Vapor Barrier behind new door panels?

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AuroraGirl

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Grit dog said:
I don’t understand what you’re explaining.
Click to expand...
Grit dog said:
I don’t understand what you’re explaining.
Click to expand...
mass on flimsy thin steel panels can help reduce noise transmission. because its adhesive back and thick, its not as good as a dedicated product for this job (commercial products exist for this) , but its about the only thing it would be good for if you already have a plastic barrier in the door.

Think of the noise the door makes when closing , a tinging. instead if you had enough mass on the door it would be a thud, then when driving at speed youre not gonna have as much oil canning. the cab would still do it but its reduced quite a bit considering the doors are the ventilation sources already (worth checking on too, btw) and the door is sealed to the outside around it and the windows have to seal. so already an area where wind noise is expected as a function
 
AuroraGirl

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WIND WHISTLE IN CAB WITH BLOWER ON "HIGH"

Model and Year: 1983-85 C/K TRUCKS WITH -------------- SILVERADO TRIM (RPO YE9)​



TO: ALL CHEVROLET DEALERS​



Some C/K Silverado Trucks may exhibit a wind whistling noise in the area of the vent window or the side door glass lower seal when the HVAC blower is on "high".

This condition is the result of a restriction in air flow from the cab interior to the outside environment. The following procedure will improve the air flow and eliminate the whistle.

1. Remove lower door trim panel, exposing louvers at the bottom of the door.

2. Unscrew the two screws retaining the air valve assembly behind door louvers. Let the valve assembly drop to the bottom of the door.

3. Use a die grinder with a cut-off wheel to cut the louvers out of the door. Remove any material falling inside the door.

4. Smooth any rough edges with a file.

5. Paint exposed metal edges to prevent corrosion.

6. Reinstall air valve assembly.

NOTE: It is imperative that the air valve assembly is not damaged and ---- that it is reinstalled correctly. Failure to do so could result in cold air and/or exhaust fume entry into the cab.​



7. Reinstall lower door trim panel.

The time required to perform the above service procedure on two doors is 0.4 hours.

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AuroraGirl

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Subject: WIND NOISE/COLD AIR INTRUSION AT DOORS​



Model and Year: 1985-86 C/K TRUCK 1987-89 R/V TRUCK​



TO: ALL CHEVROLET DEALERS​



Wind noise and/or cold air intrusion through front or rear door handles and switches, may be experienced in some 1985-86 C/K, AND 1987-90 R/V model pick ups, Blazers and Suburbans. New seal assemblies are now available to prevent wind noise and/or air intrusion. Part numbers are listed below:

SERVICE PARTS INFORMATION

Description Part number Application Quantity ----------- ----------- ----------- -------- PRIMARY SEAL (CLEAR)

L front door seal asm 15647015 All models 1 per door R front door seal asm 15647016 All models 1 per door L rear door seal asm 15647017 R/V Suburban 1 per door and Crew Cab R rear door seal asm 15647018 R/V Suburban 1 per door

SECONDARY SEAL (FOAM)

Top seal L and R front 00363139 All models 1 per door (30.0 inches) Lower seal L and R front 00363139 All models 1 per door (45.0 inches) Top seal L and R rear 00363139 R/V Suburban 1 per door and Crew Cab (24.0 inches) Lower seal L and R rear 00363139 R/V Suburban 1 per door and Crew Cab (45.0 inches)

Parts are currently available through GMSPO.

Note: Part number 00363139 is available in 45 inch lengths, which must be cut as indicated. This part requires special installation to insure proper sealing. Top seal must be installed on the outboard side of the the lock hole (see Figure 1).
You must be registered for see images attach
Lower seal must be installed on the same side as the extended rib (see Figure 2).
You must be registered for see images attach
To install remove backing and apply to a clean dry surface.​



VIN BREAKPOINT​



1990 R/V vehicles built after the following VIN breakpoint has the new seal assemblies incorporated into production.

LF132240

SERVICE PROCEDURE​



The installation/removal procedures are as follows:

Tools required:​



J9886-01 Door handle clip remover. J24595-B Door trim pad clip remover.

REMOVE OR DISCONNECT (see Figures 3-6)​


You must be registered for see images attach

1. Remove window regulator handle using J9886-01 (see Figures 3 and 4) 2. Remove lock knob. 3. Remove arm rest bracket screws (91). 4. Remove arm rest from the rest of the door. 5. Remove strap assembly covers (if equipped). 6. Remove strap assembly screws (if equipped). 7. Disconnect strap assembly (if equipped). 8. Remove inside door arm rest plate. 9. Remove inside door handle assembly and rod. 10. Remove door trim panel to door retainers using J24595-B (see Figure 5). 11. Disconnect all electrical connections to door trim panel (if equipped with power locks and/or windows).

NOTE: Pry the tops of the panel away from the side seal clips.​



INSTALL OR CONNECT (see Figures 1-7)​



Note: Check that all the trim retainers are securely fastened, and are not damaged. Replace damaged fasteners.​

You must be registered for see images attach


1. Clean the area where the seal will be applied with a grease or wax remover. 2. Install new style seal assembly (see Figure 7). 3. Install top and lower foam seals (see Figures 1 and 2). 4. Connect all electrical connections to door trim panel (if equipped with power locks and/or windows). 5. Install door trim panel onto the door side window seal clips. 6. Install inside door handle assembly and rod. 7. Install door trim retainers into the door panel. 8. Install door trim panel to door screws (22). 9. Install strap assembly covers (if equipped). 10. Install strap assembly screws (if equipped). 11. Install strap assembly (if equipped). 12. Install arm rest to the door. 13. Install arm rest to arm rest bracket screws (91). 14. Install manual door lock knob. 15. Install window regulator handle.
 
Sgt Gus

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Our 87 silverado definitely has the wind whistle. I screen shot the disassembly and assembly instructions. That could be useful later. I'll add to the clip board for future to do's when we get to weather stripping and door seals etc.
 
Grit dog

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AuroraGirl said:
mass on flimsy thin steel panels can help reduce noise transmission. because its adhesive back and thick, its not as good as a dedicated product for this job (commercial products exist for this) , but its about the only thing it would be good for if you already have a plastic barrier in the door.

Think of the noise the door makes when closing , a tinging. instead if you had enough mass on the door it would be a thud, then when driving at speed youre not gonna have as much oil canning. the cab would still do it but its reduced quite a bit considering the doors are the ventilation sources already (worth checking on too, btw) and the door is sealed to the outside around it and the windows have to seal. so already an area where wind noise is expected as a function
Click to expand...
Gotcha. Sound deadening material.
I was trying to equate what you were saying to this thread about vapor/wind barrier.
I had no idea they used to make an adhesive piece of plastic like you posted above.
Makes sense, the 86 has air coming thru the drivers door handle.
Odd that it’s only that door and that truck. Neither the 86 or 77 have that big wind blocking piece you posted. But it’s only 1 of 4 doors that does it.
 
AuroraGirl

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Grit dog said:
Gotcha. Sound deadening material.
I was trying to equate what you were saying to this thread about vapor/wind barrier.
I had no idea they used to make an adhesive piece of plastic like you posted above.
Makes sense, the 86 has air coming thru the drivers door handle.
Odd that it’s only that door and that truck. Neither the 86 or 77 have that big wind blocking piece you posted. But it’s only 1 of 4 doors that does it.
Click to expand...
yes, and i was making originally the comment that the OP buying a giant roll of plastic with adhesive backing, his real only inherent benefit to the roll is to apply it to the door skin and evidently the door panel underneath (just gotta pierce a few spots for the door bits to stick through) , the door skin wont help with the wind or vapor but would minor benefits to sound, the door panel one is probably a bit of thermal insulation / wind noise barrier and dust barrier
 
84GMCSierra

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Does anyone have an original out to show for the pattern? I have some boat wrap plastic that's like shrink wrap I can cut some for my doors
 
Bextreme04

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84GMCSierra said:
Does anyone have an original out to show for the pattern? I have some boat wrap plastic that's like shrink wrap I can cut some for my doors
Click to expand...
I just put the butyl tape around the perimeter of the door, cut a too big piece off the giant sheet I bought, then stuck it to the butyl tape and cut around the outside so that it fit to size. The Butyl tape and sheet of 6mm greenhouse plastic was like ~$40 total on amazon.
 
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