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Old 04-01-2016, 09:28 AM   #1
1972BlueC20
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Firewall Holes, need to plug. Please help!!!

I have 2 holes in my firewall between the little dip in the heater box between the heater core area and the fan motor where 2 hoses used to come through for my aftermarket (original dealer installed) clardy AC knee knocker system.

I no longer have this AC unit, so now I have 2 holes I need to fill.

I have no skill at welding nor do I have the gear.

Seems like I should be able to find some kind of rubber plugs.

I think the diameter is like 1.5 - 2 inches.

Any idea what I can use to plug these holes?

I had black duct tape over them but it was really ghetto haha
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Old 04-01-2016, 09:52 AM   #2
mcbassin
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Re: Firewall Holes, need to plug. Please help!!!

Quote:
Originally Posted by 1972BlueC20 View Post
I have 2 holes in my firewall between the little dip in the heater box between the heater core area and the fan motor where 2 hoses used to come through for my aftermarket (original dealer installed) clardy AC knee knocker system.

I no longer have this AC unit, so now I have 2 holes I need to fill.

I have no skill at welding nor do I have the gear.

Seems like I should be able to find some kind of rubber plugs.

I think the diameter is like 1.5 - 2 inches.

Any idea what I can use to plug these holes?

I had black duct tape over them but it was really ghetto haha
Not sure if this the size you need but, have you looked into Summit yet?

http://www.summitracing.com/parts/sd...FZVahgodjc0HBQ
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Old 04-01-2016, 12:50 PM   #3
1972BlueC20
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Re: Firewall Holes, need to plug. Please help!!!

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Originally Posted by mcbassin View Post
Not sure if this the size you need but, have you looked into Summit yet?

http://www.summitracing.com/parts/sd...FZVahgodjc0HBQ
yes that is what I need, but it doesn't say on the link what diameter the plug is and I still need to measure my holes. But yeah, thats exactly what I was looking for if they have the right size.

Thanks,
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Old 04-01-2016, 01:16 PM   #4
waco
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Re: Firewall Holes, need to plug. Please help!!!

If you cannot find the right size plugs you can pop rivet a piece of sheet metal over the holes with some sealant (paintable & semi-permanent) no major tools required. Tin snips, drill & poprivet set.
Andy
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Old 04-01-2016, 02:15 PM   #5
1972BlueC20
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Re: Firewall Holes, need to plug. Please help!!!

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If you cannot find the right size plugs you can pop rivet a piece of sheet metal over the holes with some sealant (paintable & semi-permanent) no major tools required. Tin snips, drill & poprivet set.
Andy
good option too!


Thanks
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Old 04-01-2016, 05:05 PM   #6
Davidf
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Re: Firewall Holes, need to plug. Please help!!!

Google/Bing "body plugs". Ignore the smut that might come up. Plastic will be your best bet.
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Old 04-01-2016, 07:42 PM   #7
cdowns
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Re: Firewall Holes, need to plug. Please help!!!

go to ace hardware and purchase the right size and go home and pop them in
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Old 04-02-2016, 10:04 AM   #8
Jason Banks
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Re: Firewall Holes, need to plug. Please help!!!

How about something from McMaster Carr - http://www.mcmaster.com/#snap-in-plugs/=11t25qx
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Old 04-02-2016, 11:42 AM   #9
74baggedbug
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Re: Firewall Holes, need to plug. Please help!!!

Quote:
Originally Posted by cdowns View Post
go to ace hardware and purchase the right size and go home and pop them in

Exactly!
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Old 04-02-2016, 02:19 PM   #10
RonG
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Re: Firewall Holes, need to plug. Please help!!!

Quote:
Originally Posted by 1972BlueC20 View Post
I have 2 holes in my firewall between the little dip in the heater box between the heater core area and the fan motor where 2 hoses used to come through for my aftermarket (original dealer installed) clardy AC knee knocker system.

I no longer have this AC unit, so now I have 2 holes I need to fill.

I have no skill at welding nor do I have the gear.

Seems like I should be able to find some kind of rubber plugs.

I think the diameter is like 1.5 - 2 inches.

Any idea what I can use to plug these holes?

I had black duct tape over them but it was really ghetto haha
What I have done is to cut two pieces of metal (one for engine side and one for interior side) slightly larger than existing hole(s). Clamp two pieces together and drill hole for no. 10 bolt about center of existing hole(s) in firewall. Clean with alcohol, apply small bead of rtv and bolt to firewall. No extra holes in firewall, fire proof, weather proof, paintable and semi permanent.
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Old 04-02-2016, 08:09 PM   #11
68panelman
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Re: Firewall Holes, need to plug. Please help!!!

The correct body plugs are out there, just don't drill, sheet metal, pop rivet, silicone, like others have suggested. 2 plugs, Pop them in
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Old 04-03-2016, 07:19 PM   #12
waco
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Re: Firewall Holes, need to plug. Please help!!!

I did an Amazon search, they should have what you need. I used 1.5-2 inch rubber plugs.
Good luck with your search
Andy
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