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Name that rusty part

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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abscate
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Re: Name that rusty part

Post by abscate »

I think it was circular when Bjorn, with a small lip on it. That square thing on left was probably solid with a gap for something.

Im lost after that.
Empty Nester
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FireFox31
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Post by FireFox31 »

I had to mangle it to remove it, obscuring it's original shape. It's about as big as a quarter and was circular. No rust because I believe it's aluminum. It's easy to guess what it is, but exactly where was it installed?
FireFox31
Blue 2000 V70 NA manual, "the V70" - died, reborn, totaled, donated, stripped
Green 2000 V70 NA automatic, "the G70" - awaiting 2nd rehab
Black 2000 V70 NA automatic, "Geronimo" - rescued, rehabilitating
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abscate
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Post by abscate »

I’m still stumped. Sunroof, wheel bearing, brakes??
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Post by jreed »

The clues of "round, aluminum" make me think it could it have been an aluminum drain plug gasket installed on the engine oil or the transmission fluid sumps. Getting any warmer?
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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Post by scot850 »

I think you got it! If you squint and imagine hard you may see it................?! :roll: :lol:

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
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abscate
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Post by abscate »

Clip holding on transmission oil lines?

I like the drain gasket answer but having trouble seeing how that could get mangled like that.
Empty Nester
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abscate
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Post by abscate »

Here’s my entry for Sunday

😎
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IMG_4930.png (1.51 MiB) Viewed 869 times
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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Post by jreed »

A rear bumper bracket and bracket bolt?
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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Post by scot850 »

+1

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
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FireFox31
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Post by FireFox31 »

jreed wrote: 27 May 2023, 06:37 The clues of "round, aluminum" make me think it could it have been an aluminum drain plug gasket installed on the engine oil or the transmission fluid sumps.
You're right, it's the engine oil drain plug gasket. 50 more MVS points to jreed. You're quite good at this.

The drain plug was installed to such a high torque that the gasket was almost conical. It's likely that no previous technician changed the gasket so it leaked, thus they overly tightened it to stop the leak. You can still see the conical impression in the upper part of the "after removal" picture, but hopefully see it clearly in the "before removal" picture below.

The gasket diameter was also deformed so much that it would not fit over the plug threads. To remove it, I had to fight to get a tiny grip, then stretch it to get a better grip, repeat until I could fatigue the metal enough to break it.
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Deformed engine oil drain plug gasket
Deformed engine oil drain plug gasket
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FireFox31
Blue 2000 V70 NA manual, "the V70" - died, reborn, totaled, donated, stripped
Green 2000 V70 NA automatic, "the G70" - awaiting 2nd rehab
Black 2000 V70 NA automatic, "Geronimo" - rescued, rehabilitating
Blue 1998 V70 T5 manual, "the T5M" - awaiting rehab

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