Zed's Slow Crawl into Fall

It's time for another update on the slow-moving restoration effort on the 1979 Datsun 280ZX lovingly called "Zed". Completely unrelated to Zed, Nemo, the 1997 Audi A4 was sold to a family friend. While he is no longer a permanent resident of our driveway, I expect there will be some ShadeTree adventures as he is improved upon.

Where Were We

p-side front fender gap

We entered the Summer with the goal of having Zed painted before the weather changed from warm-dry to cold-wet. Some years, that change happens as late as Halloween. Other years, like 2019, we lose the end of August to things like wildfires or an early rainstorm. With such a wide range for when the end date might hit, I worked a bunch in the early Summer to set myself up for paint. This year, we have had multiple "false-fall" weather periods, and this week looks like solid rain, leading me to believe that the goal will not be reached.

Recall, we hit a snag with CoViD-19 related manufacturing delays on the body kit. I ordered the kit in May, and it delivered in August. During the delay, I perfected the body as best I could, got the final primer shot and clowned on other cars while I waited. Once the kit arrived, I let it sit in the sun on my deck for a couple of weeks to complete the off-gassing while I took a few camping trips. Of course, sitting outside like that allowed the various pieces to get dirty and have nature fall on then, so they are not as pristine-looking as they were on delivery day. Regardless, they need to be sanded, and primed at minimum before painting, so this just added a cleaning step before the sanding.

Front Bumper

d-side front fender gap

To prepare for the front fiberglass bumper install, I first needed to expose the steel bar wrapped inside the chrome and rubber bumper originally installed on Zed. I had removed the bumper, brackets and all, earlier for access to the radiator supports for primer shooting. The bracket-to-body bolts are 17mm, and there are 4 per side. The bracket-to-bumper nuts are 14mm, and, again, there are 4 per side. I addressed the surface rust on the brackets, shot them with the same finish primer and set them aside.

The original / stock bumper cover is held on with a myriad of bolts and screws. The (10mm?) bolts removed easily. The screws were so rusted on, I had to cut them off with a grinder. Once the steel bar was exposed, I could start test fitting the bumper. I spent a while just fiddling with it: setting it on, tilting it at various angles, etc until I could see how I wanted it. I temporarily mounted the front bumper brackets and the steel bar next, and sat the bumper cover on top. The original location of the bar was 1.5" too far forward.

To recess the front bumper, the gas in the mounts needs to be released, and then the bracket pushed backwards into itself. To release the gas, the steel bar needs to be removed and then a Phillips bolt head is exposed. Remove the bolt, and the gas is released. Then, push the end in. I measured the 1.5" and marked it so I knew when I had it in the right spot. At first, the brackets did not want to compress, even with the gas gone. I encouraged them with a rubber mallet and pushed until the bracket compressed to my mark.

Once compressed, I re-attached the steel bar, and then set the new bumper cover on the bar. This time, it set exactly right, though the ends initially appeared much wider than the fenders want to sit (witness the top two pictures). After about an hour of fiddling with it I found that when the ends of the fender rotated upwards (and the fiberglass shifted left-right a little bit, the steel bar readjusted, etc), they were much closer. Still, actual mounting to the fenders will wait until I have the fenders secured firmly. The fender bolts, like most of the others, have disappeared. The internet thinks these bolts should be M6x1, but I could not even start threading that size. They are also not M5x.8 as those fall right through. I tried generic slotted #12-24 machine bolts next since they are effectively "M5.5", though they also fell straight through. I will return to the M6 bolts and see if I just gunked up the threads with primer. Anyway, with the bumper in place, I can see that I will need to open up the turn signal indicator holes a little bit to allow for the lenses and bulbs to be maintained without removing the bumper. Also, I expect there will be some shaping needed where the hood opens since the bumper is 1.5" deeper.

Rear Bumper

The original rear bumper was the only real rust on this car, which is why we tossed it. I sourced a replacement bar and rear mounts from our friend in Hillsboro. After addressing the surface rust on the brackets similar to the front brackets, I acquired nuts to mount the brackets to the rear (M10x1.25) and attached them. I needed a washer between each of the outer holes on the mounts and the body to angle the mounts inward enough to fit the rear bumper. Onto the brackets, I set the steel bar and test fit the rear bumper. Again, the bracket pushed the bumper out too far to fit. So, I repeated the gas-out process, pushing the rear bumper in an inch. Unlike the front, the rear bumper does not provide an easy means of getting your fingers on the mounting nuts and studs. But, with some perseverance, I got one nut on each side so I could see how it set. As good as the front looked, the rear looked even better. The kit snugged into the body contours, as you can see in the picture below.

Setting the Gaps

p-side rear alignment

When C bought this car, it had been messed up by the prior owner in 2 ways. First, he stripped the interior in the interest of saving a few pounds because he wanted a drift car. Second, he drifted the car into something or someone, damaging the driver door and front fender. We replaced the front door with a donor from WA, but tried to straighten the fender. Off the car after many days of working on it, the fender looked great. Once I re-mounted the doors, hood and rear tailgate, however, the gap between the leading edge of the driver door and the trailing edge of the fender could not be resolved. The edge along the front valence (in front of the windscreen) and above the door also did not line up well. The fold in the driver-side fender had erased the trailing edge and attempts to re-establish it by my amateur hands did not get it there. The image below shows how far off the fender-to-door gap is; the misaligned edge above the door is slightly visible. The passenger side, however, gapped perfectly, with about 1/4" along all of the seams of both the door and the fender so I have a target for the driver side. I spent a couple of hours shifting the door around and improved the gap at the top, but the long edge between the fender and the door could not be resolved. I did not reproduce that edge on the fender quite right.

The efforts to straighten the driver fender has been instructive, but, I will be replacing it. Unfortunately, these panels have not been produced in years, so I needed to find one from a donor car and the one I found is not dent-free. Fortunately, the edges are perfect and it aligns properly with the hood, bumper and driver door. So, once the dents above the wheel well are coerced back into place, the panels will be right. I will then set the driver-side gaps so we have a solid base for the kit. Then, I'll finalize the placement of the bumpers.

Bumper Plan

Both the front and the rear bumper will require a little bit of fit and finish. The rear aligns very well, with only some small smoothing needed to achieve the line I am looking for. The front may require more, even after the fender fit has improved, the gaps are larger. I will see how much this gap closes once I send a couple of screws through. I expect I will need to add material to the inner edges of the bumper along the fenders to make it look right. Once I have the front and rear looking as I would like, I will shift to the two side panels that run under the doors between the wheel wells and then priming the kit.

I do not intend to seal the seams between the fender/quarter panels and the front/rear bumpers. Instead, I intend to have a clean, visible, seam line. This way if there is some kind of damage to the fiberglass from parking curbs or a small accident, the repair will not have to extend past that seal line. This also gives me the opportunity to try mixing flex additive into the fiberglass bumper paint. The "flex additive" increases the paint's willingness to bend without cracking. If I sealed the seam and painted the body as a whole, that flexing additive would need to be part of the paint on the seal or further up fender/quarter panel paint. Otherwise, there could be cracking at the seam, forcing the repair into the steel. This way, the bumper can be removed, repaired/replaced, painted and installed.

What's Next

The ultimate question remains: will the car get through paint before the weather changes? No, but I would rather have it look right than be hurriedly finished. First, I need to get the driver fender replacement undented and prepped. Then, I will get the body kit fitting completed with mounting holes drilled, etc. This would allow me to finish the kit separately (clean, sand, Bondo, sand, clean, possibly high-build primer, sand, clean, finish primer, sand, clean, paint) and then mount it when it's ready. I don't expect a weather miracle that would allow me to get all the way to the end of that task list, though. I expect the weather will turn for good before I'm through primer. Actual paint on the body and the kit will have to wait until next year.

Thanks, as always, for following along-