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Old 03-21-2023, 12:01 AM   #2
LockDoc
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Join Date: Aug 2006
Location: Montezuma, Iowa
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Re: Radiator confusion = Is it Possible the l6 250 Rad is the same as the 350?

Quote:
Originally Posted by Yamariv View Post
Hey guys,

I'm currently doing a full service on my cooling system to get it ready before the hot weather hits.. I did a flush today and was planning on bringing in my original I6 250 rad into the rad shop to get it steam cleaned and pressure tested. My Dad had a good point suggesting I see what a bigger new rad would cost instead of dumping money into the old one. I was thinking of going bigger so that I've already got that angle covered if I decide to go with a SBC in the future.

I called my parts guy and he said his system shows the L6 250's rad the same as the 350 SBC for the 1971 year. I also checked Rock Auto and they suggest the exact same rads as replacements for the L6 and the 350 as well.

Is this possible??

Anything is possible but the stock radiators are not the same. I can't say specifically on the '71 but all of the I-6 trucks I have owned had 2 core radiators, all small blocks had the 3 core, and all big blocks had the four core. Maybe there were exceptions but not to my knowledge.

Maybe the newer technology makes it possible to use the thinner radiators as a replacement, or maybe they only make 3 & 4 core replacement radiators. Then it wouldn't be a problem. I would check on that.....

LockDoc
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