| Coolant Temps [message #225704] |
Tue, 15 October 2013 07:04  |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Is 205 degrees coolant temp while cruising on flat highway too hot?
Outside air in the low to mid 80's, not towing.
T Stat 190.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: Coolant Temps [message #225705 is a reply to message #225704] |
Tue, 15 October 2013 07:13  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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| Oldngray wrote on Tue, 15 October 2013 07:04 |
Is 205 degrees coolant temp while cruising on flat highway too hot?
Outside air in the low to mid 80's, not towing.
T Stat 190.
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It's not TOO hot but if everything was in good shape, I'd expect it to be about thermostat rating in the conditions you describe.
My 77 403 with the aluminum radiator runs right on the thermostat rating unless I'm on a long pull (usually towing about 3500 lbs)
I'd suspect a partially blocked radiator. You can check for that with an Infra-Red heat gun. Also, rubber flaps on the side and bottom of the grill opening will direct more ambient air through the radiator.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: Coolant Temps [message #225761 is a reply to message #225704] |
Tue, 15 October 2013 16:52 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
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Ours has always run right at the T stat setting too, even on the trip to get the FD changed out from 307 to 370, On the way home now the temp runs at 205. The Radiator has no blockage and the coolant is fresh and at the right level. Wondering if the fan clutch started to go just at the same time the FD was changed out. Spun the fan blade by hand while the engine was cold and hot and it only moves about 1/4 turn and stops. Seems ok to me.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: Coolant Temps [message #225763 is a reply to message #225704] |
Tue, 15 October 2013 17:25 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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If 205 is actual.
I would check to see if it reads that at idle as well as cruse.
There is a possibility that your fan clutch might not be functioning too well.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Coolant Temps [message #225767 is a reply to message #225761] |
Tue, 15 October 2013 18:07 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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it is also posible that the gauge is 15 degrees out of calibration.I would check the temperature of the thermostat housing,the gauge sender and the upper radiator with a temperature gun before I got too excited.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Coolant Temps [message #225774 is a reply to message #225704] |
Tue, 15 October 2013 19:02 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
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From cold start the T stat opens at 190+_ and the temp drops to about 175 very quickly,( this would indicate to me that the T stat opened as it should,) then climbs slowly to 190+_ and pretty much stays there at Idle. If I rev to 2500 rpm the temp rises to about 195 and stays.
While driving I find at 2850 rpm the temp stays at 205, At 2500
the temp is 195-200.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: Coolant Temps [message #225779 is a reply to message #225774] |
Tue, 15 October 2013 19:07 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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I will check the temps tomorrow with the gun, however, like I mentioned earlier, the gauge has always been steady at 185-190
since I purchased the Coach 4 years ago.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: Coolant Temps [message #225839 is a reply to message #225704] |
Wed, 16 October 2013 12:46 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Checked the temp at the sending unit today 189-190 vs the gauge reading 185 not too far off
The PO left several spares in the Coach, one is a GM fan clutch still in the Box, P/N 4367. Cannot find this number anywhere on the forum. Anyone know if this is a good number?
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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