Hot coolant temp
Thread Starter
Instructor
Joined: Jan 2007
Posts: 203
Likes: 0
Hot coolant temp
OK this is strange. driving home from son's football game, looked down and the engine temp (gauge) was zero...the DIC had XXXcoolant temp.
The oil temp is 140 per the DIC. I was appx 5 miles from my office, so I kept going with the thought that if the engine truly was hot/overheating, that the oil temp would begin to increase in temp...and it didn't at all. Got to office, and hoses all good, none super hot, no steaming...etc.
I checked the sensor. Fine. Even changed the sensor and still same thing.
Suggestions?
The oil temp is 140 per the DIC. I was appx 5 miles from my office, so I kept going with the thought that if the engine truly was hot/overheating, that the oil temp would begin to increase in temp...and it didn't at all. Got to office, and hoses all good, none super hot, no steaming...etc.
I checked the sensor. Fine. Even changed the sensor and still same thing.
Suggestions?
Last edited by DocT; Oct 27, 2012 at 06:18 PM.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
Im doing the 160 stat too and have read that you need to make sure no air pockets get in the lines which will mean not enough coolant and places that will get hot. Some say they blow into hose to force air out and some start car while refilling.
Thread Starter
Instructor
Joined: Jan 2007
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Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Start as low in the system as you can and work towards the recovery tank.
Run the engine every so often to circulate the coolant too.
Repeat a few times. The coolant should go down if indeed you had a air pocket, so you will have to top off.
Run the engine every so often to circulate the coolant too.
Repeat a few times. The coolant should go down if indeed you had a air pocket, so you will have to top off.
Team Owner
Joined: Sep 2000
Posts: 25,009
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
The DIC reading for coolant temp seems to have no lower limit, if it's 20'F in my garage when I start the car then the DIC will show 20. So even if there is air in the system, it should still be showing some kind of temp.
Melting Slicks
Joined: Jun 2012
Posts: 2,226
Likes: 1,029
From: Thomas Texas
I took out my 160° 'stat because it allowed wide temp swings and its not good for the engine. At cruise, coolant temp would drop to ~180° then in stop and go, it would go up to 203-210°. Oil temp with the 160° 'stat would stay 190°-200° which does not boil off water that accumulates in the oil. If you install a 160° 'stat, you have to crank up the fans below 190° which shortens their life and cause the connector to melt and the fans to stop altogether. None of this is healthy on the motor.
I put in a 186° 'stat from Stant for $13 and it stays right in the 200°-203° range and the oil temp stays in the 220° range. I consider this perfect.
For the majority Corvette owners, they should keep a stock 'stat. Guys that build race cars where every last HP is important may want a 160° but for street cars, I suggest to leave it alone.
I put in a 186° 'stat from Stant for $13 and it stays right in the 200°-203° range and the oil temp stays in the 220° range. I consider this perfect.
For the majority Corvette owners, they should keep a stock 'stat. Guys that build race cars where every last HP is important may want a 160° but for street cars, I suggest to leave it alone.
SUBVETTE
Joined: Jul 2006
Posts: 3,841
Likes: 93
From: San Diego CA
There should be some reading, regardless of your tstat change. The new sensor you installed may be bad, or the connection to it. You apparently had a reading after the tstat installation which later on disappeared.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
well I put my stock t stat back in today and filled up with coolant, about 1 1/4 gallons so far. Took out more than that. Temps stay over 200 and I know its just an air pocket somewhere. I massage the lines, turn heater on full blast, take tank cap off and I just cant get to that pocket. I even took the hose off the tank and blew into it and heard gurggling but the coolant didnt go any lower. Up for suggestions. Thanks.
Do we have a bleeder spot? If ao where is it located?
Do we have a bleeder spot? If ao where is it located?
Last edited by S'vette; Oct 29, 2012 at 11:43 PM.