Recent Topics
2008 F150 2wd Lariat crew cab tire thoughts
by George Bynum
06/26/16 07:10 AM
New Supertech jugs?
by dlundblad
06/26/16 06:16 AM
Fram ph3657 cut open
by jhellwig
06/26/16 05:07 AM
Don't discount coal for a long while yet...
by Shannow
06/26/16 03:10 AM
Decent Wireless Computer Headset?
by 99Saturn
06/25/16 11:41 PM
Need Fuel Pump Assembly for Camry
by Nick1994
06/25/16 11:36 PM
2015 Accord V6 VCM engine UOA 36,680 mi / 9812 OCI
by TNM1982
06/25/16 10:55 PM
Why did Toyota recommend a winter and summer oil?
by BrianApp
06/25/16 10:00 PM
Fram TG 7317 6k miles
by bbhero
06/25/16 09:57 PM
Sta-Lube Moly-Graph Grease
by JHZR2
06/25/16 09:20 PM
Dead battery locks me out of Altima!
by Tom NJ
06/25/16 08:56 PM
Second lawn mower blade
by greasegunn
06/25/16 08:11 PM
Newest Members
paul2005tb, Martyaus, carmelo, Shellman, SSO
58272 Registered Users
Who's Online
73 registered (Bandito440, beanoil, 123Saab, A310, AandPDan, alcyon, 10 invisible), 1536 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58272 Members
66 Forums
250823 Topics
4111009 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 1 of 3 1 2 3 >
Topic Options
#3127832 - 09/17/13 05:49 PM Temp issues again
ram_man Offline


Registered: 03/15/13
Posts: 2705
Loc: southern mo
So I replaced the thermostat in the saturn sl2. It's a 188 thermostat.
Today about 70 degrees the car was running down the highway 70-75 mph and the scanner is reading between 172-183. Then pulling into the store the car was at 172

As soon as I parked i grabbed both hoses. The lower hose (hose with the thermostat) was warm but the top hose was so hot you couldn't hold it. A pretty noticeable temp difference between the two hoses.
The car sitting quickly went up to 190 and the lower hose started to get Warmer. It seems like running down the road it isn't warming up enough to open the stat.
What gives? I don't understand an over cooling position. I mean how can it be cooler than the t stats opening temp range. Any ideas?
_________________________
2015 dodge dart se rallye package
1995 Dodge ram 1500 5.9l
2003 chrysler pt cruiser



Top
#3127837 - 09/17/13 05:54 PM Re: Temp issues again [Re: ram_man]
Clevy Offline


Registered: 11/11/10
Posts: 9782
Loc: Saskatoon canada
T-stat in backwards?
_________________________
2006 Charger RT
Miles x 2 per oil filter

Top
#3127850 - 09/17/13 06:09 PM Re: Temp issues again [Re: ram_man]
ram_man Offline


Registered: 03/15/13
Posts: 2705
Loc: southern mo
You can't put these in backwards .
_________________________
2015 dodge dart se rallye package
1995 Dodge ram 1500 5.9l
2003 chrysler pt cruiser



Top
#3127852 - 09/17/13 06:10 PM Re: Temp issues again [Re: ram_man]
Warstud Offline


Registered: 09/02/05
Posts: 3977
Loc: MIchigan
The upper rad hose will be hotter than the lower rad hose. The heat transfers from the engine to the coolant thru the upper hose to the radiator. Once in the radiator the coolant transfers heat to the fins and exits out the lower hose.

Top
#3127864 - 09/17/13 06:19 PM Re: Temp issues again [Re: ram_man]
spasm3 Online   content


Registered: 05/30/10
Posts: 6291
Loc: out there
177-183, I don't think you have a problem. Thermostats do not regulate temperature that precisely. If its within 10 degress, i'd be okay with it. Running down the road, its a small engine , aluminum block and cools easily.
_________________________
13 elantra 46k 5w30 ultra
03 chevy avalanche67k pyb
02 saturnsc1 66k 0w40 castrol
01 saturnsc1 185k being rebuilt
93 ciera 79k 5w30 havo

Top
#3127886 - 09/17/13 06:41 PM Re: Temp issues again [Re: ram_man]
Boomer Offline


Registered: 09/19/08
Posts: 1803
Loc: Pennsylvania
That temp difference is why upper hoses often fail long before the lower hose.
_________________________
2003 Saturn L 300 128,200 miles
2013 VW Passat TDI SE, 31,600 miles
2014 VW Jetta TDI SportWagen 17,300 miles

Top
#3127894 - 09/17/13 06:49 PM Re: Temp issues again [Re: ram_man]
Errtt Offline


Registered: 11/14/10
Posts: 2389
Loc: California
I've had new stats that didn't work well.
Is 188 the recommended stat?

Also keep in mind the coolant needs enough time in the radiator to cool. I've seen folks remove the stat and it worked out well, while some had the coolant pass through the radiator to fast and caused problems. Water pump impeller condition, rad core etc.
It needs flow but also need time in the rad to cool too.
Many will buy & use OEM stats to try and avoid problems.
I also like to replace the rad cap (and clean the fill neck) when I do a stat job.


Edited by Errtt (09/17/13 06:57 PM)

Top
#3127906 - 09/17/13 07:01 PM Re: Temp issues again [Re: spasm3]
JHZR2 Offline



Registered: 12/14/02
Posts: 38093
Loc: New Jersey
Originally Posted By: spasm3
177-183, I don't think you have a problem. Thermostats do not regulate temperature that precisely. If its within 10 degress, i'd be okay with it. Running down the road, its a small engine , aluminum block and cools easily.


I'd say this is probably the right point. IIRC the OBD reading on our "cooler" cars is 182-ish in the heat of the summertime. So 177 is probably within the realm of correct.

Ive heard many times that folks should test a t-stat in a pot of water first to ensure it opens at the right temp and correctly. Apparently there are many duds. Its only because good due dilligence is being done here that we are even talking about it.

Top
#3127985 - 09/17/13 08:06 PM Re: Temp issues again [Re: ram_man]
MONKEYMAN Offline


Registered: 06/24/04
Posts: 1666
Loc: St. Louis
Where is your temp gauge after thermostat replacement? Should be 1/8 inch or so to right of the quarter mark. Two OEM and one Stant in my Saturn put temp gauge in that general area when engine was warm.
_________________________
Truth alone triumphs, not untruth.

Top
#3128072 - 09/17/13 09:07 PM Re: Temp issues again [Re: ram_man]
ram_man Offline


Registered: 03/15/13
Posts: 2705
Loc: southern mo
It's always right above the 1/4 mark by maybe one needle thickness. Sometimes it's almost on the 1/4 mark.

Call me crazy but how can 172 be ok? That's Almost 20 degrees off. Another thing I noticed is the long term fuel trim are around -4 they used to be -16 - -18

My gas mileage is averaging. 29 and it used to avg 33 or so.
_________________________
2015 dodge dart se rallye package
1995 Dodge ram 1500 5.9l
2003 chrysler pt cruiser



Top
#3128073 - 09/17/13 09:09 PM Re: Temp issues again [Re: ram_man]
TechnoLoGs Offline


Registered: 04/03/13
Posts: 2606
Loc: Call it NNJ
Originally Posted By: ram_man
So I replaced the thermostat in the saturn sl2. It's a 188 thermostat.
Today about 70 degrees the car was running down the highway 70-75 mph and the scanner is reading between 172-183. Then pulling into the store the car was at 172

As soon as I parked i grabbed both hoses. The lower hose (hose with the thermostat) was warm but the top hose was so hot you couldn't hold it. A pretty noticeable temp difference between the two hoses.
The car sitting quickly went up to 190 and the lower hose started to get Warmer. It seems like running down the road it isn't warming up enough to open the stat.
What gives? I don't understand an over cooling position. I mean how can it be cooler than the t stats opening temp range. Any ideas?


Head gasket?

I'm serious.. any signs other than temp difference? (Can say a lot)
_________________________
1993 Chevrolet S-10 Blazer 4.3, the Frankenblazer - 184,440mi. 10/22/13 - WPP Supertech 10W-40
12,359 10/22 12,361 10/23 12,365 10/24 12,369 10/25

Top
#3128081 - 09/17/13 09:13 PM Re: Temp issues again [Re: ram_man]
ram_man Offline


Registered: 03/15/13
Posts: 2705
Loc: southern mo
Nope the car is rock solid. Honesty I'm wondering kind of a stretch but maybe the radiator and water pump both are newer are improved over the originals and offer better flowing characteristics. My honda does not fluctuate more than 4 degrees the Saturn is 10-12 degree swings. It's weird.
_________________________
2015 dodge dart se rallye package
1995 Dodge ram 1500 5.9l
2003 chrysler pt cruiser



Top
#3128137 - 09/17/13 10:16 PM Re: Temp issues again [Re: ram_man]
The_Eric Offline


Registered: 03/31/10
Posts: 4735
Loc: Iowa
Did you use an OE stat?
_________________________
2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M

Top
#3128162 - 09/17/13 10:57 PM Re: Temp issues again [Re: ram_man]
ram_man Offline


Registered: 03/15/13
Posts: 2705
Loc: southern mo
Used a napa the local gm dealer couldn't get the gm stat for it.
_________________________
2015 dodge dart se rallye package
1995 Dodge ram 1500 5.9l
2003 chrysler pt cruiser



Top
#3128279 - 09/18/13 06:27 AM Re: Temp issues again [Re: ram_man]
meep Offline


Registered: 02/20/07
Posts: 2930
Loc: Southeast
ever tested a stat? they are supposed to be fully open at the rated temp. they start to crack open before.

being that the cold hose was still cold, it sounds like it was just cracked open, letting small flow through.

i think this is ok. if you had a bigger load on the engine, the temps would creep up some more.

also, as stated above, I would totally understand being off by a few degrees, too. these systems are not "precision."
_________________________
2006 Tundra 2wd
2002 MDX (wifey!)
2005 s60 2.4L

Top
Page 1 of 3 1 2 3 >