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Old 06-16-2017, 03:52 AM   #1
LutzCoyote
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Default &2 Scout II 304 Radiator Cap PSI

Good Day,

I've been thru all the various threads on this issue and still not clear on the proper PSI Cap. Should it be 7 or 13?

As always as a newbie to the Scout world I appreciate all the excellent information I've received from previous posts, as well as, the what I've learned from the many others already on this site.

Thanks,
Sam
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Old 06-16-2017, 06:04 AM   #2
ihpartsjeff
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Default Re: &2 Scout II 304 Radiator Cap PSI

Depending on the year of your Scout will dictate which cap to use. For Scout 80/800's with no overflow tank, we use and sell a 7lb Radiator Cap And for Scout II and 69-75 Pickup/Travelall we use a 16# Radiator Cap.
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Old 06-16-2017, 06:39 AM   #3
LutzCoyote
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Default Re: &2 Scout II 304 Radiator Cap PSI

Thanks Jeff,

I have a 72 Scout II with a overflow tank so I'll order the #16 from you.

Thanks
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Old 08-20-2018, 06:54 PM   #4
mbiver
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Default Re: &2 Scout II 304 Radiator Cap PSI

Does anyone know what pound cap for a 77/78 Scout 2 with an overflow tank? Iíve seen both the 7 lb cap and 13 lb cap talked about. Thanks!
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube, rebuilt Holley 2245 Carb.
Unknown non-oem modifications
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Old 08-21-2018, 09:03 AM   #5
Zaedster
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Default Re: &2 Scout II 304 Radiator Cap PSI

Quote:
Originally Posted by mbiver View Post
Does anyone know what pound cap for a 77/78 Scout 2 with an overflow tank? Iíve seen both the 7 lb cap and 13 lb cap talked about. Thanks!
You will need a 16 lb. radiator cap.

https://www.ihpartsamerica.com/store...AD-CAP-16.html
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Old 08-21-2018, 04:18 PM   #6
mbiver
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Default Re: &2 Scout II 304 Radiator Cap PSI

Thanks!
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube, rebuilt Holley 2245 Carb.
Unknown non-oem modifications
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Old 10-05-2018, 06:48 AM   #7
mbiver
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Default Re: &2 Scout II 304 Radiator Cap PSI

I just replaced all my radiator/heater hoses/thermostat/cap, etc. Is it normal that I do not get any radiator fluid back in the reservoir tank, even after the engine is up to temp and driven on the highway? I don't see any leaks, and it has done this for years...very little to no radiator fluid ever goes to the reservoir tank. Thanks!
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube, rebuilt Holley 2245 Carb.
Unknown non-oem modifications
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Old 10-05-2018, 06:30 PM   #8
Scoutboy74
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Default Re: &2 Scout II 304 Radiator Cap PSI

As you fill the radiator, the overflow bottle should also have an amount of coolant added to it, as there is a LOW/FULL mark on the bottle. It can take a while to purge all the air out of the cooling system. As air is purged out, coolant from the overflow will be drawn in to replace it. Eventually, the level in the overflow will stabilize, letting you know that all the air has been purged from the system.
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