69 Quarter Louver Fit

69-er · Oct 12, 2011

I just did a test fit by placing the louvers over the sheetmetal louver indentations and noticed that they didn't seem to align very well. If I line up the vertical bars to the sheetmetal indentations, the tops and bottom aren't horizontal. The top looks worse than the bottom.

I can't be sure if it's the louvers or the sheetmetal indentations are crooked. Has anybody run into this problem?

Larry

ZLP955 · Oct 12, 2011

Larry, is the passenger side the same, or is the fit better there? Looking at the rocker seam and inner wheelhouse spotwelds, how much bodywork has been done in that area? What is original/GM and what is repro (including the louvre itself) and what brand?

69-er · Oct 12, 2011

Both sides are pretty much the same. Both quarters have been replaced from an unknown manufacturer. The louvers are repro from Ground Up/Corvex. I also noticed that the top and bottom horizontal bars are not parallel.

I have an original louver stashed away for 30 years I need to find as a comparison.

stamatisg1977 · Oct 13, 2011

just a hunch but did you try flipping them over??

ZLP955 · Oct 13, 2011

stamatisg1977 said:
just a hunch but did you try flipping them over??

Ah you mean flip upside down and swap driver's to passenger's sides.... that could be it, but they look the right way up in the photo. The pic below shows that the shape of the dark section between the chrome ribs is more curved at the top and angular at the bottom....

gphusker · Oct 13, 2011

I think you are on to something there. The do look like they are on the wrong side to me, just my opinion. I just installed Corvex louvers on my 69, and the only problem I had is that the way they are made its impossible to get them to fit tight up against the body. Its not really noticable from a casual viewing standpoint, but anyone that knows their stuff will notice it.

stamatisg1977 · Oct 14, 2011

ZLP955 said:
Ah you mean flip upside down and swap driver's to passenger's sides.... that could be it, but they look the right way up in the photo. The pic below shows that the shape of the dark section between the chrome ribs is more curved at the top and angular at the bottom....

yes. its also good to know that sometimes companies post pics of products and they dont even know what side is up

69-er · Oct 14, 2011

On the theory that they might fit on the opposite sides; that's a no go. You see they curve away from the wheel well opening, not with it. Soon as I find my original one I will be able to tell if they are mad wrong.

ZLP955 · Oct 15, 2011

69-er said:
On the theory that they might fit on the opposite sides; that's a no go. You see they curve away from the wheel well opening, not with it. Soon as I find my original one I will be able to tell if they are mad wrong.

Larry, Steven's suggestion was that the louvres went other way up and swapped sides of the car - that way they would curve the correct way. Well worth trying!

69-er · Oct 29, 2011

OK, so I also decided to get the mounting templates to see if this might settle this. The upper and lower bars on the drawings match the actual louver bars on the Corvex ones, but the stud holes on the drawing don't match the actual louver studs. They are off as much as 3/16". That's more than enough to affect the alignment, I wouldn't know which holes to elongate to allow the louver to install properly on the quarters.

I don't know which is wrong, the templates, the louvers, or both! I think I will return both and regroup here.

BTW, I did a Google image search and came up empty there too.

Has anybody else had a chance to look at theirs?

6781camaro · Oct 29, 2011

I have several pairs of originals and one new pair of Corvex louvers. I test-fit them both in my original quarters before removing them from the car and they fit dead on... both brands. Sounds like you may need to exchange them for a another pair.

I can measure my Corvex pins from one another and let you know if you'd like.

L30 327 · Oct 29, 2011

I used the templates and corvex. The driver side went on perfect but the pass. side seemed to have one stud that did not that was not quite lined up perfect. I was really freaked,did not want to screw up orig. gm quarter. Luckily I was able to slot it slightly and get the stud in. Not perfectly flush but pretty good,compaired to the ones I was replacing. The early 90's ones were really bad.

stamatisg1977 · Oct 29, 2011

if i were you and since your quarters and louvers are not original, i would grind the pins down flat, weld the holes up on the quarters and use 3M emblem tape to put them on. that way if they fit nice and the pins are not lining up doing this method will give you 100% wiggle room

69-er · Oct 29, 2011

6781camaro said:
I have several pairs of originals and one new pair of Corvex louvers. I test-fit them both in my original quarters before removing them from the car and they fit dead on... both brands. Sounds like you may need to exchange them for a another pair.

I can measure my Corvex pins from one another and let you know if you'd like.

Thanks, I'd appreciate that.

If you could also look at the top and bottom bars of the originals to see if they are parallel to each other, that would help too.

69-er · Oct 29, 2011

stamatisg1977 said:
if i were you and since your quarters and louvers are not original, i would grind the pins down flat, weld the holes up on the quarters and use 3M emblem tape to put them on. that way if they fit nice and the pins are not lining up doing this method will give you 100% wiggle room

I though about that, but because until the pins are removed, I can't tell how well they would fit. Until I determine if they are shaped correctly, I don't want to modify them in case I return them.

stamatisg1977 · Oct 29, 2011

69-er said:
I though about that, but because until the pins are removed, I can't tell how well they would fit. Until I determine if they are shaped correctly, I don't want to modify them in case I return them.

if the pins are in the way of getting a good look at how the contours match with the panel you can always check by flipping the louver around so that the pins face out and i think you would have to use the drivers louver on the pass panel so that this method works

6781camaro · Oct 30, 2011

69-er said:
Thanks, I'd appreciate that.

If you could also look at the top and bottom bars of the originals to see if they are parallel to each other, that would help too.

I'll get to it first thing tomorrow morning. It's a garage day for me all day!:hurray: But! not the garage day I am hoping for.:noway: I need to do a 4-wheel brake job, oil and air filter change on my Sienna van instead. :sad:

Stay tuned for the measurements.

rbs67cam · Oct 30, 2011

i had to actually grind of the back side of the louver where there is to much material so it would set flush with the qtr just take your time and take your time and take alittle at a time and test fit every time you grind to get it right.

6781camaro · Oct 31, 2011

Here ya go Larry... (I made a quick non-technical sketch with the measurements below)

Remember-- these drawings are of the back sides of the louvers which face the body (so they are flipped over on my workbench when I drew them) I measured center-to-center of each pin in all 4 directions for you...

"PINS FACING UP TO THE CEILING" :thumbsup:

These are original GM parts... #8724408-R and #8724409-L

ZLP955 · Oct 31, 2011

Todd - just measured the holes in my original quarters and both sides match your sketch dimensions exactly.

69 Quarter Louver Fit

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