safulop

The front corner of my chin spoiler is missing bolts where it attaches under the fog lamp; what is the spec of these bolts? Are they sheet metal screws that go up into something waiting for them? Or are there nuts involved?

Sean

jcorenman

There are clips on both sides that attach the spoiler to the lower-lip of the bumper cover, plus three screws per side to assist and secure the spoiler into the clips. They go in from underneath into speed-nuts clipped onto the lower lip of the bumper-cover. The screws are 4.8mm x 16mm hexhead (8mm head), see PET pic below. Those parts are all available, and a 4.8mm screw is the same size as a #10 sheet metal screw.

safulop

Thanks for the pic! See where screw 16 is shown inserted? Mine is good on that side, and someone even added a screw (not shown in pic) to the extra hole in front of it. But on the right side, there is nothing in that spot and the spoiler sags there, and so I'll have to see what can be done. I'll try to get the right sort of screw and shove it in the hole, we'll see what happens. If it ain't so easy, I will have to have a body shop see about it when I get around to it. The spoiler is well-attached at other locations, so shouldn't come off in flight I hope.

polecat702

The clips are riveted to the bottom of the front bumper. the chin spoiler has a lip that slides under the sides of the clip. Yours is prolly out of the clip or the clip part is broken off.

RET

There seem to be two screws that are not accounted for in the diagram. PET indicates that there are six screws that come up from the bottom of the spoiler through counter bores but does not show (at least I have not found a reference....) two additional screws that are located at the very front inner corners of the spoiler and do not have bores in which to set. There are holes in the spoiler (PN 928 505 071 20) at the corresponding locations.

These screws do not fasten the spoiler to the bumper cover, but instead pass through the bumper cover and connect to small metal “L” brackets that are attached to the chassis.

What are these screws, and/or, is there a PET reference?

Tom in Austin

Excellent question, I was messing with my spoiler recently when I had the fender liners out and could look up in there. My "L" brackets came down to within about a 1/2 inch of the spoiler. It appears the bottom of the "L" is meant to have a speed nut but not clear what screw exactly is supposed to come up and meet it.

I drilled a hole right at the front corner of the spoiler (i.e. where it turns back in) and used a trim screw to snug it to the bumper cover. Curiously that screw came up right beneath the bottom of the "L", but of course I made the hole and the factory didn't have a fastener in that location.

Kiwi928S4

Hi Tom

I have just done mine on my 1991S4 and the L brackets have a speed nut 4.8mm at the bottom which the front bumber cover screws up to before you slide the spoiler into place. The spoiler does not have a hole here but effectively covers these two fixings for the bumper cover. The L bracket tensions up the bottom of the cover ensuring that the spoiler fits properly. This is not apparent on the PET diagram - took me a while to figure it out by reading Dwaynes post many times!

Cheers

Kiwi928S4

RET

Kiwi828S4 - Both bumper covers that I have are drilled under the "L" brackets. FWIW, the holes are neatly made, look stock, and show signs of actually having had screws in them..... OTOH, it does not really make sense that they are not countersunk and that the screw heads and any washer would show.....

What kind of washers are used on your '91? Flat, dished...? Do you have a PET reference, and can you provide a link for the reference to Dwayne's work?

Thanks!

jcorenman

And just to add confusion, we recently fitted a new spoiler to our 90GT, and the holes that aligned with the "L" brackets were counterbored, with recessed screws. There were six total (three per side), all counterbored.

On the old/torn spoiler that came off (likely original), the two front "L-bracket" holes were drilled but not counterbored, same as described above.

Here's the PET drawing for the '92-95 GTS, shows the L-brackets which were actually fitted starting a few years earlier-- '89 or '90??

This PET, it is a mysterious thing sometimes...

Tom in Austin

Far out guys, so the L-bracket part # 24 actually fastens to the painted bumper cover and then the spoiler covers the fastener?

safulop

Great, mine attaches at the L-bracket when I screwed a #10 into there. But the other hole where screw 16 is shown in the diagram, I get no purchase on that. I think my spoiler is out of the clips all along that side, I can see it resting on the clips with a slight gap showing. Somebody really bottomed this out at some point, and my body shop did not take care of it properly when I asked them to.

-Sean

RET

Jim - The front most counter bored holes align with the L-brackets? FWIW, my two spoilers (both are 928 505 071 20) have three counter bored holes on each side that align with holes in the bumper cover (with speed nuts to be installed on the bumper cover), but the most forward counter bored holes are some distance from the L-bracket, and there are the two "extra" holes (one on each side) with no counter bores that are aligned with the brackets.

Maybe the brackets are positioned on the chassis differently for the MY?


Sean - Your spoiler might have been dislodged in a parking lot by one of those raised concrete bars that stop the front tire from rolling farther when you park. My previous spoiler happily slid over one or two (or a few) of them on different embarrassing occasions while pulling forward to park, locked onto the far side of the bar as the tire touched, and created varied levels of repair after I backed up......

FWIW, a PIA, but you can remove the wheel well liners to access the various speed nuts and aid in aligning everything. I think that the screw designated #10 in the diagram can only be replaced in this way - I don't know (yet...) as the previous spoiler did not have this screw installed and I have not quite gotten around to putting the replacement on.

jcorenman

No, the screw (#16 in the pic) goes through the spoiler (counterbored hole in the new replacement, simple hole in the original) and through the bumber cover, and into a speednut clipped onto the L-bracket. So the painted bumper-cover is the "ham" in the sandwich.

Yep, good help is hard to find
IF the speednut is in place on the bumper-cover, then you might be able to wiggle the spoiler back into the clips. Removing the couple of screws that secure the bottom of the splash-panel to the spoiler will help. Otherwise the fender-liner and splash panel need to come out.

On the new spoiler, yes. The old spoiler was as you describe, the "L-bracket" holes were simple holes and not counterbored.

And yes, it is quite possible that this was changed through the years. I think this is one area that was very much "hand-built". I also had to add a short spacer (i.e. stack of 3-4 washers) between the L-bracket and the bumper cover, to make it fit properly. But there are signs of repaint around the front so there may be some history there...

Kiwi928S4

Ret and Jim my car is a 1991S4 and the new spoiler is exactly the same as the old one - both do not have a hole for the screws #10g that fasten into the L bracket. The bumper cover itself has the hole for this fixing which is subsequently covered by the spoiler. As I mentioned in my previous post this fixing seems to be there to tension up the bumper cover prior to fixing of the spoiler. The PET diagram posted in this thread is misleading - and took me a while to figure our. Dwaynes thread on this alerted me to this - but it took several readings to understand what was going on. I dont know if this method of fixing is different on the earlier cars? The new spoiler is for the later cars. One further issue I had was the recessed holes in the spoiler are too small for the 15mm washers that come with the fixing screws - just wont go in - so I used the bigger 'mushroom' head black #10 x 19mm screws that you can buy anywhere. Finally for the bumper/L bracket fixing screws I used a 25mm fender fixing washer under the screw to spread the load better over the hole in the bumper cover - you have to push hard up on the cover to engage the screw into the speedclip on the L bracket - you need to have the fender liners out for this with one hand inside feeding the screw into the speedclip and then lining the bracket up before screwing things all the way home.
Cheers

kiwi928S4