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Why you should not use regular rivets on mudflaps

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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scot850
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Why you should not use regular rivets on mudflaps

Post by scot850 »

Well work continues slowly on the 2000 V70 base. For every issue I fix I find at least one new one. I knew the RH turn signal unit was broken. Both front tabs were snapped off, and I believe I now know why. The light was only being held in place because is was jammed in place by the RH fender and the RH headlight.

I had already straightened the fender at the turn signal opening while the bumper is off, but couldn't figure why or how it had been bent. Today I was working on replacing the serpentine belt, and noticed that the RH front mud-flap appeared to have a bulge in it. I decided to remove the fender liner completely as I had managed to knock my favourite small screw driver down the hood hinge hole and it was stuck between the mud-flap/fender liner and the inner fender.

I had to drill the non-standard plain rivets out. The heads came off ok, and the liner came off. It was when I looked closer at the fender, the reason for the 'lump' became obvious.

Due to non-standard rivets being used (i.e. non-plastic coated) and the rivets having a shank that had several depressions/rings in it to grip tighter, the PO had (as is now obvious by other hidden damage covered by the new under-tray) presumably run at least the RH side of the car over possibly a kerb and or one of those concrete blocks to prevent you drawing too far forward in a parking bay. However, clearly the mud-flap had taken a hard hit, and un-like the plastic coated rivets the solid rivet held and bent the 3 upper rivets and the mud-flap outward which in turn had flared the whole RH fender at the rear outward, which bent the front inward and closed the gap up between the inner and outer fenders and breaking the turn signal cover tabs off.
Damage to mud-flap (1)
Damage to mud-flap (1)
Damage to mud-flap (2)
Damage to mud-flap (2)
I remember my wife doing the same with a previous P80 and the coated rivets just gave way or pulled through the mud-flap but it did not bend the fender, same with the last 850 project which had 3/4 mud-flap pulled off.

So, I know the un-coated cheap rivets are handy, but just don't go running you car over a kerb or stone on the side of the road!

The 2nd issue I had was it was nearly impossible to remove the old rivets as they do not collapse like the coated ones to allow removal from the fender. I had to carefully grind them down which took an hour, and all I then found was the paint around the rivets was cracked and flaking off.
Fender damage from plain rivets
Fender damage from plain rivets
So just a cautionary warning of not using the proper part!

Neil.

P.S. Now have to find a good replacement front RH mud-flap!
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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erikv11
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Post by erikv11 »

Those plastic Xmas tree fasteners I posted about work really well in this application ...
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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dyn blin
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Post by dyn blin »

Great post. Thanks you.

I see a preventative maintenance Satuday morning rivet swap in my near future.
'97 850 GLT Wagon- Driving to see 300k in the rearview

scot850
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Post by scot850 »

Erik did highlight an option for the rivets. My only worry is up here where we get a fair amount of snow, they may not be robust enough. It is a case of finding that middle ground or what you are comfortable with.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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skloon
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Post by skloon »

My only worry is up here where we get a fair amount of snow, they may not be robust enough. It is a case of finding that middle ground or what you are comfortable with.-

Yep they work well until you kick them to get the ice off- then they break, I have used regular ones with a big aluminum washer under

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erikv11
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Post by erikv11 »

skloon wrote: 28 Apr 2017, 11:35 My only worry is up here where we get a fair amount of snow, they may not be robust enough. It is a case of finding that middle ground or what you are comfortable with.-

Yep they work well until you kick them to get the ice off- then they break, I have used regular ones with a big aluminum washer under
The Xmas tree fasteners break? Hmmm interesting. I have from a few to several of them on basically all of my cars, near had one break. Maybe I'm not kicking hard enough!
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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theWIFES_S70
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Post by theWIFES_S70 »

You guys talking about fasteners like this?

Image

https://www.amazon.com/Disco-Automotive ... Assortment

or these?
Image
https://www.amazon.com/50-Pack-nylon-x- ... +fasteners

My liners are all over the place...
Retired:
1998 Volvo S70, N/A, 5-speed, 187K
2007 Volvo S40, 2.4i, 5-speed, 121K
2015 Volvo S60, T5, 85K

scot850
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Post by scot850 »

That is what Erik is talking about. This is what I am talking about:

https://www.fcpeuro.com/products/volvo- ... p-979878oe

There are other manufacturers out their that make plastic coated rivets. The Volvo ones are made in the UK according to the packaging.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

scot850
Posts: 14870
Joined: 5 April 2010
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
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Post by scot850 »

Amazon has these which are way cheaper than Volvo:

https://www.fcpeuro.com/products/volvo- ... p-979878oe

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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erikv11
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Post by erikv11 »

More like the first ones. But buy them on eBay not piecemeal, you can do it for pennies that way. See viewtopic.php?t=80744&start=20. I'll measure the size of the ones I have, they are a great size.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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