Overheating??
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
Overheating??
I changed the radiator hoses & t/stat & coolant on my 350 CID. The temp sender was bad too & I changed it too.
I added a 190 t/stat.
I ran the car for about 15 minutes. The temp gauge reads 225-235
The coolant is flowing inside the radiator & it does not seem to be overheating.
How do i tell if the gauge is off or if indeed the engine is overheating?
I added a 190 t/stat.
I ran the car for about 15 minutes. The temp gauge reads 225-235
The coolant is flowing inside the radiator & it does not seem to be overheating.
How do i tell if the gauge is off or if indeed the engine is overheating?
Burning Brakes
Joined: Jul 2006
Posts: 1,108
Likes: 0
From: Sebastian Florida
You need to have the pass. front tire in the air when you fill the radiator. otherwise you could have air in the system. Would a kitchen thermometer taped to the upper hose give a correct reading?
Racer
Joined: Nov 2006
Posts: 264
Likes: 0
From: McLouth Kansas
Sir;
Where did you get your sending unit??? If you say O'riley or auto zone that is your problem.
You need to get one spec. for your year vett. call ricks vetts.
I have been thru the same delema myself and that solved the problem.
And if you still have a heat problem,,go to auto zone and get a mr gasket high perf thermostat for a 350 chev, that helped me a lot. And it even made the cabin heat much reduced, only heat problem I now have is high speed driving 70 plus the temp seems to climb. I think a air dam under the front will cure that problem, I checked the lower hose for collapsing and it is ok.
Where did you get your sending unit??? If you say O'riley or auto zone that is your problem.
You need to get one spec. for your year vett. call ricks vetts.
I have been thru the same delema myself and that solved the problem.
And if you still have a heat problem,,go to auto zone and get a mr gasket high perf thermostat for a 350 chev, that helped me a lot. And it even made the cabin heat much reduced, only heat problem I now have is high speed driving 70 plus the temp seems to climb. I think a air dam under the front will cure that problem, I checked the lower hose for collapsing and it is ok.
Last edited by Racer11; Oct 22, 2008 at 11:26 PM.
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
Well this morning I inserted a liquid temp probe that I borrowed from a mechanic friend of mine in to the radiator. The guage reads 235 at idle. The temp probe in the coolant shows 165.
I guess I now have a bad sending unit ( AC Delco part from local supply house) or a bad temp guage on the dash.
I guess I now have a bad sending unit ( AC Delco part from local supply house) or a bad temp guage on the dash.
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
You should use an IR Gun to get the correct temp reading. As previously stated, part of the problem probably is the temp sender. The temp sender is specific to your gauage. A number of things could be the cause of the overheating problem. Might have air in the system as well. Why did you go with a 190* thermostat?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
If the temp gauge is reading at all, it's probably OK. Your sending unit is not calibrated for the gauge. If the gauge is original to the car, get the correct sending unit from lectriclimited.com.
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
You should use an IR Gun to get the correct temp reading. As previously stated, part of the problem probably is the temp sender. The temp sender is specific to your gauage. A number of things could be the cause of the overheating problem. Might have air in the system as well. Why did you go with a 190* thermostat?
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
Thanks all
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Burning Brakes
Joined: Sep 2008
Posts: 805
Likes: 5
From: Naperville Illinois
You should use an IR Gun to get the correct temp reading. As previously stated, part of the problem probably is the temp sender. The temp sender is specific to your gauage. A number of things could be the cause of the overheating problem. Might have air in the system as well. Why did you go with a 190* thermostat?
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Take the temperature at the upper radiator hose near the thermostat housing. The gauge being pegged does not look good either. Do a search because someone posted a real good way of checking the gauge without removing it. Or maybe it was the sender. Not sure. It appears as though you have the proper temperature but an issue with either the sender, the gauge or both. Maybe someone can help with providing a simple way to test the gauge to isolate the problem.
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
just an update in case anyone else needs this in the future,
I ordered a sending unit from lectriclimited.com
Installed it today & the temp gauge reads 180-200 degrees. I drove the car for 20 minutes & the reading was constantly between 180-200.
Good call 7T1VETTE
I ordered a sending unit from lectriclimited.com
Installed it today & the temp gauge reads 180-200 degrees. I drove the car for 20 minutes & the reading was constantly between 180-200.
Good call 7T1VETTE
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09
Thread Starter
Racer
Joined: Sep 2007
Posts: 383
Likes: 0
From: Roseville CA
St. Jude Donor '09