Cooling Issue(s)...

Lefty · December 1st, 2008, 10:23 AM

96' GT, 5-spd.

My car used to run at the perfect normal temp. The temp gauge needle used to be right on in the middle. Now I just noticed a couple of weeks ago that it is running probably about an eighth on an inch lower from half towards the colder side. And it stays there. Even after about 30 minutes of driving. THEN...sometimes while I'm driving it'll go up to half and keep hauling ass up about another eighth of an inch ABOVE the middle towards the warm side. Doesn't go any hotter. It'll stay up there for about 30-40 seconds then go back down to the "colder" side of the gauge like I mentioned earlier. So I wouldn't say it's overheating, but it is a weird issue. Any suggestions of what could be going on here??? I put a new manifold on (w/ the aluminum crossover) because my stock manifold blew due to the shitty coolant (plastic) crossover. When I replaced the manifold about 5k miles ago I *DID* replace the thermostat. Any help, suggestions, or idears would be appreciated. Thanks guys!

-Troy

NO_PI_NO_POWER · December 1st, 2008, 06:33 PM

Is the new one a PI manifold?

Lefty · December 1st, 2008, 06:43 PM

No, non-pi with aluminum cross over

NO_PI_NO_POWER · December 1st, 2008, 07:01 PM

yeah, I couldnt tell ya. I know I had problems with my car heating when I put the PI manifold on the npi heads, and just ran heater hose under the manifold insted of the metal hose that is factory.

Nicks97 · December 1st, 2008, 09:17 PM

Thats not the problem, I bet its the thermostat! 180* replacement would be the best 8$ you ever spent

97S281 · December 1st, 2008, 10:25 PM

Is it still well within the normal operating temps?

If it bothers you that much, change the thermostat again.

Lefty · December 1st, 2008, 10:39 PM

Originally Posted by 97S281

Is it still well within the normal operating temps?

If it bothers you that much, change the thermostat again.

Yeah, but it just bother's me. Over christmas break I'm gunna put her up on the lift over at the shop and look over everything top & bottom. And probably change the thermostat

hbk_136 · December 2nd, 2008, 12:50 AM

I would definitely throw in a 180* t-stat in there like he said, and make sure it has or you drill a small 1/8" hole in it to let air past even when its closed to prevent air bubbles in the system.

December 1st, 2008, 10:23 AM	#1
Lefty The Doctor '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 27,386 iTrader: 11 reviews	Cooling Issue(s)... 96' GT, 5-spd. My car used to run at the perfect normal temp. The temp gauge needle used to be right on in the middle. Now I just noticed a couple of weeks ago that it is running probably about an eighth on an inch lower from half towards the colder side. And it stays there. Even after about 30 minutes of driving. THEN...sometimes while I'm driving it'll go up to half and keep hauling ass up about another eighth of an inch ABOVE the middle towards the warm side. Doesn't go any hotter. It'll stay up there for about 30-40 seconds then go back down to the "colder" side of the gauge like I mentioned earlier. So I wouldn't say it's overheating, but it is a weird issue. Any suggestions of what could be going on here??? I put a new manifold on (w/ the aluminum crossover) because my stock manifold blew due to the shitty coolant (plastic) crossover. When I replaced the manifold about 5k miles ago I DID replace the thermostat. Any help, suggestions, or idears would be appreciated. Thanks guys! -Troy __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

December 1st, 2008, 06:33 PM	#2
NO_PI_NO_POWER Enthusiast 1997 Mustang GT 12.501@116.35 Join Date: Jul 2008 Location: Greeley, CO Posts: 655 iTrader: 0 reviews	Is the new one a PI manifold? __________________ 1997 GT 1989 LX ~Dangerously Quick/Needs Battery

December 1st, 2008, 06:43 PM	#3
Lefty The Doctor '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 27,386 iTrader: 11 reviews	No, non-pi with aluminum cross over __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

December 1st, 2008, 07:01 PM	#4
NO_PI_NO_POWER Enthusiast 1997 Mustang GT 12.501@116.35 Join Date: Jul 2008 Location: Greeley, CO Posts: 655 iTrader: 0 reviews	yeah, I couldnt tell ya. I know I had problems with my car heating when I put the PI manifold on the npi heads, and just ran heater hose under the manifold insted of the metal hose that is factory. __________________ 1997 GT 1989 LX ~Dangerously Quick/Needs Battery

December 1st, 2008, 09:17 PM	#5
Nicks97 Regular Join Date: Aug 2007 Location: Not important Posts: 60 iTrader: -1 reviews	Thats not the problem, I bet its the thermostat! 180* replacement would be the best 8$ you ever spent __________________ Due to events on here (like buying a 4000 POS Vortech V2SQ that the seals were out of) (oh, and getting screwed out of another $1000 on here in another matter) I am not gonna be around. Later!

December 1st, 2008, 10:25 PM	#6
97S281 Rollin' 18/ pushin' 2 1997 Saleen S281 Join Date: Feb 2007 Location: Zebulon N.C. Posts: 6,259 iTrader: 13 reviews	Is it still well within the normal operating temps? If it bothers you that much, change the thermostat again. __________________ MODS IN GARAGE NCMM ORIGINAL BLOWN 96-98 CREW MEMBER # 1

December 2nd, 2008, 12:50 AM	#8
hbk_136 Regular Join Date: Dec 2008 Posts: 204 iTrader: 1 reviews	I would definitely throw in a 180* t-stat in there like he said, and make sure it has or you drill a small 1/8" hole in it to let air past even when its closed to prevent air bubbles in the system.

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