92 LT1 DeWitt radiator install ????
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,672
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From: Lake Wylie SC
92 LT1 DeWitt radiator install ????
Well it happened, my OEM radiator failed. I bought a new DeWitt "direct fit" radiator and it arrived last Thurs (3 days ago). I was watching a guy on youtube put one in his 92 (automatic, mine is a 6 speed) and his radiator came with spacers to increase the distance from the fans to the thicker radiator. Mine didn't come with those spacers. Before I start this project, does anyone know if I need those spacers? Hopefully, I don't, as there ain't much room in there because of the AC dryer (canister) that is mounted on the back of the radiator housing. Maybe Summit didn't package them in there. Anyone do this recently?
Thanks
Thanks
Racer
Joined: Mar 2002
Posts: 498
Likes: 21
From: Maine
Yes you need them. (1 spacer for the top, 1 for the bottom)
Well it happened, my OEM radiator failed. I bought a new DeWitt "direct fit" radiator and it arrived last Thurs (3 days ago). I was watching a guy on youtube put one in his 92 (automatic, mine is a 6 speed) and his radiator came with spacers to increase the distance from the fans to the thicker radiator. Mine didn't come with those spacers. Before I start this project, does anyone know if I need those spacers? Hopefully, I don't, as there ain't much room in there because of the AC dryer (canister) that is mounted on the back of the radiator housing. Maybe Summit didn't package them in there. Anyone do this recently?
Thanks
Thanks
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
First order of business is to call DeWitts and ask them if there should have been spacers, I would think.
DeWitts states the radiators are the same, except with or without transmission cooler.
DeWitts states the radiators are the same, except with or without transmission cooler.
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Well it happened, my OEM radiator failed. I bought a new DeWitt "direct fit" radiator and it arrived last Thurs (3 days ago). I was watching a guy on youtube put one in his 92 (automatic, mine is a 6 speed) and his radiator came with spacers to increase the distance from the fans to the thicker radiator. Mine didn't come with those spacers. Before I start this project, does anyone know if I need those spacers? Hopefully, I don't, as there ain't much room in there because of the AC dryer (canister) that is mounted on the back of the radiator housing. Maybe Summit didn't package them in there. Anyone do this recently?
Thanks
Thanks
Which rad did you get? The single row or double row?
Thread Starter
Race Director
Joined: Feb 2003
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From: Lake Wylie SC
We'll find out Monday.
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Double row. 1139090M Also the packaging didn't seem complete as there was only 3 styrofoam corners that secure the radiator in the box. No instructions and a baggie of used bolts and screws. I wonder if this was sent to another customer and they returned it missing the spacers? Hummmm. We'll find out Monday.
We'll find out Monday.
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
It should have been marked as an open box return unless someone pulled a fast one on Summit. They are open today and have customer service reps available.
I would call them and ask what the deal is also.
I would call them and ask what the deal is also.
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Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
I just put the single row in my 96. The single row uses the same side tanks as the double row. I was shipped the spacers. I called to ask if it was a mistake and they said I DID need them. I used them. It was not as simple of an install as I expected. On the bottom there are a piece of aluminum that fits next to the rubber mounts. There is a grand total of 1/16" clearance so it was hard to get lined up. When I finally got in in the only exact spot it could go and the drain was perfectly centered in the plastic cutout for it the top left radiator tube was tight to the plastic shroud. I could not get the radiator hose on without carving some shroud away. Would have been a way easier install if a little more clearance was given with the mounts and the tube welded in 1/4" more to the left.
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
I agree with the statement 'sounds like a return". It should have had the two plastic spacer bars and instruction sheet. Call John tomorrow and he can ship you out a set. Below is the tech sheet on that They are now using a foam machine and the package is ups proof.
Tech sheet
Tech sheet
Last edited by Tom@Dewitt; Apr 8, 2018 at 05:59 PM.
Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
I agree with the statement 'sounds like a return". It should have had the two plastic spacer bars and instruction sheet. Call John tomorrow and he can ship you out a set. Below is the tech sheet on that They are now using a foam machine and the package is ups proof.
Tech sheet
Tech sheet
Thread Starter
Race Director
Joined: Feb 2003
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From: Lake Wylie SC
Hi Tom, I went back and really looked though the packing material and found the plastic spacers. Don't I feel stupid. But, thank you for the instruction sheet. I'll call Summit and see if I can stop the request for the spacers. The spacers I got were plastic, not aluminum. Thank you so much for your help. BTW, the radiator is a piece of art. It's a shame the shroud covers it up.
Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
I put the single core unit in a few years ago and with the spal fans. Went over to Dewitts and showed them a problem with holes not drilled in proper place and John fixed that and the the a/c canister holes so it wouldn't hit fan. Also they made a bushing for the upper hose bracket to be used .
Great unit and service from John.
Great unit and service from John.
Thread Starter
Race Director
Joined: Feb 2003
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From: Lake Wylie SC
This is the hardest job I've been exposed to on my Vette. Getting the condenser and radiator to stay in the bottom rubber support grommets while putting on the upper shroud has me puzzled. Any suggestions? The trimming of the upper mounting rubber supports detailed in the instructions is right on. Getting at the 6 screws (3 on each side) is also kicking my butt, however, I first have to get the upper shroud on with the radiator and condenser in place. The Factory Service manual made it look so simple. 
Safety Car
Joined: Apr 2016
Posts: 4,648
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
This might be the first DeWitt install on a C4 with an electric water pump and a camber brace. I hope there is room.
Getting at the 6 screws (3 on each side) is also kicking my butt, however,
when I did mine, one of the forum members made a statement that triggered a "well duh" moment for me.
When putting it back together run the bolts in from the other side. that way you are putting the nuts on from an open area. once you look at it from that perspective, all you can say is "well duh" why didn't they do it that way from the beginning.
here you can see the spacer and the camber brace
Last edited by drcook; Apr 10, 2018 at 08:05 PM.
Thread Starter
Race Director
Joined: Feb 2003
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From: Lake Wylie SC
I got it in and there was room. Good thought on putting the 6 bolts in from the other side, but I managed (a 1/16th of a turn a time).
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.
Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
I got it in and there was room. Good thought on putting the 6 bolts in from the other side, but I managed (a 1/16th of a turn a time).
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.
Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
I got it in and there was room. Good thought on putting the 6 bolts in from the other side, but I managed (a 1/16th of a turn a time).
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.
One minor thing caused a little problem. The screws DeWitt gave to replace the shorter ones had a different thread that didn't work well with the slip nuts. I found some finer threaded screws that worked with the original slip nuts, but I broke one slip nut and it took out a little of the upper housing shroud where the slip nut slides on. Got it fixed, but Tom if you are watching, on my 92, my threads are much finer than the threads you have in the packaging. Otherwise, I think I'm just about finished. One last note, it took 2 people to set the upper shroud so the rubber mounts line up. Now to find some GM spring clamps for my new hoses.