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05-06-2017, 03:59 PM
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#1 |
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Registered User
Join Date: Feb 2017
Location: Holt, Mo.
Posts: 8
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Radiator cap for v-6
Does the v-6 need a different radiator cap from the v-8's? Min wants to puke out quite a bit of antifreeze. It appears the neck on the radiator is long enough that my cap has no spring compression when tightened down. Just wondered if anyone has been through this?
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05-07-2017, 12:10 AM
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#2 |
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Senior Member
 Join Date: Aug 2005
Location: Los Angeles
Posts: 1,314
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Re: Radiator cap for v-6
No, my '67 351 V-6 uses the same radiator as a '68 396 with AC. Same 13 lbs. radiator ca p most any '67 uses. Do you have some kind of custom radiator?
__________________
1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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05-07-2017, 08:15 AM
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#3 |
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Registered User
Join Date: Feb 2017
Location: Holt, Mo.
Posts: 8
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Re: Radiator cap for v-6
This radiator is the original, just cap has been changed. If you top it off it will throw it out the overflow tube. Doesn't get hot although. I will do some measuring with with my micrometer and see how deep it is verses the distance it takes to compress the cap spring.
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05-07-2017, 09:30 AM
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#4 | |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
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Re: Radiator cap for v-6
Quote:
If not then don't keep filling the rad up. Let the level stabilize where it doesn't puke any coolant out. |
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05-07-2017, 07:33 PM
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#5 |
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Registered User
Join Date: Feb 2017
Location: Holt, Mo.
Posts: 8
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Re: Radiator cap for v-6
no overflow tank or recovery system on this truck. Just stripped down model.
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05-07-2017, 07:38 PM
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#6 |
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Registered User
Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: Radiator cap for v-6
Does the coolent end up about two inches down in the tank after it pukes and cools down? If it does that's where it wants to be.
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05-07-2017, 07:42 PM
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#7 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,579
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Re: Radiator cap for v-6
Why not add a recovery tank? Cheap & easy, and there's the benefit of an always-full radiator. You'll need a closed-system radiator cap, also inexpensive.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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05-07-2017, 10:33 PM
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#8 |
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Registered User
Join Date: Feb 2017
Location: Holt, Mo.
Posts: 8
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Re: Radiator cap for v-6
Thanks Mike, like I said, it never seems to get hot and yes about 2 inches down. I may do the recovery system. Been driving this old truck for almost 50 years. Grandpa bought it new, I was 13 or 14 when it first came home.
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05-07-2017, 11:41 PM
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#9 | |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,579
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Re: Radiator cap for v-6
Quote:
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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05-08-2017, 12:54 AM
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#10 |
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Senior Member
Join Date: Aug 2005
Location: Los Angeles
Posts: 1,314
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Re: Radiator cap for v-6
No overflow tank on mine, coolant level about 1.5" down from the top. Sounds like you don't have a problem!
__________________
1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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