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Broken tab on fastback engine vent... by a_bartle
Started on: 02-12-2014 07:50 AM
Replies: 14 (294 views)
Last post by: 2.5 on 02-13-2014 04:22 PM
a_bartle
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Report this Post02-12-2014 07:50 AM Click Here to See the Profile for a_bartleSend a Private Message to a_bartleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Has anyone ever repaired a broken tab? If so, how did you go about it?
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Custom2M4
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Report this Post02-12-2014 08:21 PM Click Here to See the Profile for Custom2M4Send a Private Message to Custom2M4Edit/Delete MessageReply w/QuoteDirect Link to This Post
If I recall correctly... those vents are magnesium. I'm not sure how to weld that metal..

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fierofool
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Report this Post02-12-2014 08:26 PM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
I believe only the 84 and maybe 85 vents were magnesium. Later years were aluminum alloy.
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a_bartle
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Report this Post02-12-2014 09:26 PM Click Here to See the Profile for a_bartleSend a Private Message to a_bartleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yeah, that was my understanding, made out of aluminum. Think a tab could be welded on? Any kind of epoxy that might be used to form a tab?
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fierofool
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Report this Post02-12-2014 09:33 PM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
If it's aluminum, a good TIG welder could do it for you.
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infinitewill
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Report this Post02-13-2014 06:59 AM Click Here to See the Profile for infinitewillSend a Private Message to infinitewillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Which side did you break? I think I have a pristine drivers side I am not using.

Dr. W.

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[This message has been edited by infinitewill (edited 02-13-2014).]

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fireboss
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Report this Post02-13-2014 07:32 AM Click Here to See the Profile for firebossSend a Private Message to firebossEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierofool:

I believe only the 84 and maybe 85 vents were magnesium. Later years were aluminum alloy.


all side engine vents are aluminum,the magnesium vent was the single big center vent mounted only on the 84 rear deck lid...

[This message has been edited by fireboss (edited 02-13-2014).]

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a_bartle
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Report this Post02-13-2014 08:03 AM Click Here to See the Profile for a_bartleSend a Private Message to a_bartleEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's the passenger side.

It's a long story as to "this" vent. I was having mine powdercoated, the guy messed them up, he tried to strip off his powdercoat and ruined my vent. He found this used one to replace it, and I didn't notice the broken tab until I was cleaning it and getting it prepped for paint. Basically I took a bath on the whole powdercoat project.
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infinitewill
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Report this Post02-13-2014 09:12 AM Click Here to See the Profile for infinitewillSend a Private Message to infinitewillEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by a_bartle:

It's the passenger side.

It's a long story as to "this" vent. I was having mine powdercoated, the guy messed them up, he tried to strip off his powdercoat and ruined my vent. He found this used one to replace it, and I didn't notice the broken tab until I was cleaning it and getting it prepped for paint. Basically I took a bath on the whole powdercoat project.


Ouch! Unfortunately my spare passenger side vent is cracked. It could be repaired as the crack is in a hidden area

Will

[This message has been edited by infinitewill (edited 02-13-2014).]

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johnt671
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Report this Post02-13-2014 11:26 AM Click Here to See the Profile for johnt671Send a Private Message to johnt671Edit/Delete MessageReply w/QuoteDirect Link to This Post
I think the only reason for the tabs is keep the vents from rattling. I put a pair on my 84 (the 85 open type) which had broken tabs on both sides. To stop the little bit of extra rattling I cut some vacuum hose to slide over the the pieces that the front part of the vent slides on and they fit nice and tight,even quieter then the old vents were with the tabs still on.
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2.5
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Report this Post02-13-2014 01:15 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
JB weld or 2 part epoxy glue.

[This message has been edited by 2.5 (edited 02-13-2014).]

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a_bartle
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Report this Post02-13-2014 02:44 PM Click Here to See the Profile for a_bartleSend a Private Message to a_bartleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Update: I took the vent into work where they have alum welders. They tried to weld a tab on, but couldn't get it to work. They said it seemed like the material is something like "pot metal", because they felt they "should have" been able to weld it....

I wondered if JB Weld or 2 part epoxy would work. Do you think that could "form" the tab itself, or use it as an adhesive to "glue" a tab on, maybe made of stainless steel (where I could have more surface to bond with on the backside)?

Perhaps I should just forget about it. The vent still has one tab (the one closer to the back of the car) and I guess it would still hold it in place?
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2.5
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Report this Post02-13-2014 02:51 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by a_bartle:

Update: I took the vent into work where they have alum welders. They tried to weld a tab on, but couldn't get it to work. They said it seemed like the material is something like "pot metal", because they felt they "should have" been able to weld it....

I wondered if JB Weld or 2 part epoxy would work. Do you think that could "form" the tab itself, or use it as an adhesive to "glue" a tab on, maybe made of stainless steel (where I could have more surface to bond with on the backside)?

Perhaps I should just forget about it. The vent still has one tab (the one closer to the back of the car) and I guess it would still hold it in place?


I would use JB or epoxy to glue it back on, it might be tricky because they both are a thick liquid before they cure, and youd have to set up the parts the way you want them while it drys. I have used Loc Tite Marine Epoxy on a few things in the past with good results (I'm not sure if it would be the best for this specific metal). I even filled a small rust hole ona vehicle with it, after it dried I was able to sand it down and paint it.



I always thought the vents were some kind of pot metal.

[This message has been edited by 2.5 (edited 02-13-2014).]

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a_bartle
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Report this Post02-13-2014 03:10 PM Click Here to See the Profile for a_bartleSend a Private Message to a_bartleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Thanks for the tip, but I don't have the "tab" itself. I was wondering if I made some kind of "T" design out of SS and try to adhere it to the underside. Wondering if that would stay put, if the product would take the heat.

Maybe I better make the part (the tab) out of aluminum since the heating/cooling properties would be pretty much the same and have a higher likely hood of the bond lasting?

Do you think the epoxy would be better than something like JB Weld?

[This message has been edited by a_bartle (edited 02-13-2014).]

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2.5
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Report this Post02-13-2014 04:22 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
In your case having the part missing, I might just do the vacuum hose trick and forget it. Or find a junkyard vent.

JB weld would be firmer and take more heat, 500F.
They have a few different kinds
http://www.jbweld.com/produ...ications/automotive/

Maybe dont use the marine epoxy it says only for use under 150F, I'm not sure how hot the grille gets.
http://www.loctiteproducts....ite-Epoxy-Marine.htm

[This message has been edited by 2.5 (edited 02-13-2014).]

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