Griffin Radiator, Griffin Radiator Cap? - Team Camaro Tech
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post #1 of 11 (permalink) Old Jan 3rd, 19, 04:49 PM Thread Starter
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Jim
 
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Griffin Radiator, Griffin Radiator Cap?

Hey guys, I've been looking through post archives but nothing has answered this question so far...
I have a nice Griffin exact fit aluminum radiator and it runs very cool, cooler than I'd like but that's not the issue. Even though it runs cool the water level runs about 4-5 inches below the radiator cap. Even with that, it still spills water/coolant on my floor. I was wondering if a Griffin radiator requires a Griffin cap? I am running a 16lb Duralast cap now. Should I go to a higher pressure cap?
On my last drive after filling the radiator a little bit, it apparently relieved water/coolant while the engine was running but not running hot... usually it runs about 165 or so.
Frustrating to say the least.
Thanks, Jim

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post #2 of 11 (permalink) Old Jan 3rd, 19, 08:52 PM
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Re: Griffin Radiator, Griffin Radiator Cap?

Jim an aluminum radiator can handle 22 to 24 psi pounds of pressure which raises the boiling point of the coolant. However if you still have your brass and copper heater core that kind of pressure will pop it like a toy balloon.

Other quest is am I wrong in that you do NOT have a coolant over flow reservoir? If you do you need a different radiator cap (one that holds pressure but allows fluid to be drawn from the over flow container as the engine cools). Also you fill the radiator to the top with an over flow catch can, not leave it down an inch or two (How far down depends upon you filling the radiator with a measuring can to know it's rated capacity). Because it is an exact fit it should contain the factory specified quantity of coolant (listed in the capacities pages of the Chassis Service manual).

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post #3 of 11 (permalink) Old Jan 4th, 19, 03:35 PM
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by 4Speed67CamaroRS View Post
Hey guys, I've been looking through post archives but nothing has answered this question so far...
I have a nice Griffin exact fit aluminum radiator and it runs very cool, cooler than I'd like but that's not the issue. Even though it runs cool the water level runs about 4-5 inches below the radiator cap. Even with that, it still spills water/coolant on my floor. I was wondering if a Griffin radiator requires a Griffin cap? I am running a 16lb Duralast cap now. Should I go to a higher pressure cap?
On my last drive after filling the radiator a little bit, it apparently relieved water/coolant while the engine was running but not running hot... usually it runs about 165 or so.
Frustrating to say the least.
Thanks, Jim
Jim, as the coolant heats up and expands it will push coolant out of the overflow.
Once the maximum expansion level is reached and pushed all the excess coolant out of the system, let it cool down. Once cooled remove the cap and that will be your fill level. Any coolant added above that level will be pushed out.
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Thanks,

Jeff


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post #4 of 11 (permalink) Old Jan 4th, 19, 05:57 PM Thread Starter
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by Larger Dave View Post
Jim an aluminum radiator can handle 22 to 24 psi pounds of pressure which raises the boiling point of the coolant. However if you still have your brass and copper heater core that kind of pressure will pop it like a toy balloon.

Other quest is am I wrong in that you do NOT have a coolant over flow reservoir? If you do you need a different radiator cap (one that holds pressure but allows fluid to be drawn from the over flow container as the engine cools). Also you fill the radiator to the top with an over flow catch can, not leave it down an inch or two (How far down depends upon you filling the radiator with a measuring can to know it's rated capacity). Because it is an exact fit it should contain the factory specified quantity of coolant (listed in the capacities pages of the Chassis Service manual).

Big Dave
Thanks Dave,
I'm not running a heater core... it's been bypassed and no hoses are running to it.
I do have an overflow but it's a cheap aftermarket aluminum container with a screw on cap that I had to drill a hole in the top of because after cool down, my top radiator hose would collapse. Also, I couldn't find a good place to mount it so in order to not have fluid on my garage floor, I hung it on the hood latch mount/horn bracket (RS Car) which is below the discharge. I think some of what sprayed my engine compartment while driving yesterday was from the hose clamp being a bit loose on the Radiator discharge tube.
I think I'll go with the '75 Nova (correct me if I'm wrong) overflow container that tucks in the passenger side fender.
Jim

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post #5 of 11 (permalink) Old Jan 4th, 19, 05:59 PM Thread Starter
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by Chevy68 View Post
Jim, as the coolant heats up and expands it will push coolant out of the overflow.
Once the maximum expansion level is reached and pushed all the excess coolant out of the system, let it cool down. Once cooled remove the cap and that will be your fill level. Any coolant added above that level will be pushed out.
Thanks Jeff,
I was getting a bit worried because my coolant level seemed very low. My gauge never ran hot at all but it just doesn't seem right.
Thanks, Jim

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post #6 of 11 (permalink) Old Jan 4th, 19, 07:51 PM
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by 4Speed67CamaroRS View Post
Thanks Jeff,
I was getting a bit worried because my coolant level seemed very low. My gauge never ran hot at all but it just doesn't seem right.
Thanks, Jim
Jim, with a recovery tank the radiator should be topped off as Dave mentioned, as the coolant expands the coolant will go into the recovery tank and will draw back to the radiator as it cools down. Most recovery tanks have level marks for cold and hot. Yes, 75 - 79 Nova tank works well and that is the setup I use.

Thanks,

Jeff


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post #7 of 11 (permalink) Old Jan 6th, 19, 01:11 PM Thread Starter
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Quote:
Originally Posted by Chevy68 View Post
Quote:
Originally Posted by 4Speed67CamaroRS View Post
Thanks Jeff,
I was getting a bit worried because my coolant level seemed very low. My gauge never ran hot at all but it just doesn't seem right.
Thanks, Jim
Jim, with a recovery tank the radiator should be topped off as Dave mentioned, as the coolant expands the coolant will go into the recovery tank and will draw back to the radiator as it cools down. Most recovery tanks have level marks for cold and hot. Yes, 75 - 79 Nova tank works well and that is the setup I use.
Thanks, ultimately I found a different size universal tank that tucked away nicely I the wheel well.
I believe what was the cause of the coolant sprayed all over the engine compartment was possibly a bad radiator cap not sealing properly and when it got hot and wanted to relieve pressure, it escaped from around the top of the cap.
I’ve now changed the cap and have the overflow tank installed. I will gradually increase the fluid level in the radiator and see what happens.
Does it require a different type of cap that allows it to draw fluid back into the radiator?
Thanks, Jim
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post #8 of 11 (permalink) Old Jan 6th, 19, 04:13 PM
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Jeff
 
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by 4Speed67CamaroRS View Post
Thanks, ultimately I found a different size universal tank that tucked away nicely I the wheel well.
I believe what was the cause of the coolant sprayed all over the engine compartment was possibly a bad radiator cap not sealing properly and when it got hot and wanted to relieve pressure, it escaped from around the top of the cap.
Iíve now changed the cap and have the overflow tank installed. I will gradually increase the fluid level in the radiator and see what happens.
Does it require a different type of cap that allows it to draw fluid back into the radiator?
Thanks, Jim
Glad you found something that works for you. Yes, the radiator cap needs to be designed to work with a recovery system.

Thanks,

Jeff


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post #9 of 11 (permalink) Old Jan 6th, 19, 07:24 PM Thread Starter
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by Chevy68 View Post
Glad you found something that works for you. Yes, the radiator cap needs to be designed to work with a recovery system.
Any suggestion for a particular radiator cap?
Thanks, Jim

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post #10 of 11 (permalink) Old Jan 7th, 19, 04:09 PM
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Jeff
 
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Re: Griffin Radiator, Griffin Radiator Cap?

Quote:
Originally Posted by 4Speed67CamaroRS View Post
Any suggestion for a particular radiator cap?
Thanks, Jim
Jim, really donít a recommendation for a cap. I always just went to the parts house and took what they had in stock, always worked out ok for me.
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Thanks,

Jeff


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post #11 of 11 (permalink) Old Jan 7th, 19, 04:19 PM
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Griffin just puts a fancy snap on cover over a standard cap.
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