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Re: Raditor fill question,
[Re: MoparforLife]
#208109
01/29/09 08:02 PM
01/29/09 08:02 PM
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Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
MidPenMopar
OP
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OP
Looking for fun? Keep looking
Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
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Quote:
with no reserve/recovery system they are filled about to the level of the baffle plate that you can see looking into the neck. Must have room for expansion.
I just changed from a 7 PSI cap that has an overflow to 16 PSI cap. I still have the overflow hooked though, but i was thinking it should be a little low.
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Re: Raditor fill question,
[Re: MidPenMopar]
#208110
01/29/09 08:13 PM
01/29/09 08:13 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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with a recovery cap/bottle you would want it full to the ledge where the cap seals to purge as much air out of there as possible
live every 24 hour block of time like it's your last day on earth
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Re: Raditor fill question,
[Re: RapidRobert]
#208111
01/29/09 08:17 PM
01/29/09 08:17 PM
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Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
MidPenMopar
OP
Looking for fun? Keep looking
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OP
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Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
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Quote:
with a recovery cap/bottle you would want it full to the ledge where the cap seals to purge as much air out of there as possible
Are all caps designed to let overflow happen or it is just specific ones?
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Re: Raditor fill question,
[Re: MidPenMopar]
#208112
01/29/09 08:42 PM
01/29/09 08:42 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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recovery caps have the thin piece of metal on the bottom side of the rubber seal about the size of a quarter & it dangles loose.
live every 24 hour block of time like it's your last day on earth
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Re: Raditor fill question,
[Re: MidPenMopar]
#208118
01/29/09 09:39 PM
01/29/09 09:39 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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a recovery cap
Last edited by RapidRobert; 01/29/09 09:43 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Raditor fill question,
[Re: MidPenMopar]
#208122
01/30/09 06:27 PM
01/30/09 06:27 PM
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Joined: Feb 2007
Posts: 1,109
Hiram, Georgia
474218
super stock
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super stock
Joined: Feb 2007
Posts: 1,109
Hiram, Georgia
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Quote:
I always wondered if on the stock radiator of the roadrunner you want it filled to the top or leave it a little low ( like an inch below the cap). 
From the Service Manual page 7-5 under Installation: "(3) Fill cooling system to 1 1/4" below the filler neck seat with water and rust resistor or water and anti-freeze, as required. After warm-up, re-check coolent level.
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Re: Raditor fill question,
[Re: 474218]
#208123
01/30/09 07:06 PM
01/30/09 07:06 PM
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Joined: Nov 2004
Posts: 9,312
SoCal
68HemiB
master
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master
Joined: Nov 2004
Posts: 9,312
SoCal
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Quote:
Quote:
I always wondered if on the stock radiator of the roadrunner you want it filled to the top or leave it a little low ( like an inch below the cap).
From the Service Manual page 7-5 under Installation: "(3) Fill cooling system to 1 1/4" below the filler neck seat with water and rust resistor or water and anti-freeze, as required. After warm-up, re-check coolent level.
Which are fine instructions for a cooling system without an overflow/coolant recovery bottle (which was how Stu's vintage RR was originally delivered). The intent was to provide some headroom in the radiator for the expansion as things heated up, without puking some out onto the ground.
As stated before, with the addition of an overflow bottle, radiators should be filled to the top, with the "headroom" essentially being between the cold and hot lines on the overflow bottle.
To make it even simpler, if you start with a properly constructed overflow system and the radiator anywhere in the neighborhood of filled, a few cycles of going from a cold system to a hot system and then back to a cold system will take care of the level inside the radiator, provided you watch the level in the overflow bottle and adjust things there.
Down to just a blue car now.
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Re: Raditor fill question,
[Re: 68HemiB]
#208124
01/30/09 08:53 PM
01/30/09 08:53 PM
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Joined: Feb 2007
Posts: 1,109
Hiram, Georgia
474218
super stock
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super stock
Joined: Feb 2007
Posts: 1,109
Hiram, Georgia
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Quote:
Quote:
Quote:
I always wondered if on the stock radiator of the roadrunner you want it filled to the top or leave it a little low ( like an inch below the cap).
From the Service Manual page 7-5 under Installation: "(3) Fill cooling system to 1 1/4" below the filler neck seat with water and rust resistor or water and anti-freeze, as required. After warm-up, re-check coolent level.
Which are fine instructions for a cooling system without an overflow/coolant recovery bottle (which was how Stu's vintage RR was originally delivered). The intent was to provide some headroom in the radiator for the expansion as things heated up, without puking some out onto the ground.
As stated before, with the addition of an overflow bottle, radiators should be filled to the top, with the "headroom" essentially being between the cold and hot lines on the overflow bottle.
To make it even simpler, if you start with a properly constructed overflow system and the radiator anywhere in the neighborhood of filled, a few cycles of going from a cold system to a hot system and then back to a cold system will take care of the level inside the radiator, provided you watch the level in the overflow bottle and adjust things there.
So I take it you think the Factory Service Manual is wrong?
Well I went back and read the cooling section throughly it made no mention of filling the radiator of a car with a coolent overflow system any differently. Then I did a little more reading and the first mention of a overflow coolent recovery system offered for B Body cars was in 1970 and I thought Stu's "vintage" RR was a 69? However I have been mistaken in the past.
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Re: Raditor fill question,
[Re: 474218]
#208125
01/30/09 09:09 PM
01/30/09 09:09 PM
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Joined: Nov 2004
Posts: 9,312
SoCal
68HemiB
master
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master
Joined: Nov 2004
Posts: 9,312
SoCal
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Quote:
So I take it you think the Factory Service Manual is wrong?
Well I went back and read the cooling section throughly it made no mention of filling the radiator of a car with a coolent overflow system any differently. Then I did a little more reading and the first mention of a overflow coolent recovery system offered for B Body cars was in 1970 and I thought Stu's "vintage" RR was a 69? However I have been mistaken in the past.
I have no beef with you.
I believe that Stu's RR may not have had a recovery system on it originally, but seems to have one now.
I make no claims about the Factory Service Manual's accuracy. It is my opinion and pure speculation that the words you posted were written with a NON-coolant recovery system in mind, during a period of time when coolant recovery systems were not yet in wide use by Chrysler Corporation.
Knowing what we now know in 2009 about coolant recovery systems (by now, a mature system in wide use), there is no need to leave an air gap above the coolant in a radiator so equipped. If one leaves such an air gap, has coolant in the recovery bottle, and cycles the car through a few cold-hot-cold cycles, any such air gap will go away.
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