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Author Topic: Floor drain plug direction - face up or down?  (Read 2854 times)
DAVEN1256
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« on: January 05, 2014, 09:56:21 PM »

I have a new trunk floor and main floor and am wondering which way the six floor drain hole covers face? Does the the raised area in the middle of the drain hole cover face up....or down...or depend on which hole you are covering? Or does it depend on which direction the lip around the edge of the drain hole faces....up or down? My original floors and plugs are long gone and I don't remember.

All six drain holes in my original main and trunk floor were stamped with the lip around the edge facing down. On my repro floor, the drain holes in front of the front seats are stamped like the original, with the lip facing down.  The two drain holes in front of the rear seat are stamped with the lip facing up, however.

Each of the two drain holes in my new trunk floor have two screw holes at opposite corners. The other four holes do not.

So based on the info given, which way should I place my drain hole covers?....................And also, is it correct that each trunk floor cover is screwed in as well and seam sealed.....or should those holes not be there.

 Thanks Dave





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Mike S
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« Reply #1 on: January 05, 2014, 10:31:32 PM »

 I can only tell you from looking at my two '67's that they have the center of the plug facing up into the passenger and trunk area. Also, the trunk is only secured with seam sealer. I have never seen them screwed in.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
69Z28-RS
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« Reply #2 on: January 05, 2014, 11:26:09 PM »

I have a new trunk floor and main floor and am wondering which way the six floor drain hole covers face? Does the the raised area in the middle of the drain hole cover face up....or down...or depend on which hole you are covering? Or does it depend on which direction the lip around the edge of the drain hole faces....up or down? My original floors and plugs are long gone and I don't remember.

All six drain holes in my original main and trunk floor were stamped with the lip around the edge facing down. On my repro floor, the drain holes in front of the front seats are stamped like the original, with the lip facing down.  The two drain holes in front of the rear seat are stamped with the lip facing up, however.
Each of the two drain holes in my new trunk floor have two screw holes at opposite corners. The other four holes do not.
So based on the info given, which way should I place my drain hole covers?....................And also, is it correct that each trunk floor cover is screwed in as well and seam sealed.....or should those holes not be there.

I'm not totally certain I understand what you are asking, but for certain the covers should 'lay in' the locations from above (ie. from inside the car) so they don't fall off/out.   The indentation should go 'down' from what I recall..  ie. should be convex from below, and concave from above.
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
Sauron327
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« Reply #3 on: January 06, 2014, 06:54:37 AM »

http://www.camaros.org/forum/index.php?topic=2438.15 Domes face up. No screws on these cars. Fusor 800EZ is close to original color of sealant.
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JohnZ
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« Reply #4 on: January 06, 2014, 12:07:05 PM »

The plugs were installed dome-side-up after the prime oven, on the sealer deck (where all the sealer operations were done); sealers were set in the following sealer oven, followed by color topcoat.
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'69 Z/28
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69Z28-RS
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« Reply #5 on: January 06, 2014, 12:59:00 PM »

JohnZ....    once again you've had to correct a 'quick statement' I made.. My apologies to anyone reading my error. 
My memory is such that I should have checked my photos made of my floor before posting..  Smiley    (but it was late last night - my only excuse).   
Attached below is a photo I extracted from a photo I made of my floor when cleaning... which clearly shows the concave side DOWN, (dome side up) as you stated..
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
DAVEN1256
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« Reply #6 on: January 06, 2014, 05:30:17 PM »

Thanks to everyone for the info so far.

I am clear now that the raised center of the plug faces up.

I am a little fuzzy now about what the plugs should look like when looking at the bottom of a correctly finished car.

Did the bottom of the car have it's final coat of paint (not including body color over spray) when the plugs were installed?

If so, you would see the plug (in bare metal?) and the seam sealer.......both with no paint on them? Is this correct?
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Mike S
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« Reply #7 on: January 06, 2014, 05:59:48 PM »

 The plugs were installed after the body was primed, but before the body was top coated. So you can have varying degrees of over spray to no over spray. Afterwards the trunk interior was painted and the plugs covered with splatter paint.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
68camaroz28
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« Reply #8 on: January 06, 2014, 09:39:59 PM »

Thanks to everyone for the info so far.

I am clear now that the raised center of the plug faces up.

I am a little fuzzy now about what the plugs should look like when looking at the bottom of a correctly finished car.

Did the bottom of the car have it's final coat of paint (not including body color over spray) when the plugs were installed?

If so, you would see the plug (in bare metal?) and the seam sealer.......both with no paint on them? Is this correct?

A little side note: Are you using new plugs and what is the finish? There are two versions sold, one clear zinc and the other a more galvanized look which IMO is more correct. When ordering one needs to call and find out which one they sell and in some cases they handle both versions so one needs to communicate which one you prefer.
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
DAVEN1256
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« Reply #9 on: January 06, 2014, 09:56:54 PM »

I bought them from AMD already. I am holding one in the picture above. Maybe someone can tell me what finish it is....and how correct it looks?

Thanks.....Dave
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69Z28-RS
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« Reply #10 on: January 06, 2014, 10:18:50 PM »

It appears galvanized to me.. and looks pretty correct.....
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
68camaroz28
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« Reply #11 on: January 06, 2014, 10:32:48 PM »

It appears galvanized to me.. and looks pretty correct.....


Could be Gary but it does not have a definite hot galvanized look to me but for sure is better than the clear zinc ones that just look like shiny silver plates. This one is the closest I've seen but it would be nice to compare side by side.  Even these types are too shiny to my taste but I checked with people who hot galvanize to have my originals re-plated and they needed a hook hole drilled and the thin plate was going to probably warp due to the temp's. It seems the original plugs were punched/pressed out of hot galvanized sheet steel. Hard part to really duplicate finish correctly.
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
Mike S
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« Reply #12 on: January 06, 2014, 10:43:27 PM »

 That gloss look on the galvanized plug will dull over time just like the originals.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
DAVEN1256
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« Reply #13 on: January 07, 2014, 08:45:59 AM »

Here is another picture of mine from the other side. Not hot dipped galvanized looking......but not plain steel either.

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69Z28-RS
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« Reply #14 on: January 07, 2014, 10:12:11 AM »

The ones in my car (one shown in a pix earlier) have never been removed, did not get much paint in the factory (if at all), and do not exhibit any rust at all, not even surface rust, and that is pretty amazing unless there is some type of very good anti corrosive used in the factory.   they do not appear to be zinc, and I agree that it doesn't really have the typical galvanize look either.. so what are the alternatives for the original anti corrosive coating?  phosphate? or ??
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
68L30
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« Reply #15 on: January 07, 2014, 02:57:44 PM »

If you want to get technical, they should have a date stamp in the center of the raised portion as well.


Steve 
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68camaroz28
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« Reply #16 on: January 07, 2014, 06:09:07 PM »

If you want to get technical, they should have a date stamp in the center of the raised portion as well.


Steve 
Steve, many of the plates were not stamped and I thought the stamping was really unknown to meaning, i.e. not a date stamp! Please correct me on the stamping if incorrect.
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
68L30
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« Reply #17 on: January 07, 2014, 07:57:12 PM »

The ones I have seen are usually stamped. Mine were, and the markings are consistent with my other sheet metal stampings, namely my rear quarters, deck lid and doors. Is this the norm? I've not researched it enough to give you a strong enough answer. I've parted many cars and have seen many dates. It's always best to restore what you have found. My experience, the codes/ dates are there. Most often, they are in such poor condition most would overlook them. They depths can vary. I'll post a pic when its not arctic in my garage.


Steve 
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69Z28-RS
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« Reply #18 on: January 07, 2014, 09:19:45 PM »

*L* well Steve...    in the words of many a youngster...   'You made me look!'...   Smiley
there was one I could get to in my trunk (the one that was loose and which I'd laid in upside down.. helping me understand why I said 'dome down' in an earlier post!!~  Smiley     and after a little cleaning, I did see a '38'.. can't tell if more was there, but if that's a 'week of the year', then it corresponds very well with my 3rd week of September (69) build week.   I guess that will serve as my 'new Camaro information learned today'.. Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
68camaroz28
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« Reply #19 on: January 07, 2014, 10:04:25 PM »

Four of my 6 had no stampings. I have looked through many plates of a guy who parted out 67-69 Camaros and found them both ways.  Even observed a few with two small holes and noted they seemed to be found in the trunk area but that was only two cars so might have been just a coincidence. I thought I had in my files that the stampings were never decoded to meaning and was a supplier in house thing but HuhHuh
http://www.camaros.org/forum/index.php?topic=7606.0
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
69Z28-RS
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« Reply #20 on: January 07, 2014, 10:25:21 PM »

it seems to make sense that they would be stamped with week of productionl.. and that some would be stamped so lightly as to not be visible, or be very hard to read after 40 yrs...?
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
68camaroz28
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« Reply #21 on: January 07, 2014, 10:47:08 PM »

it seems to make sense that they would be stamped with week of productionl.. and that some would be stamped so lightly as to not be visible, or be very hard to read after 40 yrs...?

It would be interesting to note stampings as "H" sure seems to be the first letter used in many. Looking at stamped plugs some for sure seem to have been roll-marked, meaning a mechanical stamper was used which rolls circular to stamp. Used in high volume stamping!
http://www.camaros.org/forum/index.php?topic=2438.0;all
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
Sauron327
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« Reply #22 on: January 08, 2014, 04:36:35 PM »

Plugs with holes apply to Pontiac. All were secured with sealer and hardware on the LeMans/GTO bodies I have. Stamped with H also.
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69Z28-RS
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« Reply #23 on: January 08, 2014, 04:57:13 PM »

it seems to make sense that they would be stamped with week of productionl.. and that some would be stamped so lightly as to not be visible, or be very hard to read after 40 yrs...?

It would be interesting to note stampings as "H" sure seems to be the first letter used in many. Looking at stamped plugs some for sure seem to have been roll-marked, meaning a mechanical stamper was used which rolls circular to stamp. Used in high volume stamping!
http://www.camaros.org/forum/index.php?topic=2438.0;all
I left my plug that was loose, sit in a solvent last night, and took another look today.   The stamping on it is   'H 3 6'..  my car was build week 38...    (what does the H represent?..  the mfg?)..
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
68L30
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« Reply #24 on: January 08, 2014, 08:03:32 PM »

Here are my plugs and rear quarters, I'll have to dig up more shots come spring of my deck lid, rear body panel, outer wheel housings, doors, but they are all in the same ball park...28, 29, 30. All my numbers seam to be tight.

Steve
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68L30
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« Reply #25 on: January 08, 2014, 08:04:23 PM »

more...

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NoYenko
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« Reply #26 on: January 08, 2014, 08:28:53 PM »


I left my plug that was loose, sit in a solvent last night, and took another look today.   The stamping on it is   'H 3 6'..  my car was build week 38...    (what does the H represent?..  the mfg?)..
[/quote]
Gary, I believe it was John H mentioned the letter designated the stamping plant it was produced at. George
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Sauron327
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« Reply #27 on: January 08, 2014, 08:52:32 PM »


I I believe it was John H mentioned the letter designated the stamping plant it was produced at. George
That info is on CRG's numbers decoding page. And yes, John Z has spoken about it.
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68camaroz28
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« Reply #28 on: January 08, 2014, 09:43:03 PM »


I I believe it was John H mentioned the letter designated the stamping plant it was produced at. George
That info is on CRG's numbers decoding page. And yes, Johm Z has spoken about it.
http://camaros.org/numbers.shtml#sheet
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
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