| Author |
Message |
Steve 80 Crown Atomic (198.81.26.38)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, November 28, 2003 - 11:39 pm: | |
Anyone else got a vehicle with an 8-row radiator core?
My internet research has only pulled up trains and heavy construction vehicles using a radiator this size. The stripped core is 34 by 40.
After cleaning out the tightly packed crud between the fins, numerous leaks appeared, and the local hoodlums have since put a bullet through it, so time for a new/used radiator.
Is this size overkill for an 8V71N? Or maybe just another example of Crown’s philosophy of over-engineering and overbuilding their coaches? I’ll bet my coach was pretty close to it’s GVWR of 48,600 before the conversion began. The fan is 32" (made of 3/8 and 3/16 steel) with hydraulic clutch, pushing air through the radiator. The fan rotates via a 90 degree angle gearbox and 3ft driveshaft connected to the engine by belts.
It is possible the radiator was sized for a different engine /trans combination. Before it received it’s Allison HT740, my coach once had a manual transmission (the linkage brackets were not removed). My coach is a true factory rear-engine Crown, but there is no available data to confirm the original engine/trans. I have closely inspected the engine area framework and there are no unused bolt holes or unusual framing/welding to suggest a different engine was ever installed. The last company to use my bus in revenue service also maintained heavy construction equipment.
Any CrownNuts know what size radiator was used to cool a Hall-Scott?, a standard on older mid-engine Crowns.
Who’s got a 40,000 coach with an stock 8v71n and what size radiator (core dimensions and rows) has worked for you? What kind of terrain do you drive and what altitudes? I’ll be in hill country, mainly around the rockies, at altitudes from 4K-8K ft, and don’t plan on installing a water mist system.
Thanks for you input.
Steve |
Phil Dumpster (67.2.25.111)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 29, 2003 - 7:39 am: | |
Remember the atomics were designed to run in the desert, hence the big radiators.
The more you demand from a Detroit, the more heat it makes. |
Joel (64.142.48.67)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 29, 2003 - 11:27 am: | |
Steve,
Try contacting Pat Young, I believe that he may be parting out crowns and gilligs schoolies.
Pat Young
: Wheelchair Project
: Fresno, Ca
: 559 251-3814 |
Johnny (63.159.185.74)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 29, 2003 - 5:48 pm: | |
The more you demand from ANY engine, the hotter it runs. Horsepower is heat, and a turbo (though Steve doesn't have one) makes it worse.
I'd check with a radiator shop--they might actually be able to fix your radiator. |
JD-Crown.GA (66.32.130.160)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 29, 2003 - 9:57 pm: | |
Steve, I don't know how big your radiator is, but I have an extra one from a 40 ft 1972 Cummins powered Supercoach lying around. GA is probably a stretch from where you are, but you're welcome to it if you can use it.
Jim |
Henry R. Bergman, Jr. (Henryofcj) (63.224.197.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 01, 2003 - 5:31 pm: | |
Sorry, I do not remember what the radiator capacity was with the big Hall Scott (930 something) in our old '66 or sooss Crown Fire Engine.
The water capacity in my '74 10-wheeeler Big Cam Cummins is right at 102 quarts, including the mill and possibly the rear space heaters.
I would be willing to bet that Crown stuffed in the 8V71 as the factory engine and overkilled the cooling system as it was to be a hot weather, desert bus.
If the tranny was changed out to an Allision, then something would have to been done with the tranny cooling, either in the form of a larger radiator or...
...a large auxilllary tranny cooler. Does your Atomic have a tag axle or a SQHD type rear drivers? If it has a tag axle, then there may have been room...
...for a different configeration factory engine. Usually Crown just used the Detroit V6's and V8's in their rear engine Super Coaches. CROWNS FOREVER!!! |
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