New Radiator - overheating |
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dluber
Member Joined: 24 May 2016 Location: Maryland Status: Offline Points: 817 |
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Posted: 18 June 2021 at 11:30am |
Hello all, Long story short, my old radiator was damaged the last time I went to Raush Creek, PA so I swapped in a new Champion 3 core aluminum radiator as a replacement. Prior to the new radiator, I was running max 180 degrees consistently. With the new Champion, it's pushing to 220 very quickly and I think it would go higher if I didn't shut the engine down. All new coolant and the coolant seems to be exchanging fine. A few observations, this new radiator does not have a shroud and if I had to guess, it does not appear to hold as much coolant. This is the first aluminum radiator I've used so I'm open to any suggestions. Champion Radiator CC5241. Thanks, Dave L.
Edited by dluber - 18 June 2021 at 11:56am |
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2384 |
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Did you drill hole in the thermostat flange? There could be air trapped in the head. That would give you a 220 reading - if the coolant is not moving due to some sort of a air pocket.
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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dluber
Member Joined: 24 May 2016 Location: Maryland Status: Offline Points: 817 |
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Stev, yes, I have the 1/8" hole from the last time I replaced the thermostat. Thanks for the question. I'm hoping it's an air pocket issue. I'm going to give it a test again in a few minutes.
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oldmansimek
Member Joined: 23 Apr. 2019 Location: CT Status: Offline Points: 177 |
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You need a shroud. It would appear you are 12 volts so the easiest way to accomplish that is buy a shroud with built in electric fans.
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dluber
Member Joined: 24 May 2016 Location: Maryland Status: Offline Points: 817 |
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I am running 12v now, I will look into a shroud.
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rocnroll
Member Sponsor Member Joined: 20 July 2005 Location: Tuscumbia, AL Status: Offline Points: 13584 |
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Did you 'burp' it?
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'47 CJ2A PU
'48 CJ2A Lefty "Common sense is not that common" |
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Jeepinjase
Member Joined: 09 Sep. 2018 Location: Gardnerville, N Status: Offline Points: 56 |
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I have the same radiator in my 2a. I was having the same problem. I went with an electric fan set up and it helped a little but didn’t take care of the whole problem.
A fan shroud made all the difference!
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Rick G
Member Joined: 17 May 2015 Location: Amarillo, TX Status: Offline Points: 1467 |
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How many fins per inch is your new radiator? Even though you have an extra row of tubes, you need the appropriate fins per inch (10-12) or you will run “hot”. I had a brand new 3 row copper/brass radiator and it always ran hot due to a low fin count. The fins (and to a degree, the type/size of the tubes) are how you dissipate the heat from the system. This is very crucial regardless of radiator construction material. Having a shroud is important also. Close off the gaps between the radiator and the grill also. You want all the air going thru the radiator and not out around it.
Edited by Rick G - 19 June 2021 at 10:00am |
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muley
Member Joined: 25 Jan. 2021 Location: idaho Status: Offline Points: 821 |
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Dave, that fan is pulling nothing thru the rad.. nothing. I put an alum rad in my 3A salad, its the exact size w/h as an orig. I pulled a shroud from a dead rad and used good ol'JB weld to "weld" it to the alum rad. 3 yrs later JB is still on the job, 160 deg tstat and I never see 180 on the gage. I've got fotos if you wanna see the rad/shroud setup..
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Joined Jan-8 2015
I never met a mule I didn't like! OD Mule 01-52 M38 Big Red 19fiddy CJ3A salad |
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dluber
Member Joined: 24 May 2016 Location: Maryland Status: Offline Points: 817 |
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If you have some photos, that would be great.
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7980 |
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I have the same radiator in my jeep and when the jeep is moving it never gets above 185 with a 185 thermostat. I have my electric fans kick on at 190 and unless the jeep is stationary I never hear the fans come on.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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muley
Member Joined: 25 Jan. 2021 Location: idaho Status: Offline Points: 821 |
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not much to see. the biggest challenge was the curve in the bottom tube (the stock rad bottom tube was straight) interfered w/shroud. Cut off the curved tube and tig'd on a straight one. |
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Joined Jan-8 2015
I never met a mule I didn't like! OD Mule 01-52 M38 Big Red 19fiddy CJ3A salad |
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muley
Member Joined: 25 Jan. 2021 Location: idaho Status: Offline Points: 821 |
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the above pics are pre-JB while checking fitment-mockup. The duck tape and cardboard lends a nice touch don't you think?
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Joined Jan-8 2015
I never met a mule I didn't like! OD Mule 01-52 M38 Big Red 19fiddy CJ3A salad |
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dluber
Member Joined: 24 May 2016 Location: Maryland Status: Offline Points: 817 |
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Thanks for the photos! Looks like I will need to fabricate a shroud.
Edited by dluber - 20 June 2021 at 6:00am |
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