Recent Topics
Portable air compressor?
by FirstNissan
07/30/15 08:00 PM
Anyone rennet when M1 15w50 came out?
by car51
07/30/15 07:47 PM
Mazda3 noise after rear brake/rotor install
by Blumurder
07/30/15 07:45 PM
Tesla motor
by OneEyeJack
07/30/15 07:43 PM
[Cut Open] Fram Filtration XG7317 Ultra 19,275 mi
by DuckRyder
07/30/15 07:35 PM
Help installing oil cooler (sandwich adapter)
by Jordanw6
07/30/15 07:30 PM
Ram drain plug gasket
by Rojack
07/30/15 07:12 PM
More Red Line Specs
by priler
07/30/15 07:09 PM
Denso oil filters, new part numbers?
by rustypigeon
07/30/15 06:58 PM
buying a used bike
by ROLEXrifleman
07/30/15 06:36 PM
Pennzoil fans? Here's the selection at my Autozone
by jdavis
07/30/15 06:20 PM
Driveway pricing
by seanf
07/30/15 06:15 PM
Newest Members
csammons, TOYJOETA, be3, Earl_Von_Syntec, Raj76
54892 Registered Users
Who's Online
106 registered (AandPDan, aquariuscsm, 901Memphis, afree, 2002 Maxima SE, arkainzeye, 7 invisible), 1661 Guests and 94 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
54892 Members
66 Forums
235138 Topics
3782777 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3392205 - 06/08/14 01:51 PM Radiator pressure
justinf89 Offline


Registered: 07/11/10
Posts: 534
Loc: Hampton, VA
I've been doing maintenance on a buddys '07 explorer with the v6. I went to check the radiator and it had a lot of pressure after loosening the cap. This was after it sat overnight. I changed to coolant so I've been trying to purge the air, but it won't draw from the expansion tank.

Sound like a new cap is in order? Why wouldn't the pressure equalize overnight?
_________________________
97 Explorer 4.0L SOHC - 155k - ML 5w-30/PL30001

04 Safari 4.3L - 235k - ML 5w-30/L24011

05 Silverado 6.6L DMX - 135k - Ams AME/EAO52

Top
#3392212 - 06/08/14 01:56 PM Re: Radiator pressure [Re: justinf89]
OneEyeJack Online   content


Registered: 09/14/10
Posts: 3485
Loc: S California
Compare it with one of your cars.
_________________________
84 Honda Civic wagon 5-speed, 440K+ Red Line 0w-30, Red Line MTL
03 Toyota 4Runner V8 2WD, 145K+ Red Line 0w-30, Red Line D4 & 75W85 GL-5

Top
#3392236 - 06/08/14 02:14 PM Re: Radiator pressure [Re: justinf89]
Chris142 Offline


Registered: 06/05/03
Posts: 12740
Loc: apple valley, ca
Is the radiator full?
_________________________
02 Wrangler durablend 10w40
87 F250 Diesel Mystic 15w50
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

Top
#3392247 - 06/08/14 02:32 PM Re: Radiator pressure [Re: justinf89]
Warstud Offline


Registered: 09/02/05
Posts: 3405
Loc: MIchigan
Make sure the air is purged from the cooling system before you suspect somethings wrong with the Rad Cap. Try jacking up the front end and running it with the cap off.

FYI: On a cold motor the Rad should be full and the expansion tank should be at the Cold mark. When the motor gets up to temperature the expansion tank should read Hot. When you shut the motor off the Rad should draw coolant from the expansion tank
until it fills up and the expansion tank should read Cold again.

Top
#3393461 - 06/09/14 09:02 PM Re: Radiator pressure [Re: Warstud]
asand1 Offline


Registered: 12/16/12
Posts: 1198
Loc: Oregon coast
Originally Posted By: Warstud
: On a cold motor the Rad should be full and the expansion tank should be at the Cold mark. When the motor gets up to temperature the expansion tank should read Hot. When you shut the motor off the Rad should draw coolant from the expansion tank
until it fills up and the expansion tank should read Cold again.


This will only happen when the cap is not plugged
_________________________
Nissan/Infinity/Mazda Manuals
1996 Maxima 310K
2008 Uplander 80K

Top