| Re: [GMCnet] Oil line temperature [message #301732] |
Mon, 06 June 2016 20:41  |
Tom Whitton
Messages: 235
Registered: February 2004
Location: Paducah, KY
Karma: 0
|
Senior Member |
|
|
I still running the break-in oil with about 500 miles on the rebuild. Using my infrared laser thermometer, I checked the temp this afternoon of my oil lines after a highway test run. With the engine still idling, I checked both lines at the fitting connection point where the solid lines connect with the flex lines. The upper line's temp (leading to the upper connection on the radiator oil cooler) was 188 degrees F. The lower line temp (leading to the lower connection on the radiator oil cooler) was 195 degrees. I was surprised that the lower line temp was more than the upper line. Is this normal?
Appreciate your input,
Tom Whitton
26 foot updated GMC
Paducah, KY
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] Oil line temperature [message #301747 is a reply to message #301732] |
Mon, 06 June 2016 22:11  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
What was the radiator temp, did you look at it? The return line should be about the same as the coolant temp I think. The send line will be about the temp of the oil in the pan. I wouldn't think a 7 degree difference would be a concern either way.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
|
|
| Re: [GMCnet] Oil line temperature [message #301842 is a reply to message #301732] |
Wed, 08 June 2016 11:29 |
Tom Whitton
Messages: 235
Registered: February 2004
Location: Paducah, KY
Karma: 0
|
Senior Member |
|
|
Emery,
Thanks for the information. Understood, however, I am running a 180 degree thermostat. It was a warm day and the coach was in the garage with no air circulation.
Tom Whitton
26 foot updated GMC
Paducah, KY
Message: 12
Date: Wed, 08 Jun 2016 09:49:07 -0600
From: Emery Stora
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Oil line temperature
Message-ID:
Content-Type: text/plain; charset=utf-8
Tom
The upper line is the one going from the filter to the oil cooler in the radiator. The lower line is the return line.
Normally you would expect the upper line to be hotter however at idle the flow rate of the oil is lower and the air flow going through the radiator is lower.
So it is possible times for the oil to pick up heat from the radiator coolant. At a higher RPM the temperatures could easily be reversed.
A 7 degree difference isn?t much and certainly nothing to be concerned about.
Your thermostat is likely 195 degrees so you coolant temperature was probably hotter than the engine oil temperature.
Emery Stora
77 Kingsley
Frederick, CO
> On Jun 6, 2016, at 7:41 PM, Tom Whitton wrote:
>
> I still running the break-in oil with about 500 miles on the rebuild. Using my infrared laser thermometer, I checked the temp this afternoon of my oil lines after a highway test run. With the engine still idling, I checked both lines at the fitting connection point where the solid lines connect with the flex lines. The upper line's temp (leading to the upper connection on the radiator oil cooler) was 188 degrees F. The lower line temp (leading to the lower connection on the radiator oil cooler) was 195 degrees. I was surprised that the lower line temp was more than the upper line. Is this normal?
>
> Appreciate your input,
>
> Tom Whitton
> 26 foot updated GMC
> Paducah, KY
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] Oil line temperature [message #301843 is a reply to message #301842] |
Wed, 08 June 2016 11:33 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
Even with a 180 degree thermostat the radiator can run hotter than that. The thermostat is just a valve that opens at 180. The temperature of the fluid going through it can be hotter.
On a hot day and no air circulation I am not surprised at the oil being 195.
Emery Stora
> On Jun 8, 2016, at 10:29 AM, Tom Whitton wrote:
>
> Emery,
>
> Thanks for the information. Understood, however, I am running a 180 degree thermostat. It was a warm day and the coach was in the garage with no air circulation.
>
> Tom Whitton
> 26 foot updated GMC
> Paducah, KY
>
> Message: 12
> Date: Wed, 08 Jun 2016 09:49:07 -0600
> From: Emery Stora
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Oil line temperature
> Message-ID:
> Content-Type: text/plain; charset=utf-8
>
> Tom
> The upper line is the one going from the filter to the oil cooler in the radiator. The lower line is the return line.
> Normally you would expect the upper line to be hotter however at idle the flow rate of the oil is lower and the air flow going through the radiator is lower.
> So it is possible times for the oil to pick up heat from the radiator coolant. At a higher RPM the temperatures could easily be reversed.
>
> A 7 degree difference isn?t much and certainly nothing to be concerned about.
> Your thermostat is likely 195 degrees so you coolant temperature was probably hotter than the engine oil temperature.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
>> On Jun 6, 2016, at 7:41 PM, Tom Whitton wrote:
>>
>> I still running the break-in oil with about 500 miles on the rebuild. Using my infrared laser thermometer, I checked the temp this afternoon of my oil lines after a highway test run. With the engine still idling, I checked both lines at the fitting connection point where the solid lines connect with the flex lines. The upper line's temp (leading to the upper connection on the radiator oil cooler) was 188 degrees F. The lower line temp (leading to the lower connection on the radiator oil cooler) was 195 degrees. I was surprised that the lower line temp was more than the upper line. Is this normal?
>>
>> Appreciate your input,
>>
>> Tom Whitton
>> 26 foot updated GMC
>> Paducah, KY
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
