The Stovebolt Site Forums The Shop Area General Truck Talk Can you Americans show me your GMC AD radiators?

Okie dokie. What I'd like to see, is how the radiator looks on your USA GMC trucks. In Canada, our GMC's came with Chev engines. My understanding is that the GMC engines are longer, so the rad core would need to be further ahead. I have a 235 in my truck right now, an the fan is about 3/4" from the core.

At some point, I'm going to shop for a "new" engine for my bus, and I figure I should expand my search to include GMC engines, if it will fit without drama.

Here's the way my truck looks.

http://i221.photobucket.com/albums/dd45/HomeCrafter/PanelBurb/IMGP1556.jpg

http://i221.photobucket.com/albums/dd45/HomeCrafter/PanelBurb/IMGP1554.jpg

http://i221.photobucket.com/albums/dd45/HomeCrafter/PanelBurb/IMGP1552.jpg

What's your USA GMC look like?

You have the same radiator as the U.S. made GMC's (very close anyway). These radiators GMC type have a different tank top like yours with a surge/expansion feature incorporated in. The Chevrolet top tank has a different filler neck and bottom tank is straight out on the hose attachment and it does not have the surge features.

That is not the same as a US GMC radiator. They are similar with the pressure relief built into the left side and they do have side mounts but they mount further forward under that top cross bar and have a filler neck on the right aft side, not top side.

I'll take some pics later.

Perfect, this is something that I've always wondered about.

Hy Mr Lang, Canadian GMCs with Chevrolet engines in them also have Chevrolet front frame crossmembers in them, this is to allow the shorter Chevrolet engine to fit properly, just one more thing to think about when swapping to a GMC engine, hope that helps.

Ahh, so I would need to replace the cross member too. Well now, you learn something new every day.

This is just the sort of information I'm looking for.

I'm sure this is old hat to many of you, but I figured the only way to learn was to ask?

Question? Is it a different cross member or is it just located in a slightly different location. Larry

It is a different cross member (in the USA GMC trucks). It looks like they are using the same attachment locations.

Tim, as usual, that picture is just the ticket!

Anyone ever change the crossmember?

I believe I read over on oldgmctrucks that a fellow did just that, he used grade eight bolts to bolt on the GMC crossmember. I think this was to install a big 'ol 302. I think that would be a noticeable difference when compared to a 216!

I can confirm the rivet holes are the same. I built a run stand from a frame and have interchangeable cross members.