What themostat to run

Chevyguy · 09-04-2001, 08:34 AM

I have a 90 Coupe slowly transforming from a stone stock somewhat neglected state.

I need to swap out the original Tstat soon. Should I get a 160° unit?? I have a 3 core rad and a flex fan ( too many cracks in the stock plastic for my taste, and clutch was on its way out) On some of the hot days with the AC it got to 200° or a little higher and would bounce down then back up, sounds like the Tstat cycling to me. It used to never move off 170 previously.

So any suggestions for a mostly stock motor t stat temp would be appreciated

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Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks

74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
<A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

PKRWUD · 09-04-2001, 12:33 PM

Don't go lower than a 180, and buy it from Ford. Stant sucks, and Ford is the only place I know of selling the correct t-stats (with the little bobble head bleeder that everyone calls a small bypass)

Ford OEM 180. With winter coming, you might want to get the correct t-stat instead (Ford OEM 192)

Good time to buy a new cap, too.

Take care
~Chris

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Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

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Chevyguy · 09-04-2001, 03:20 PM

Hey, thanks for the Ford part alert. I found out the hard way about my PCV valve. I almost bought a Stant this weekend but could not decide what temp rating to go with. BTW I have a brand new Stant cap, went on with the new 3 row radiator back in March, should I also get a Ford one while I'm at the parts counter??

------------------
Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks

74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
<A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

PKRWUD · 09-04-2001, 03:31 PM

Stant t-stats suck, but their red lever pressure relief caps aren't bad. I usually recommend them. Whichever you use, make sure it's at least a 16 pound cap. 17 would be even better.

Take care
~Chris

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

09-04-2001, 08:34 AM	#1
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	What themostat to run I have a 90 Coupe slowly transforming from a stone stock somewhat neglected state. I need to swap out the original Tstat soon. Should I get a 160° unit?? I have a 3 core rad and a flex fan ( too many cracks in the stock plastic for my taste, and clutch was on its way out) On some of the hot days with the AC it got to 200° or a little higher and would bounce down then back up, sounds like the Tstat cycling to me. It used to never move off 170 previously. So any suggestions for a mostly stock motor t stat temp would be appreciated ------------------ Frank W 90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links 88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks 74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage <A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

09-04-2001, 12:33 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Don't go lower than a 180, and buy it from Ford. Stant sucks, and Ford is the only place I know of selling the correct t-stats (with the little bobble head bleeder that everyone calls a small bypass) Ford OEM 180. With winter coming, you might want to get the correct t-stat instead (Ford OEM 192) Good time to buy a new cap, too. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

09-04-2001, 03:20 PM	#3
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	Hey, thanks for the Ford part alert. I found out the hard way about my PCV valve. I almost bought a Stant this weekend but could not decide what temp rating to go with. BTW I have a brand new Stant cap, went on with the new 3 row radiator back in March, should I also get a Ford one while I'm at the parts counter?? ------------------ Frank W 90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links 88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks 74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage <A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

09-04-2001, 03:31 PM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Stant t-stats suck, but their red lever pressure relief caps aren't bad. I usually recommend them. Whichever you use, make sure it's at least a 16 pound cap. 17 would be even better. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!