Radiator swap 350 to 400 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dvanek · 09-13-2011, 01:55 AM

I have a project truck, 1989 Chevy Suburban V2500, 4x4 with the 350 TBI that has 81,000 original miles. I want to replace the factory radiator with one out of a 1980 GMC with a 400, 6.6. Automatic Trans. As far as sizes look it all matches. Does anyone know of any incompatabilities between the two?

75ChevyGuy · 09-17-2011, 08:18 AM

Is the 400 a gas or diesel motor?

dvanek · 09-17-2011, 10:43 AM

The 400 is Gas

75ChevyGuy · 09-17-2011, 12:07 PM

It appears that the 400 is only slighty bigger than the 350's radiator. But may I ask why you want to change out the radiators?

dvanek · 09-17-2011, 12:46 PM

I am hoping it will give the engine better cooling
Circulation, in pulling or hot weather.

Would this help or will it be a mistake?
Posted via Mobile Device

texasfunk · 09-17-2011, 01:10 PM

Wouldn't be a mistake...but don't hunk it will make a big difference either...

masterjohnson · 10-14-2011, 11:34 PM

Quote:

Originally Posted by dvanek

I have a project truck, 1989 Chevy Suburban V2500, 4x4 with the 350 TBI that has 81,000 original miles. I want to replace the factory radiator with one out of a 1980 GMC with a 400, 6.6. Automatic Trans. As far as sizes look it all matches. Does anyone know of any incompatabilities between the two?

i dont think you can install it without doing any modifications on your chevy. good luck with that project and post some pictures on this thread. really interesting to see.lol GL!

09-13-2011, 01:55 AM	#1
dvanek Registered User Join Date: Sep 2011 Location: Sacramento, California Posts: 11	Radiator swap 350 to 400 I have a project truck, 1989 Chevy Suburban V2500, 4x4 with the 350 TBI that has 81,000 original miles. I want to replace the factory radiator with one out of a 1980 GMC with a 400, 6.6. Automatic Trans. As far as sizes look it all matches. Does anyone know of any incompatabilities between the two?

09-17-2011, 08:18 AM	#2
75ChevyGuy GM Parts Guy Join Date: Jan 2011 Location: Attleboro MA Posts: 375	Re: Radiator swap 350 to 400 Is the 400 a gas or diesel motor? __________________ 1975 Chevrolet C-10 Custom Deluxe (DD/WIP) 1989 Chevrolet C1500 reg cab stepside (Winter Truck) 1977 Harley Davidson XLH 1000 (Summer Cruiser)

09-17-2011, 10:43 AM	#3
dvanek Registered User Join Date: Sep 2011 Location: Sacramento, California Posts: 11	Re: Radiator swap 350 to 400 The 400 is Gas

09-17-2011, 12:07 PM	#4
75ChevyGuy GM Parts Guy Join Date: Jan 2011 Location: Attleboro MA Posts: 375	Re: Radiator swap 350 to 400 It appears that the 400 is only slighty bigger than the 350's radiator. But may I ask why you want to change out the radiators? __________________ 1975 Chevrolet C-10 Custom Deluxe (DD/WIP) 1989 Chevrolet C1500 reg cab stepside (Winter Truck) 1977 Harley Davidson XLH 1000 (Summer Cruiser)

09-17-2011, 12:46 PM	#5
dvanek Registered User Join Date: Sep 2011 Location: Sacramento, California Posts: 11	Re: Radiator swap 350 to 400 I am hoping it will give the engine better cooling Circulation, in pulling or hot weather. Would this help or will it be a mistake? Posted via Mobile Device

09-17-2011, 01:10 PM	#6
texasfunk Registered User Join Date: Jun 2009 Location: Lubbock, TX Posts: 1,671	Re: Radiator swap 350 to 400 Wouldn't be a mistake...but don't hunk it will make a big difference either...



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