GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

can i swap my 27" radiator to a 34" on my 03 1500 4.8l?

Old May 29, 2012 | 01:24 PM
  #11  
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im in santa rosa,ca
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Old May 30, 2012 | 10:36 AM
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i wound up purchasing a 34" single with transoil cooler lines, i think i have those on my truck as itis. so it is now my understanding you can just remove the 27" and the 34 will bolt right in? also i was wondering besides the coolent that needs to be flushed anyways what else might i need to drain and replace?
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Old May 30, 2012 | 04:49 PM
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can anyone show me a link to instructions to installation of a bigger new radiator i have 99% confadence in my mechanical skill and just winging it but id rather have someone who has done it give me some pointers and such since they have been there done that.
thankyou
Blair
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Old May 30, 2012 | 04:54 PM
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Dont know of a link but it's pretty simple.
Drain the radiator using the provided drain plug or pop off the lower radiator hose. Disconnect the upper hose and remove the two clips holding the trans
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Old May 30, 2012 | 04:55 PM
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Check your other thread:

https://www.performancetrucks.net/fo...ilvera-502573/







Step by step..
Drain coolant
remove hoses
remove 28" radiator

drop in 34" radiator
install new hoses for 34" Rad
fill coolant

Ride..

Its easy
I think its either a 13 or 15mm socket and some pliers is all you need.
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Old May 30, 2012 | 05:12 PM
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Oops, wrong button on my phone!
Disconnect the trans cooler lines.
Remove the bolts holding the upper part of the shroud to the core support. There are two plastic clips on either side of the shroud holding the upper and lower portions together.
Remove the clutch fan using a large wrench. If it's been on there a while you will likely need to give the wrench a smack with a mallet to break the nut loose. Remove the fan and lower shroud. Remove the two bolts holding the radiator to the core support and lift it out. Remove the rubber air deflectors at either side of the old radiator space. Drop the new radiator in and attach using the outer core support holes. Reattach the trans cooler lines and then install the electric fans.
Add coolant of course
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Old May 30, 2012 | 06:30 PM
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You should go get a repair manual from the parts store
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Old Jun 1, 2012 | 02:27 PM
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Thank you to all ill take pictures today and do a pictorial step by step for future reference and hopefully I get it right
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Old Jun 1, 2012 | 06:54 PM
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Good luck man, it is pretty cut and dry, you will be fine and realize its just like replacing the old radiator. Should be no major obsticles.

Let us know how it turns out !!!

BTW your 27'' rad is actually a 28''
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Old Jun 1, 2012 | 10:02 PM
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ok my 28" i stand corrected thank you, easily was removed and the 34" slid in like it was meant to be there and my flex a light 282s fit like a dream and now i just need to finsih the wireing however i think before i complete everything im going to flush the whole coolent system just because when i drained the old rad i had alot of crap in it. anyone have any comments on flushing? just remove upper, thermostate and flush?
thank for all the help ill post the pics i did get being i left my iphone in the sun it wouldnt let me take more pictures after a point due to over heating.. haha
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