Recent Topics
Help me pick a Summer tire to buy in the spring
by Luis_Gabriel
12/03/16 01:19 PM
Best cleaning oils have high calcium?
by CharlieBauer
12/03/16 12:53 PM
About to buy a SSD
by Oldmoparguy1
12/03/16 12:53 PM
anvils
by ET16
12/03/16 12:42 PM
Alternator Bearings...
by apwillard1986
12/03/16 12:38 PM
FS: New Bosch 18v Cordless Tools
by Bandito440
12/03/16 11:49 AM
Pennzoil High Mileage vs Castrol High Mileage
by aquariuscsm
12/03/16 11:27 AM
Finally decided on oil choice
by car51
12/03/16 11:15 AM
2015 Honda CRV, Mobil1 0w-20, 5 samples
by Danh
12/03/16 11:14 AM
How CFB teams picked to play for conference champs
by grampi
12/03/16 10:51 AM
Oil recommendation for Toyota 5.7 summer towing
by HawkeyeScott
12/03/16 09:44 AM
Looking for $10k car for wife to drive.
by JustinH
12/03/16 09:32 AM
Newest Members
Roswellien, Luis_Gabriel, Tech_man123, GLHRonin, Rochev
59770 Registered Users
Who's Online
80 registered (Al, alphadog, 05LGTLtd, AirgunSavant, AITG, 10 invisible), 1898 Guests and 19 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
59770 Members
66 Forums
257781 Topics
4240316 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 Offline


Registered: 09/14/10
Posts: 5634
Loc: S California
Compare it with one of your cars.

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


Registered: 06/05/03
Posts: 14486
Loc: apple valley, ca
Is the radiator full?
_________________________
02 Wrangler Chevron 10w30
87 F250 napa 15w40
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric edge 5w40

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


Registered: 09/02/05
Posts: 4123
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: 1499
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
1998 F250ld

Top