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Engine runs on the cool side? #4578989
11/19/17 02:48 PM
11/19/17 02:48 PM
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Crowder1980 Offline OP
Crowder1980  Offline OP
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Long term lurker , first time poster. Howdy everybody, I have an old Toyota Camry with a 2.2 4cylinder engine , the entire car has been nothing short of phenomenal , going into another upper Midwest winter I've noticed it takes a really long time for the coolant temp needle to sit where it has for 10 years. If I drive around town stop and go it takes even longer, it seems most noticeable under 45 degrees F apx. This car has always seemed to run really cool even in 100 degree weather to where you can almost ready your hand on the exhaust manifold after summer driving with the a/c on, it has almost 200,000 miles and I've used Valvoline 5/w30 almost the entire 10 years I've had it....I'd assume the check engine light would have come on if there were a problem, am I just being paranoid?!

Re: Engine runs on the cool side? [Re: Crowder1980] #4578999
11/19/17 02:56 PM
11/19/17 02:56 PM
Joined: Nov 2011
Posts: 1,108
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,108
Lyndhurst NJ
Sounds like the thermostat is stuck open. Also, never touch the manifold while the car is running, theres no doubt in my mind that that will reach 400 degrees in no time.

Last edited by Audios; 11/19/17 02:56 PM.

2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: Engine runs on the cool side? [Re: Crowder1980] #4579013
11/19/17 03:05 PM
11/19/17 03:05 PM
Joined: Mar 2014
Posts: 451
Eleanor, West Virginia
thunderfog Offline
thunderfog  Offline
Joined: Mar 2014
Posts: 451
Eleanor, West Virginia
My 2016 4Runner is the same way in terms of warming up to full coolant temp in colder weather. Usually takes about 3-5 miles/5-7 minutes or so.

Pretty sure every comment going forward will be to not worry... you've got 200k on it doing what it's doing, so don't sweat it.


'16 4 Runner Kendall GT-1 FS 0w-20
'14 CX-5 GT AWD - QSUD 0w-20
'78 Evinrude 15HP - E/J TC-W3
Honda GCV160 - Pennzoil Ultra 10w-30
Re: Engine runs on the cool side? [Re: Crowder1980] #4579021
11/19/17 03:14 PM
11/19/17 03:14 PM
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Crowder1980 Offline OP
Crowder1980  Offline OP
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Thanks for the responses, this car asks for so little and has aged so slowly that I'm pretty in tune to how it runs, just out of curiosity can the engine computer pick up a bad thermostat? Thanks again!


2001 Camry
Re: Engine runs on the cool side? [Re: Crowder1980] #4579028
11/19/17 03:18 PM
11/19/17 03:18 PM
Joined: Mar 2007
Posts: 894
canada
hemitom Offline
hemitom  Offline
Joined: Mar 2007
Posts: 894
canada
Thermostat most likely stuck, or low on coolant.


2006 kia spectra.
2014 buick verano.
2012 mustang coupe.
Re: Engine runs on the cool side? [Re: Crowder1980] #4579032
11/19/17 03:20 PM
11/19/17 03:20 PM
Joined: Jun 2005
Posts: 11,412
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline
Joined: Jun 2005
Posts: 11,412
Santa Barbara, CA
Originally Posted By: Crowder1980
Thanks for the responses, this car asks for so little and has aged so slowly that I'm pretty in tune to how it runs, just out of curiosity can the engine computer pick up a bad thermostat? Thanks again!


Yes there will be a code for the engine not reaching operating temp.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Engine runs on the cool side? [Re: Crowder1980] #4579033
11/19/17 03:20 PM
11/19/17 03:20 PM
Joined: Mar 2017
Posts: 595
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 595
West Ma.
I"d replace the thermostat, why drive around in a cold car?


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram xg8a, Fram CA8141

Currently under the influence of oil shocked2

Re: Engine runs on the cool side? [Re: Crowder1980] #4579051
11/19/17 03:33 PM
11/19/17 03:33 PM
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Crowder1980 Offline OP
Crowder1980  Offline OP
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
I did have the radiator fluid changed, but that was like 2 years ago. Where I'm positive it was green they replaced with red fluid. (Same color as the attached fluid), but that was because the radiator hose dry cracked and leaked a lot out. It was done at a Toyota dealer , trying to find the receipt because I'm almost positive they replaced the thermostat, but like I said this was like 2 years ago.


2001 Camry
Re: Engine runs on the cool side? [Re: Crowder1980] #4579059
11/19/17 03:48 PM
11/19/17 03:48 PM
Joined: Sep 2004
Posts: 7,608
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,608
Marshfield , MA
Quick and cheap is to block the radiator with a piece of cardboard. Running cool wastes fuel. That can lead to cat trouble. The trouble with thermostats is that they all fail eventually. Buy one that can only fail open as the present one seems to have done. The quality in t'stats is iffy. I would research before replacing. Before doing anything, check the coolant level just for grins.

Last edited by andyd; 11/19/17 03:50 PM.

'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Engine runs on the cool side? [Re: Crowder1980] #4579062
11/19/17 03:51 PM
11/19/17 03:51 PM
Joined: Jan 2017
Posts: 1,558
VW Fanboy Island
maxdustington Offline
maxdustington  Offline
Joined: Jan 2017
Posts: 1,558
VW Fanboy Island
If you can view the temp with a scan tool that would be ideal. When my car had thermostat that was stuck open, it would usually sit at 72 Celsius during city commutes when the thermostat was supposed to open at 88C. You should be able to find what temperature your stock thermostat should open at in order to compare.


03 Jetta AWP/09A 205k kms
Edge 0W40 + Mann 719/30
Re: Engine runs on the cool side? [Re: Crowder1980] #4579064
11/19/17 03:51 PM
11/19/17 03:51 PM
Joined: Nov 2016
Posts: 1,280
WI
HoosierJeeper Offline
HoosierJeeper  Offline
Joined: Nov 2016
Posts: 1,280
WI
Color of coolant doesn't mean much, anyone can get any dye added to it. It's possible that the new tstat could be bad again, new ones don't last as long as OEM ones a lot of times. The CEL would come on if it takes long enough to warm up, does it still get up to temp?


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Engine runs on the cool side? [Re: Crowder1980] #4579072
11/19/17 04:02 PM
11/19/17 04:02 PM
Joined: Sep 2016
Posts: 513
Vienna, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 513
Vienna, VA
I have owned several of these engines and have one now in my mr2. Stuck thermostats are not uncommon and I'd start there. It's a pretty simple repair.


1993 Toyota MR2 Hardtop N/A - 160k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 130k miles - Valvoline Max Life 5w30
Re: Engine runs on the cool side? [Re: Crowder1980] #4579076
11/19/17 04:04 PM
11/19/17 04:04 PM
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
Crowder1980 Offline OP
Crowder1980  Offline OP
Joined: Nov 2017
Posts: 11
Ohio-Pennsylvania
It does get up to Temp as long as it's above like 2,000 RPM and 40 mph or so. Sitting at a stop light is when the needle seems to sit lower, it really isn't that cold, 45F or so, I seem to remember it doing this last winter but 90% of my driving was 70mph 5 minutes after starting the car, where as now I'm almost strictly stop and go. Turning the heater fan on high definitely drops the needle slightly. The fluid in the radiator is sitting where it always has, and no sign of leakage or odor. Cash strapped right now but I'm going to keep an eye on it.


2001 Camry
Re: Engine runs on the cool side? [Re: Crowder1980] #4579080
11/19/17 04:08 PM
11/19/17 04:08 PM
Joined: Sep 2016
Posts: 513
Vienna, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 513
Vienna, VA
Sounds like thermostat. I'd start there.


1993 Toyota MR2 Hardtop N/A - 160k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 130k miles - Valvoline Max Life 5w30
Re: Engine runs on the cool side? [Re: Crowder1980] #4579087
11/19/17 04:13 PM
11/19/17 04:13 PM
Joined: Jun 2003
Posts: 33,268
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,268
ME
The dealer most likely would not have done the thermostat when you went in for an emergency repair of a burst hose. Regardless it's broken now, eh?

Don't buy cheap.

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