Recent Topics
Meijer October ad 10/2 through 10/22
by a1mfw
Today at 05:17 AM
Meijer 2 day sale 9/30 and 10/1
by a1mfw
Today at 05:10 AM
M1 HM Canadian Tire, M1, PYB, Regane
by Garak
Today at 02:59 AM
Ceramic pads optimal in -20 fahrenheit winter?
by Bikeman
Today at 01:02 AM
Can we now agree that Fram is the best?
by cheesepuffs
Yesterday at 09:40 PM
Damaged Filters?
by dx92beater
Yesterday at 09:37 PM
Math pros, please help me measure my consumption.
by dx92beater
Yesterday at 09:22 PM
Advance Auto Parts 'Experts' Rant
by krismoriah72
Yesterday at 08:52 PM
Walmart Canada QSGB $2.77 a quart
by Run
Yesterday at 08:14 PM
Swepco MolyXP 75w90 Synthetic Gear Lube
by Hullthumper
Yesterday at 08:09 PM
Brake Drums Warped Out of Box..Part 2
by CapitalTruck
Yesterday at 07:52 PM
PF 63E, 2015 Chevy Silverado, 6,xxx miles CUT OPEN
by car51
Yesterday at 07:22 PM
Newest Members
Wally3626, lancelot50, arthur88boston, cbuck, lwralaVTC92
59218 Registered Users
Who's Online
44 registered (Alex_V, beanoil, 2015_PSD, AirgunSavant, 09_GXP, Al, 4 invisible), 1029 Guests and 16 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
59218 Members
66 Forums
255082 Topics
4190487 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#1929953 - 06/21/10 09:42 PM What is the coolant reservoir for?
dsmith41 Offline


Registered: 03/25/08
Posts: 733
Loc: Kansas City Metro
That is probably a stupid question but I have had two Ford Rangers and the coolant reservoirs in both were always empty but I have never had any cooling problems. My Impala on the other hand, seems to be over filled. It is above the hot line when the engine is warm. Can this be harmful? One of my local shops filled it recently when they fixed a coolant leak.

As long as the actual radiator is filled to capacity, what is the clear plastic reservoir for?
_________________________
1995 Ford Ranger 2.3L
2001 Chevy Impala 3800
1980 Wheel Horse C-145 8 Speed


Top
#1929959 - 06/21/10 09:48 PM Re: What is the coolant reservoir for? [Re: dsmith41]
simple_gifts Offline


Registered: 07/26/04
Posts: 10981
Loc: Middlesex County CT
hot fluid expands.
_________________________
2003 Echo > 4.0x10^5 miles; 0W-40
2006 B2300;108K;ALM

Please conserve paper; it is not like it grows on trees.

Top
#1929961 - 06/21/10 09:50 PM Re: What is the coolant reservoir for? [Re: dsmith41]
beast3300 Offline


Registered: 12/24/09
Posts: 3131
Loc: Ohio
For expansion and reserve. When the coolant is hot it expands. The radiator cap keeps the pressure in the radiator to a specified amount, the rest pushes into the overflow.

When the engine coolant cools down, the coolant is drawn back into the radiator as the fluid contracts.
_________________________
'03 Regal GS L67 3.29 GR, 3inch DP: PP 5w30/FU3980

'99 Grand Prix L36: QS Defy 5w30/ProSelect 21040, Filtermag


Top
#1930006 - 06/21/10 10:25 PM Re: What is the coolant reservoir for? [Re: simple_gifts]
Bill in Utah Offline



Registered: 11/11/02
Posts: 12829
Loc: UT
Originally Posted By: simple_gifts
hot fluid expands.



ding... we have a winner! happy

And on your Fords make sure you have some coolant ALWAYS in the reservoir!

Top
#1930029 - 06/21/10 10:49 PM Re: What is the coolant reservoir for? [Re: Bill in Utah]
Garak Offline


Registered: 12/05/09
Posts: 19275
Loc: Regina, Saskatchewan, Canada
Originally Posted By: Bill in Utah
ding... we have a winner! happy

And on your Fords make sure you have some coolant ALWAYS in the reservoir!


Ding ding! Another winner. All the older Fords that I've had (or have) with those big, boxy reservoirs always seem to go low over time. They simply do not seal well and there's always evaporation.

Originally Posted By: dsmith41
That is probably a stupid question but I have had two Ford Rangers and the coolant reservoirs in both were always empty but I have never had any cooling problems.


See my comment above. What years are the Rangers?
_________________________
Plain, simple Garak.

2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Wix 51358
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

Top
#1930197 - 06/22/10 05:29 AM Re: What is the coolant reservoir for? [Re: dsmith41]
Char Baby Offline


Registered: 05/25/05
Posts: 8651
Loc: Western NY
Originally Posted By: dsmith41
That is probably a stupid question but I have had two Ford Rangers and the coolant reservoirs in both were always empty but I have never had any cooling problems. My Impala on the other hand, seems to be over filled. It is above the hot line when the engine is warm. Can this be harmful? One of my local shops filled it recently when they fixed a coolant leak.

As long as the actual radiator is filled to capacity, what is the clear plastic reservoir for?


Overflow!
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-NEW
'06 Mazda 3i 2.0L-Pre Owned
'15 Nissan Altima 2.5 SV-CPO
Still looking for a car for my wife(new, used, CPO)

Top
#1930599 - 06/22/10 01:02 PM Re: What is the coolant reservoir for? [Re: Garak]
Andrew MKZ Offline


Registered: 10/04/09
Posts: 2811
Loc: USA
Originally Posted By: Garak


Ding ding! Another winner. All the older Fords that I've had (or have) with those big, boxy reservoirs always seem to go low over time. They simply do not seal well and there's always evaporation.




+1
_________________________
2010 Lincoln MKZ
23,500 miles

Formerly DT466E_bus

Top
#1930784 - 06/22/10 04:07 PM Re: What is the coolant reservoir for? [Re: Andrew MKZ]
dsmith41 Offline


Registered: 03/25/08
Posts: 733
Loc: Kansas City Metro
My current Ranger is an 05 FX4 and I used to have a 1996 reg cab shortbed 5 speed.

I have some Peak Lifetime Global 50/50 in my garage that I think I will top it off with tonight. It says it's universal so I'm going to assume it will be okay with the Motorcraft Gold. It shouldn't take much anyway.
_________________________
1995 Ford Ranger 2.3L
2001 Chevy Impala 3800
1980 Wheel Horse C-145 8 Speed


Top
#1930796 - 06/22/10 04:22 PM Re: What is the coolant reservoir for? [Re: dsmith41]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
It is a good idea to keep the Impala's reservoir a little overfilled to help insure air does not get drawn back into the radiator. Older cars didn't have reservoirs and ran a little low in the radiator until warmed up and at lower pressure. A reservoir is better and a pressurized reservoir is better still especially with modern coolants.

Top