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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 3549 Location: Chicago
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Posted: Mon Jan 18, 2021 9:29 am Post subject: Exhaust Heatshield loose Rivnuts |
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I have 1 single Rivnut that's still holding into the body on my 1.9 Heatshield, allowing it to be tightened. The others are rusted to the bolts and just spin. Sooo, now with my all new motor mounts, I get the heatshield rattling on start up until the metal and exhaust warm up enough ,and the rattle stops....
I did a search for this issue, but didn't find any repairs listed.
If I remove the Cat and Muffler again, I figure I can:
[1] option-Spot weld with my MIG, a single bead of weld on the Rivnut, hoping it locks to the body, allowing the rusted bolt to be removed, without breaking the weld.
[2] Option, cut all the damn seized, spinning Riv-Nuts nut and install larger Rivnuts or at least new ones. Adjust size of slots in Heatshield if needed for new, larger bolts
[3] option I haven't heard of , or thought of...thoughts from Samba??? _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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MarkWard Samba Member
Joined: February 09, 2005 Posts: 17014 Location: Retired South Florida
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Posted: Mon Jan 18, 2021 9:51 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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Many of the heat shield bolt holes are slots. I think the design was that it could be removed and installed without completely removing the bolts. So, you might be able to work the shield out of the way.
For a fix, rivnuts have their place, but if you want something more permanent, get some 6mm flange nuts. You can remove the rivnut and open the hole some to accept the 6mm flange nut. Then take your welder and weld the flange to the rear valance. Some paint to prevent rusting and they should out last the shield. _________________ ☮️ |
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skills@eurocarsplus Samba Peckerhead
Joined: January 01, 2007 Posts: 16803 Location: sticksville, ct.
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Posted: Mon Jan 18, 2021 10:23 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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i just went thru this on my 84 while pulling the engine.
on the rear valance you can just barely see the stupid things. if you have needle nose vice grips you may be able to stop them from spinning to remove the bolt then just drill the bastards out
volkswagen does it...again
Link
_________________
gprudenciop wrote: |
my reason for switching to subaru is my german car was turning chinese so i said fuck it and went japanese....... |
Jake Raby wrote: |
Thanks for the correction. I used to be a nice guy, then I ruined it by exposing myself to the public. |
Brian wrote: |
Also the fact that people are agreeing with Skills, it's a turn of events for samba history |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50261
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Posted: Mon Jan 18, 2021 10:58 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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Grind the bolt heads off and then just push them up out of the way and install new ones. |
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 3549 Location: Chicago
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Posted: Mon Jan 18, 2021 11:44 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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MarkWard wrote: |
Many of the heat shield bolt holes are slots. I think the design was that it could be removed and installed without completely removing the bolts. So, you might be able to work the shield out of the way.
For a fix, rivnuts have their place, but if you want something more permanent, get some 6mm flange nuts. You can remove the rivnut and open the hole some to accept the 6mm flange nut. Then take your welder and weld the flange to the rear valance. Some paint to prevent rusting and they should out last the shield. |
My bad Mark, I should have added that the seized ones are already loose from the Heatshield, so it's fully removeable. That's how I was able to do my motor mounts in the first place, only 1 bolt was really holding the shield onto the body at one end. It looks like someone got several of them down, but not fully removed, and THEN the Rivnuts probably hung up on the rust at the ends of the bolts, breaking the crimped grip on the sheetmetal. _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 3549 Location: Chicago
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Posted: Mon Jan 18, 2021 11:44 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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skills@eurocarsplus wrote: |
i just went thru this on my 84 while pulling the engine.
on the rear valance you can just barely see the stupid things. if you have needle nose vice grips you may be able to stop them from spinning to remove the bolt then just drill the bastards out
volkswagen does it...again
Link
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See my notes to Mark above, shield is removeable, so I have options, I like Wildthings' idea too... _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 3549 Location: Chicago
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Posted: Mon Jan 18, 2021 11:45 am Post subject: Re: Exhaust Heatshield loose Rivnuts |
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Wildthings wrote: |
Grind the bolt heads off and then just push them up out of the way and install new ones. |
This is basically my option [2] that I laid out, and it's an attractive one since my shield is removeable and won't be in the way. Thanks again... _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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dabaron Samba Member
Joined: June 21, 2018 Posts: 2558 Location: Philly, mang
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Posted: Mon Jan 18, 2021 2:18 pm Post subject: Re: Exhaust Heatshield loose Rivnuts |
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i have a loose one and am ignoring. that is my solution. _________________ 1991 Vanagon GL Camper
i had no idea i wanted to be a mechanic
"burnin oil and cookin coils" -- Destructo
BiWerks Design, LLC |
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 3549 Location: Chicago
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Posted: Mon Jan 18, 2021 2:40 pm Post subject: Re: Exhaust Heatshield loose Rivnuts |
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dabaron wrote: |
i have a loose one and am ignoring. that is my solution. |
I wish I could, but dropping the heatshield down to service the mounts, and the reinstall, plus new cold engine rattle from the shield means it's glaring at me...
Not a hard job, plus all my exhaust hardware that needs to be removed is brand new with copper anti-seize and new copper nuts.
I 'could' cut flat washers into slotted shims, and hammer them under the loose /seized bolts......
But, the room needed to do that is basically remove the rear exhaust anyway, so might as well do it right the first time..... _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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