Heat shield - Alfa Romeo Bulletin Board & Forums
 4Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 19 (permalink) Old 02-11-2019, 02:28 AM Thread Starter
Registered User
 
Karter7's Avatar
 
Join Date: Dec 2017
Location: Sydney, Australia
Posts: 86
Heat shield

I removed my exhaust heat shield as per attached photo for shipping to Australia as it appeared to be covered in a asbestos mat (inside of shield). Car is a 1963 101 spider.
A couple of questions:
1) is the matting usually asbestos?
2) what have you used in leiu as original shield is pretty curvy?
Thanks in advance
Daniel
Attached Images
 

Last edited by Karter7; 02-11-2019 at 02:30 AM. Reason: Added text
Karter7 is offline  
Sponsored Links
Advertisement
 
post #2 of 19 (permalink) Old 02-11-2019, 04:28 AM
GTD
Registered User
 
GTD's Avatar
 
Join Date: Apr 2004
Location: New Hampshire
Posts: 2,507
1) is the matting usually asbestos?

Yes

2) what have you used in lieu as original shield is pretty curvy?

Mineral wool products can be used but in reality, it is generally unnecessary .. the aluminium shield itself is sufficient to reflect the heat from the exhaust pipes.

As this area tends to accumulate road grime, it is easier to keep clean when there is a simple metal shield in place.

Alfa Sapiens
GTD is offline  
post #3 of 19 (permalink) Old 02-11-2019, 08:50 AM
Senior Member
Gold Subscriber
 
Lokki's Avatar
 
Join Date: Oct 2009
Location: Dallas Texas
Posts: 1,693
Garage
I have had good results with this company’s products

https://www.heatshieldproducts.com/a...ermal-barriers

71 Spider
Lokki is offline  
Sponsored Links
Advertisement
 
post #4 of 19 (permalink) Old 02-11-2019, 11:38 AM Thread Starter
Registered User
 
Karter7's Avatar
 
Join Date: Dec 2017
Location: Sydney, Australia
Posts: 86
Quote:
Originally Posted by GTD View Post
1) is the matting usually asbestos?

Yes

2) what have you used in lieu as original shield is pretty curvy?

Mineral wool products can be used but in reality, it is generally unnecessary .. the aluminium shield itself is sufficient to reflect the heat from the exhaust pipes.

As this area tends to accumulate road grime, it is easier to keep clean when there is a simple metal shield in place.
How do I safely remove the asbestos matting from thr shield which I still have?
Karter7 is offline  
post #5 of 19 (permalink) Old 02-11-2019, 11:50 AM
Darth Moderator
Platinum SubscriberModerator
 
AlfistiSA's Avatar
 
Join Date: Nov 2003
Location: Port Elizabeth, South Africa
Posts: 3,313
Hi Karter

Yes as the others have said, the original material is an asbestos woven mat - if it is intact and not powdering, then it's about as stable & inert as it's likely to get - years of dirt, oil & grime helps to bind it together. If you do clean it, then try just spraying a degreaser onto the mat & lightly washing it while wearing a face mask. Asbestos is nasty stuff if reduced to powder form and spread about in the air where you are breathing. In this matting & old roof sheets etc, it's basically inert until you start fiddling with it. Once you start scratching at the matting you will break down the fibers and release powdered asbestos into the air - this is illegal in your country & mine.... the laws and costs involved in disposing of asbestos are onerous, this is a case of "if it is't broken, then don't fix it" Please do take all precautions around it anyway.

I remake these from aluminium sheeting & use a modern self adhesive heat reflective & protective matting on the rear which is then further held into position by crimping over the edges. Yes it's got quite an S curve, it needs this to get around the exhaust branches, but when new the aluminium was quite soft so easily bent into shape by hand. 60 years later it's work hardened due to heat & vibration so not so easy to bend, whereas the new ones are soft and bend really easily. They will work harden over time.

Ciao
Greig
Karter7 likes this.

Some 750's
Some 101's
Some 105's
Some others
AlfistiSA is offline  
post #6 of 19 (permalink) Old 02-11-2019, 11:52 AM
GTD
Registered User
 
GTD's Avatar
 
Join Date: Apr 2004
Location: New Hampshire
Posts: 2,507
Unless it was in ratty condition .. I would use it as is.

If you find you really must remove it, a hot pressure washer jet should peel it off without difficulty.
DO NOT attempt to sand or grind it off.

It may be easier to simply duplicate it.
I use stainless steel for re-pops .. it survives better than the aluminum original.
Karter7 likes this.

Alfa Sapiens
GTD is offline  
post #7 of 19 (permalink) Old 02-11-2019, 12:07 PM Thread Starter
Registered User
 
Karter7's Avatar
 
Join Date: Dec 2017
Location: Sydney, Australia
Posts: 86
Quote:
Originally Posted by AlfistiSA View Post
Hi Karter


I remake these from aluminium sheeting & use a modern self adhesive heat reflective & protective matting on the rear which is then further held into position by crimping over the edges. Yes it's got quite an S curve, it needs this to get around the exhaust branches, but when new the aluminium was quite soft so easily bent into shape by hand. 60 years later it's work hardened due to heat & vibration so not so easy to bend, whereas the new ones are soft and bend really easily. They will work harden over time.

Ciao
Greig
Hi Greg,
I think Iíll remake as I donít want to go near the old shield then.
What thickness alloy did you use?
Thanks in advance
Regards Daniel
Karter7 is offline  
post #8 of 19 (permalink) Old 02-12-2019, 10:11 AM
Darth Moderator
Platinum SubscriberModerator
 
AlfistiSA's Avatar
 
Join Date: Nov 2003
Location: Port Elizabeth, South Africa
Posts: 3,313
The original I copied was a little under 0.8mm, I've use the same or slightly thinner. I found thicker sheet too difficult to bend around the pipes and still make sure that it's not touching the branches.

I haven't tried stainless yet, will do that on the next one

Ciao
Greig
Karter7 likes this.

Some 750's
Some 101's
Some 105's
Some others
AlfistiSA is offline  
post #9 of 19 (permalink) Old 02-12-2019, 04:18 PM
Registered User
 
Join Date: Jul 2009
Location: FLORIDA
Posts: 527
I know you nsaidyou wont remove it yourself, but if you do wear a face mask, eye protection, gloves, hat, and after you finish put your clothing and hat in the washer by them self and shower and wash your hair
and you should be ok
alfajohn is offline  
post #10 of 19 (permalink) Old 02-13-2019, 09:10 PM Thread Starter
Registered User
 
Karter7's Avatar
 
Join Date: Dec 2017
Location: Sydney, Australia
Posts: 86
Quote:
Originally Posted by alfajohn View Post
I know you nsaidyou wont remove it yourself, but if you do wear a face mask, eye protection, gloves, hat, and after you finish put your clothing and hat in the washer by them self and shower and wash your hair
and you should be ok
Hi Alfajohn,
I pulled the heat shield off the car and double bagged it. Iíll make a new one out of alloy sheet.
I did use a face mask and gloves as a precaution but the matting is intact.

I just feel if you attempt to remove the asbestos from the heat shield there is a greater chance of spreading asbestos everywhere.
Even if you pressure blast it off, it will dry out and be everywhere. Not worth the risk in my opinion.
Thanks for the advice
Regards Daniel
Karter7 is offline  
post #11 of 19 (permalink) Old 02-15-2019, 09:04 PM
Registered User
 
Join Date: Jun 2013
Location: Sydney
Posts: 145
My car was missing the shield.
Can someone post some photos, taken in various directions, of what the shield looks like.
I'll then fabricate one
Thanks, Mick

Fulvia 1600HF, Fulvia Sport Zagato (project), Giulia Spider Veloce (project)
OMWattsy is online now  
post #12 of 19 (permalink) Old 02-16-2019, 11:04 AM
Registered User
 
Join Date: Jul 2006
Location: Novato, California USA
Posts: 21
Hi Mick,
I made this pattern from a friend's Giulia Spider for my car along with material and fabrication suggestions from Bill Gillham. I cut old manila file folders to 8.5x11 inches and printed them out on the inkjet printer. Very easy to cut out of aluminum sheet. I may or may not pinch in heat barrier fabric.
Matthew Fox
1962 Giulia Spider
Attached Images
  
alfa62fox is offline  
post #13 of 19 (permalink) Old 02-16-2019, 05:50 PM
Registered User
 
Join Date: Nov 2006
Posts: 17
zircoflex III

found that Zircoflex III was ideal. flexible yet self supporting. also it is a single material unlike aluminium with heat resistant additional coatings
https://www.zircotec.com/zircoflex/
cheers
mike
mikegoldthorpe is offline  
post #14 of 19 (permalink) Old 02-16-2019, 05:56 PM
Registered User
 
Join Date: Nov 2006
Posts: 17
zircoflex III

used Zircoflex III for shield. flexible yet self supporting and is a single product unlike having to treat aluminium with heat absorbing additions
https://www.zircotec.com/zircoflex/
cheers
mike
mikegoldthorpe is offline  
post #15 of 19 (permalink) Old 02-16-2019, 07:04 PM
Registered User
 
Barn101's Avatar
 
Join Date: Dec 2017
Location: In the snow belt of Ohio
Posts: 164
Quote:
Originally Posted by OMWattsy View Post
My car was missing the shield.
Can someone post some photos, taken in various directions, of what the shield looks like.
I'll then fabricate one
Thanks, Mick
Mick, here are some of my original '61 shield. They should give you an idea of the dimensions & angles with the above template. Hopefully they help you.
Attached Images
    
Barn101 is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
GTV Heat Shield angiegtv GT (1963-1977) 2 12-30-2017 04:11 AM
750-101(1600) heat shield question concept 101 Giulietta & Giulia (1954-65) 2 05-22-2017 05:46 AM
Heat Reduction Project 84gtv63l Alfetta & GTV6 (1972-1986) 11 10-06-2014 06:08 PM
replacement heat shield experience Bjorn S Spider - 105 & 115 Series (1966-1994) 31 05-09-2014 05:41 AM
S4 Heat Shield Mounting Points Vintre Spider - 105 & 115 Series (1966-1994) 16 02-14-2014 03:24 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome