Recent Topics
Synerlec and warranty
by jk_636
16 minutes 57 seconds ago
Where to buy Volvo S40 brake pads & rotors?
by Ed_Flecko
29 minutes 23 seconds ago
Why different starters?
by GreeCguy
46 minutes 25 seconds ago
Texas CHL holders
by aquariuscsm
Today at 02:31 PM
Chris King RingDrive substitute?
by nthach
Today at 12:08 PM
When to fill up?
by RamFan
Today at 11:46 AM
USPS tracking
by Dr_No
Today at 11:29 AM
2013 Grand Cherokee 5.7 Hemi OCI
by jeepman3071
Today at 10:50 AM
New to me 2008 Scion tC
by ThirdeYe
Today at 09:53 AM
Why Direct Injection Develop Carbon Deposits
by CELICA_XX
Today at 09:31 AM
Found a Repair Manual Site - LEGIT??
by SumpChump
Today at 09:30 AM
Drilling hole in front strut mount bigger.
by MobilinHyundia
Today at 09:28 AM
Newest Members
diematrix5000, sarswimmer1, oldmustangs, CristianJulio, 2010Forte
52674 Registered Users
Who's Online
99 registered (29662, 911Don, 1foxracing, 4wheeldog, 147_Grain, 7 invisible), 1738 Guests and 145 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52674 Members
66 Forums
225779 Topics
3593331 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: 732
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: 9386
Loc: Middlesex County CT
hot fluid expands.
_________________________
2003 Echo >353K miles;ALM
2006 B2300;90K;ALM

No one is useless in this world who lightens the burdens of another. C. Dickens

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


Registered: 12/24/09
Posts: 3037
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: PUP 5w30/XG3980, Filtermag

'99 Grand Prix L36: QS Dexos blend 5w30/PF47 Classic, 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: 12788
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: 11975
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 51356
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: 7847
Loc: Rochester 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"

1980 Firebird FORMULA V8-NEW
2001 Lexus RX-300 V6-NEW
2004 Nissan Altima 2.5S-NEW
2006 Mazda 3i 2.0L-PreOwned

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: 732
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