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Re: Raditor fill question,
[Re: 68HemiB]
#208126
01/30/09 09:25 PM
01/30/09 09:25 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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they didn't have coolant recovery systems(cap/bottle w hose to bottom) in 1969 so the shop manual is right for a period correct non reovery system where you want the level below the filler neck to allow for expansion.
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]
#208127
01/30/09 11:09 PM
01/30/09 11:09 PM
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Joined: Jan 2003
Posts: 13,577
md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,577
md
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Quote:
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.
This is correct if you have the correct coolant recovery type cap.
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Re: Raditor fill question,
[Re: mopars4ever]
#208128
01/30/09 11:46 PM
01/30/09 11:46 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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I remember when the coolant recovery system came out in the 70's, they found as much as a 10 degree drop in temp(with no other changes) by eliminating the air bubbles(which do not transfer heat) & speculated that there would be less rust over the long run, same reason,less air.
live every 24 hour block of time like it's your last day on earth
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Re: Raditor fill question,
[Re: 474218]
#208130
01/31/09 01:53 PM
01/31/09 01:53 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
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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.
I have yet to see a 70 b-body recovery tank.Can you show me one and its location? 
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Re: Raditor fill question,
[Re: DennisH ]
#208131
01/31/09 01:56 PM
01/31/09 01:56 PM
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Joined: Jan 2003
Posts: 13,577
md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,577
md
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Quote:
Good God. This is "more than you could ever stand to know" about radiator caps. I got a stock-looking cap from Nick that doesn't say Made in Mexico on it. Then, a dime-store recovery tank at the Auto Zone where everything is made in China. Then fill to TWO INCHES from the top with new green coolant. 180 stat. Never had a problem. Does not piss/purge
Take off the cap when cold and I bet ya the radiator is full now. Note: fill radiator to top if using china or mopar recovery system (with the proper cap)and do not fill it to the top if you not using a recovery tank. Its that simple.
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Re: Raditor fill question,
[Re: MidPenMopar]
#208132
01/31/09 03:03 PM
01/31/09 03:03 PM
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Joined: Jun 2005
Posts: 1,534
Florida
CHRGR69
pro stock
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pro stock
Joined: Jun 2005
Posts: 1,534
Florida
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This one actually has a guage built into the top of the cap that tells you the temperture too.
Sorry, but those caps are crap. I had a new one literally come apart while driving 60 miles to a Mopar show. I just bought a real cap at the show.
Grandma always said I had "hands of gold"!
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Re: Raditor fill question,
[Re: CHRGR69]
#208133
02/01/09 01:04 PM
02/01/09 01:04 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
Looking for fun? Keep looking
Joined: Dec 2003
Posts: 36,840
South San Francisco, Californi...
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Quote:
Sorry, but those caps are crap. I had a new one literally come apart while driving 60 miles to a Mopar show. I just bought a real cap at the show.
I will be sure to keep my old one with me just in case of said incident. I got this one as a gift from a buddy who has one too. I commented on the fact it was neat to have a guage in the cap so he got one for me. We shall see how it holds up.
BTW the guy who gave me the new cap has a pretty cute wife, maybe i will tell him how good looking she is. You just never know??? 
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