Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-20-2013, 07:09 PM   #1
"Alumi-holic"
 
cesalie2's Avatar
 
1982 31' Airstream 310
Memphis , Tennessee
Join Date: Jan 2011
Posts: 406
Images: 4
1982 Classic with 454 Engine Question

My best friend Dudley has a 1982 Airstream 310 with a chevy 454 engine. Currently his water temperature runs about 218 degrees. Note: in comparison our 310 runs about 180 degrees.

So, here is his question...if he removes the thermostat...will his gas mileage decrease, increase, or remain the same?

Inquiring minds would like to know!

Thank you,

Daniel
__________________

__________________
cesalie2 is offline   Reply With Quote
Old 08-20-2013, 07:22 PM   #2
Rivet Master
 
Naper's Avatar
 
2017 30' Classic
Loretto , Ontario
Join Date: Oct 2010
Posts: 504
Removing the thermostat will not improve the mileage if anything it will take longer for the engine to warm up using more gas.
Thermostat ratings are for the lowest temp not highest. In other words a 180 thermostat will allow the engine to run warmer than 180 but not colder.
__________________

__________________
Naper is offline   Reply With Quote
Old 08-20-2013, 07:26 PM   #3
Rivet Master
 
Steve Bryant's Avatar

 
1991 34' Limited
Wichita , Kansas
Join Date: Nov 2008
Posts: 739
Images: 7
I suspect that his temp should be regulating somewhere between 180 and 200 even with a thermostat installed. I would say that he has one or more of the following problems:
1. Thermostat is sticking partially closed (insufficient coolant flow).
2. Radiator is getting plugged up (inadequate heat exchange in radiator).
3. Fan clutch or shroud are defective (insufficient air through radiator).
4. Temperature indicating system is inaccurate.
5. Coolant level is low (insufficient coolant).

I've tried to list these in the order of most likely to least likely. Low coolant level is really a prime candidate, but I assume that this has already been checked.

It's not a good idea to run an engine without a thermostat except for a short period (like to test the thermostat) but that can be done more easily by sticking the thermostat in a pot of water on the stove with a thermometer in the water. That way you can watch the thermostat open at its approximate design open temp (stamped on the thermostat). If I removed the thermostat and it was very old at all, I'd just stick a new one in it with a new gasket and call it good.

The reason one shouldn't run without a thermostat is that the engine is efficient and runs with the least friction at its design regulated temperature. Running too hot is no good, because it shortens engine life, reduces power, can cause vapor lock in a carbureted engine like this one, can cause detonation, etc.

BTW, I would probably run a 180 degree thermostat in this engine.

Steve
__________________
Steve Bryant is offline   Reply With Quote
Old 08-20-2013, 07:28 PM   #4
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up

Dan,

All things being equal, remain the same.

What advantage removing the 'stat?.....none Check and replace if needed. (stainless, if you can find one)

The quicker the engine warms on a cold start the better.

Back flush & flow check the cooling system.

Bob
__________________
PFC.....

“After all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.”
RLC

Sandra wanted to go to Cleveland on vacation,
but I’m the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 08-20-2013, 09:02 PM   #5
"Alumi-holic"
 
cesalie2's Avatar
 
1982 31' Airstream 310
Memphis , Tennessee
Join Date: Jan 2011
Posts: 406
Images: 4
All,


Many thanks for your timely responses.

Dudley is concerned as we are planning a 5 day trip next month...

Daniel
__________________
cesalie2 is offline   Reply With Quote
Old 08-20-2013, 09:34 PM   #6
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 5,936
Images: 2
The opening temp should be stamped on the tstat.

Get a pot with enough water to submerge tstat and a candy thermometer.

Heat water to "open" temp. Drop tstat in. Within seconds you should see the tstat valve open. If it doesn't, it's defective.

Use same process to verify NEW one works at stamped value.

If tstat opening at 180 as it should, problem is elsewhere and should be fixed before trip, or... You may mess up motor.
__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is offline   Reply With Quote
Old 08-20-2013, 10:11 PM   #7
Rivet Master
 
bwoodtx's Avatar
 
1997 30' Excella
1961 26' Overlander
1954 22' Flying Cloud
1981 28' Airstream 280
San Antonio , Texas
Join Date: Jul 2009
Posts: 1,365
In addition to everything noted above, removing the thermostat will actually make the engine run hotter. This because by removing the t-stat you do not allow the coolant to cool through the radiator. With a good, clean system and a 50/50 coolant mixture and the proper pressure cap you should have a 15-20 degree drop in temp from the top hose to the bottom hose. This can easily be checked with an infrared temp gun. BTW are you sure the gauge is accurate?
__________________
Bruce
WBCCI# 9259 AIR# 38927 TAC-TX 14
Stop Littering-Spay & Neuter-- Adopt From Rescue
He is your friend, your partner, your defender, your dog. You owe it to him to be worthy of such devotion.
bwoodtx is offline   Reply With Quote
Old 08-20-2013, 10:51 PM   #8
Rivet Master
 
garry's Avatar
 
1969 31' Sovereign
Broken Arrow , Oklahoma
Join Date: Jan 2003
Posts: 1,362
Images: 7
It may even run hotter, without a thermostat. Even at wide open the thermostat slows the fluid flow through the radiator allowing better cooling.

If he has an AC it could be trash between the engine radiator and the AC condenser.
__________________
Garry
garry is offline   Reply With Quote
Old 08-20-2013, 11:18 PM   #9
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 5,936
Images: 2
Check for bad airflow too. Just like Garry says. Saw a pickup that had a mass of straw between radiator and condenser. Nearly no airflow. He had "tried everything". Also found the fan was not working right as the clutch failed.

We replaced with electric fan. Gave better AC function and ten drop if coolant thru the radiator.

Good luck!!!
__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is offline   Reply With Quote
Old 08-22-2013, 03:14 PM   #10
4 Rivet Member
 
Robfike's Avatar
 
1986 34.5' Airstream 345
Speedway , Indiana
Join Date: Dec 2005
Posts: 421
I believe all of our Classics should be running the 195 degree stat.
__________________
Robfike is offline   Reply With Quote
Old 08-30-2013, 02:14 PM   #11
"Alumi-holic"
 
cesalie2's Avatar
 
1982 31' Airstream 310
Memphis , Tennessee
Join Date: Jan 2011
Posts: 406
Images: 4
Dudley followed the forum advice and measured the temp with the temp gun...195 degrees. Gauge read 220.

He said he would change the temp sensor first and measure again.

Thanks to all the forum contributors!
__________________
cesalie2 is offline   Reply With Quote
Old 08-30-2013, 02:17 PM   #12
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 5,936
Images: 2
Yeee haw!
__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is offline   Reply With Quote
Old 08-30-2013, 02:39 PM   #13
Rivet Master
 
DaveFL's Avatar
 
2000 31' Land Yacht
Central , Florida
Join Date: Aug 2007
Posts: 1,479
Images: 15
I changed my sensor got same reading, checked thermostat works, now I know gauge is wrong so don't worry about it, if it moves up then I will know I have problems. lol
__________________

__________________
DaveFL is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:08 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.