ADDvanced
Member
I recently picked up a new (used) topper for my 94 Dak. It does not have a front window on the topper, instead it has what I discovered is called a compression seal that pushes up against the rear of the cab.
Type 540 is what I have
The biggest issue at the moment is the compression seal/compression boot between the topper and the cab; the lower radius does NOT match the shape of the window. When I installed the topper, I used ratchet straps through the front windows to pull the topper forward tightly, but it isn't enough.
Water will run down the outside edges, then wrap inwards and come in the bed where the seal joins together in the middle. It actually pools up a bit in the center of the seal, when you're inside the truck.
I sketched a quick diagram of the situation and attached it.
Options as I see it:
1: Remove topper, apply giant bead of silicone, reinstall and hope for the best
2: Remove topper, remove seal from topper, grind out lower corners to more closely match radius of rear window, spend $75 on new, slightly longer seal, reinstall
3: Attach trailer full of gasoline leaf blowers connected to bed with hoses to maintain positive pressure inside bed like Roadkill's backyard supercharging episode
Any ideas? Again, new to trucks, I had no idea that toppers without forward facing glass were even a thing. I like the concept of it though; I can keep the AC on, open the rear window, and now my doggo isn't in an oven.
Type 540 is what I have
The biggest issue at the moment is the compression seal/compression boot between the topper and the cab; the lower radius does NOT match the shape of the window. When I installed the topper, I used ratchet straps through the front windows to pull the topper forward tightly, but it isn't enough.
Water will run down the outside edges, then wrap inwards and come in the bed where the seal joins together in the middle. It actually pools up a bit in the center of the seal, when you're inside the truck.
I sketched a quick diagram of the situation and attached it.
Options as I see it:
1: Remove topper, apply giant bead of silicone, reinstall and hope for the best
2: Remove topper, remove seal from topper, grind out lower corners to more closely match radius of rear window, spend $75 on new, slightly longer seal, reinstall
3: Attach trailer full of gasoline leaf blowers connected to bed with hoses to maintain positive pressure inside bed like Roadkill's backyard supercharging episode
Any ideas? Again, new to trucks, I had no idea that toppers without forward facing glass were even a thing. I like the concept of it though; I can keep the AC on, open the rear window, and now my doggo isn't in an oven.