Recent Topics
Pennzoil Synthetic Blend (At least 50% syn) quest.
by wemay
07/22/14 02:03 PM
B2300 tuneup; things that make you say hmmmmm.
by simple_gifts
07/22/14 01:51 PM
online tool for drilling templates?
by dwcopple
07/22/14 01:42 PM
Motorcraft CAF from Walmart
by Whimsey
07/22/14 11:54 AM
F1 - 2014 Hungarian Grand Prix
by gofast182
07/22/14 11:44 AM
My wife's "new" BMW!
by Patman
07/22/14 11:39 AM
VOA for Pennzoil Ultra Platinum?
by Pajero
07/22/14 11:35 AM
New fully synthetic filter media - Mahle
by route66mike
07/22/14 11:35 AM
RJ Reynolds ordered to pay Robinson $25 billion
by OVERKILL
07/22/14 10:08 AM
My Oil Choices delivering pizzas
by AvoidTheNoid
07/22/14 09:41 AM
gas & diesel now only 10 cents apart
by Donald
07/22/14 09:37 AM
Complete Redline Synthetic Harley Oil/Fluid Change
by Climb14er
07/22/14 09:11 AM
Newest Members
Iroll, CMTG, Kneedragger37, Constantly, jimmy69stebbins
50712 Registered Users
Who's Online
103 registered (05LGTLtd, andrewg, 1345, 901Memphis, 94 saturn sl1 2000 saturn sc2, 8 invisible), 2175 Guests and 218 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
50712 Members
64 Forums
216633 Topics
3409165 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: 728
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: 8665
Loc: Middlesex County CT
hot fluid expands.
_________________________
2003 Echo >340K miles;Supergard 5W-[23]0;
2006 B2300;88K;ALM

I prefer cats over dogs; Cats have the sense not to roll in their own poop

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


Registered: 12/24/09
Posts: 2970
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: PU 5w30, P1 24011

'98 Regal GS: body scrapped.

'99 Grand Prix L36: Pennzoil Dexos blend 5w30/PF52E

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: 12781
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: 10959
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: 6843
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
2001 Lexus RX-300 V6
2004 Nissan Altima 2.5S
2006 Mazda 3i 2.0L

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: 728
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