3 row radiators. They helped, but the cars still run hot in the Phoenix summers. I changed the fan in the 1990 to a direct-drive stainless steel flex fan, and that helped, but it's a bit noisy.

In the summer, at ~110+ deg., both cars get up to ~220-230, on accurate gages, and the faster I drive the hotter they get. I run 50% antifreeze to keep the boiling point high. Both cars have good head gaskets.

I am convinced that Toyota screwed up and should have provided for a lot more airflow thru the rad.

Do an ac delete and get rid of the condensor blocking the radiator.

SC: Is this the same mechanic that unplugged your coolant sensor??
If it is. Find a new one or start gearing up to get dirty. Because if this guy didn't know about the sensor. You don't want him near the internals.
This is your car not a guinnea pig.

CyFi6 · 05-31-2008, 01:31 AM

a new engine is going to be just as costly, if not more, and probably will blow a head gasket within a short time if its on the original gasket

Benesesso · 05-31-2008, 03:09 AM

>"Do an ac delete and get rid of the condensor blocking the radiator."<

Except that I live near Phoenix, and the days may not get below 100+ until October----.

dj7mge · 06-01-2008, 12:11 AM

rebuild what you have use a stronger gasket and try some water wetter it works really good for about 3months my dad uses it in his drag car dropped his operating temp from 220 to 180-200

JPJ · 06-03-2008, 03:21 PM

Quote:

Originally Posted by supramacist

Do an ac delete and get rid of the condensor blocking the radiator.

SC: Is this the same mechanic that unplugged your coolant sensor??
If it is. Find a new one or start gearing up to get dirty. Because if this guy didn't know about the sensor. You don't want him near the internals.
This is your car not a guinnea pig.

Exactly!!!
The fact that your mechanic did this leaves little room for doubting the fact that he is indeed a moron.

supradaddy0803 · 06-03-2008, 07:14 PM

Well as for a new motor you could get a 40k and drop it in but might as well do the head gasket when it is out and then drop it in. Other than that you could just upgrade like I did and get rid of the head gasket issues all together. But seeing as your having a mechanic do your work then I would say a upgrade would be out of the question seeing as the labor itself would kill you. But as for motors you can get a 40k 7mgte for like 700 bucks so I dont see how that is a ton more money. Plus look around you there might be a person from here that would be willing to help you do your HG and save you some money.

Benesesso · 06-04-2008, 02:23 PM

>"Other than that you could just upgrade like I did and get rid of the head gasket issues all together."<

How is it different?

03-02-2008, 01:22 AM	#1
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	I've had this problem with both of my turbo Supras. I found a radiator shop that built me a couple of 3 row radiators. They helped, but the cars still run hot in the Phoenix summers. I changed the fan in the 1990 to a direct-drive stainless steel flex fan, and that helped, but it's a bit noisy. In the summer, at ~110+ deg., both cars get up to ~220-230, on accurate gages, and the faster I drive the hotter they get. I run 50% antifreeze to keep the boiling point high. Both cars have good head gaskets. I am convinced that Toyota screwed up and should have provided for a lot more airflow thru the rad. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

03-02-2008, 06:47 AM	#2
sd88supra 3" Exhaust Join Date: Oct 2005 Location: San Diego, Ca Posts: 190	^You should ask mrnickeleye about keeping your turbos cool. He lives in the desert as well and made some modifications to his N/A to keep it running cool, and they might help your turbos. Only I can't remember exactly what he did, but it had to do with cutting something out to increase the hot air flowing out. __________________ -1987 5 spd N/A with TEMS: low miles! All stock with the exception of electric fans and an '89 front bumper, Yokohama 225/50/16 with stock rims. It's a mess and in the garage. -1987 5 spd Turbo with TEMS: miss-matched tires, needs lots of work, but it runs! Project car. -1988 N/A auto targa: all stock except 18" rims with Falken 265/35/18 in rear and 225/35/18 in front; daily driver.

03-02-2008, 12:16 PM	#3
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	The rubber seal that runs along the back of the engine bay above the firewall.... I know he removed that. it helps some heat escape through there. Also make sure ur radiator cap is in good condition __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/

05-31-2008, 03:09 AM	#6
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	>"Do an ac delete and get rid of the condensor blocking the radiator."< Except that I live near Phoenix, and the days may not get below 100+ until October----. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

06-03-2008, 07:14 PM	#9
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	Well as for a new motor you could get a 40k and drop it in but might as well do the head gasket when it is out and then drop it in. Other than that you could just upgrade like I did and get rid of the head gasket issues all together. But seeing as your having a mechanic do your work then I would say a upgrade would be out of the question seeing as the labor itself would kill you. But as for motors you can get a 40k 7mgte for like 700 bucks so I dont see how that is a ton more money. Plus look around you there might be a person from here that would be willing to help you do your HG and save you some money. __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

05-31-2008, 01:31 AM	#5
CyFi6 3" Exhaust Join Date: Oct 2007 Location: SLO Posts: 234	a new engine is going to be just as costly, if not more, and probably will blow a head gasket within a short time if its on the original gasket

06-01-2008, 12:11 AM	#7
dj7mge Stock Join Date: Mar 2008 Location: milwaukee,WI Posts: 18	rebuild what you have use a stronger gasket and try some water wetter it works really good for about 3months my dad uses it in his drag car dropped his operating temp from 220 to 180-200

06-04-2008, 02:23 PM	#10
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	>"Other than that you could just upgrade like I did and get rid of the head gasket issues all together."< How is it different? __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MKIV Supra TT Daytime Running Lights??	MIX	MKIV Supra	2	08-30-2007 02:52 AM
Running Sooooooo Rich! Help!	godgaveussid	MKIII Supra	4	08-29-2007 08:46 PM
Running very rich	OmeGa	MKIII Supra	3	12-09-2006 09:59 PM
supra running rough	finn	MKIII Supra	0	09-25-2006 07:10 PM
fixed the running rich problem	djalkyd	MKIII Supra	6	05-04-2006 04:31 AM