| [GMCnet] radiator!!! [message #140066] |
Fri, 19 August 2011 17:04  |
john arbuckle
Messages: 122
Registered: March 2010
Karma: 0
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Hey everyone well here I am with another brain buster. I need to pull
the radiator from the rig d/t a significant leak. Does anyone have any
great words of wisdom or tips to make this process easier than it
seems? Any help would be appreciated. And also I need to have the
transmission rebuilt and I have an individual to do it for me as a
side job. Now be honest. Is it a terror like I have heard or can it be
done without any significant distress. Any tips or wisdom would be
great.
Thank you
John Arbuckle
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| Re: [GMCnet] radiator!!! [message #140069 is a reply to message #140066] |
Fri, 19 August 2011 17:17  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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It seems that many people have cut the radiator support along the sides to make the radiator easier to remove (then welded some angled metal to make the piece easy to reattach). You should be able to find pics on the picture site.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] radiator!!! [message #140079 is a reply to message #140066] |
Fri, 19 August 2011 18:36 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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John,
IMHO, the easiest way is to cut the frame near the bottom and splice it
together with a pair of 3" butts (door hinges). Mark the holes and scribe a
line where they separate. Cut there, using a hack saw, reciprocating saw,
cutting wheel, etc. A piece of thick sheet metal between radiator and the
cutting tool is a good precaution. Be sure to support the bottom of the
frame while cutting -- you don't want the radiator to fall out.
After the radiator's out, drill the marked holes and bolt the butt halves in
place; or, preferably, weld them. When reassembling, replace the butt pins
with bolts.
What are the qualifications of your part time mechanic? How many TH-425's
has he rebuilt? How recently? It's not a job for a jack-leg, shade tree
mechanic. There aren't a lot of people left with the appropriate
experience. There can be complications and subtle problems for even a
highly experienced TH-425 mechanic to contend with -- one of the best was
here in April demonstrating the complexities during a 4-transmission
session. I have on my side table the TH-425 section out of the X-7525
manual for study before pulling my own transmission next Wednesday. I'm
expecting a simple repair requiring no teardown, but I'm still concerned.
An order to Manny Travao may be a wiser move for both of us.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Fri, Aug 19, 2011 at 6:04 PM, john arbuckle <jarbuckle1209@gmail.com>wrote:
> Hey everyone well here I am with another brain buster. I need to pull
> the radiator from the rig d/t a significant leak. Does anyone have any
> great words of wisdom or tips to make this process easier than it
> seems? Any help would be appreciated. And also I need to have the
> transmission rebuilt and I have an individual to do it for me as a
> side job. Now be honest. Is it a terror like I have heard or can it be
> done without any significant distress. Any tips or wisdom would be
> great.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] radiator!!! [message #140096 is a reply to message #140066] |
Fri, 19 August 2011 19:49 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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John, You can do it whatever way you want. I did it the Jim Bounds way:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=34552&title=timing-chain-2fradiator&cat=5504
http://www.gmcmhphotos.com/photos/showphoto.php?photo=34564&title=timing-chain-2fradiator&cat=5504
http://www.gmcmhphotos.com/photos/showphoto.php?photo=34567&title=timing-chain-2fradiator&cat=5504
It makes it easy, and if you have to do it again, even easier the next time. You can also bolt straight pieces of plate or angle iron to the support instead of welding. or do as Ken suggested with butt hinges. If you don't want to cut the support frame, there are other options (Gene's) or remove the whole frame (the hard way, in my opinion).
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] radiator!!! [message #140111 is a reply to message #140066] |
Fri, 19 August 2011 20:24 |
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Ok I've looked at both Gene's way, seems simple enough, and I've heard for years that the "way to do this" is to cut the radiator frame. Either way seems pretty straightforward so what's the advantage of cutting the frame?
Also, if/when I ever have to replace my radiator I will replace it with one of Gene Dotson's aluminum units. Is one procedure better than the other when retrofitting an aluminum unit?
Bill Brown - '77 Buckeye Cruiser
Coshocton OH
carguybill@sbcglobal.net
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| Re: [GMCnet] radiator!!! [message #140116 is a reply to message #140111] |
Fri, 19 August 2011 20:46 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Cutting the frame makes it possible to lower & raise the radiator straight
down & up without removing the hard-to-reach top bolts.
When you install the aluminum radiator, you'll have cut out at least one of
the retainers for the rubber isolators at the bottom and top of the frame
Having the bottom on the workbench makes removing the bottom one easier.
Having the bottom out of the way makes access to the top easier.
Ken H.
On Fri, Aug 19, 2011 at 9:24 PM, Bill Brown <carguybill@sbcglobal.net>wrote:
>
>
> Ok I've looked at both Gene's way, seems simple enough, and I've heard for
> years that the "way to do this" is to cut the radiator frame. Either way
> seems pretty straightforward so what's the advantage of cutting the frame?
>
> Also, if/when I ever have to replace my radiator I will replace it with one
> of Gene Dotson's aluminum units. Is one procedure better than the other
> when retrofitting an aluminum unit?
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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