Recent Topics
5/32 enough for Winter?
by SumpChump
10/31/14 11:52 PM
Noise from front wheel area
by weebl
10/31/14 11:31 PM
Need advice.
by joyridin83
10/31/14 11:06 PM
Amsoil SVG or Valvoline synpower 75w90
by donnyj08
10/31/14 10:54 PM
Kia oil control valve
by Propflux01
10/31/14 10:16 PM
Avalanche power steering cooler
by spasm3
10/31/14 09:58 PM
Sharp 42" LED 1080p/120Hz - $299
by mrsilv04
10/31/14 09:50 PM
brake squeak left turn.
by wrcsixeight
10/31/14 09:40 PM
Sgt. Tamoressi released
by FL_Rob
10/31/14 09:09 PM
Castrol Magnatec PDS.
by HappyLittlePony
10/31/14 08:29 PM
snowblower 5w20 wt oil
by subaroo
10/31/14 08:02 PM
Duralube
by bobbob
10/31/14 07:07 PM
Newest Members
joyridin83, NH73, Blkflg, steam_soldier, Ben_SC
51763 Registered Users
Who's Online
51 registered (340_Magnum, Bandito440, Analyzer, 901Memphis, abycat, 3 invisible), 743 Guests and 167 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51763 Members
64 Forums
221498 Topics
3502721 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: 9062
Loc: Middlesex County CT
hot fluid expands.
_________________________
2003 Echo >350K miles;Supergard 5W-[23]0;
2006 B2300;90K;ALM

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


Registered: 12/24/09
Posts: 3022
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: 12786
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: 11674
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, Hastings LF113
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: 7353
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!
_________________________
"Finally 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