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Engine running temps very wide range, normal?

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

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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RickHaleParker
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Re: Engine running temps very wide range, normal?

Post by RickHaleParker » Thu Dec 26, 2019 2:28 pm

rguzz wrote:
Thu Dec 26, 2019 2:17 pm
Just replaced it with a Wahler, whose internals appear much more robust.
Some of the genuine Volvo thermostats are stamped Volvo on the bottom, Wahler on the top.

If the Wahler fails, next try a Stant or a Gates.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

rguzz
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Re: Engine running temps very wide range, normal?

Post by rguzz » Thu Dec 26, 2019 4:11 pm

Yeah, my failed t stat had Volvo on the bottom, but design was entirely different from the Wahler replacement. They could still make the Volvo ones, though. Thanks for advice. Problem solved!

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bmdubya1198
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Re: Engine running temps very wide range, normal?

Post by bmdubya1198 » Thu Dec 26, 2019 7:38 pm

Wow, interesting. You would think that the genuine Volvo part would be best, but I guess that isn't the case with the thermostat!
2000 V70R Venetian Red/Charcoal M56 Swapped 193k
2000 S70 GLT Mystic Silver/Taupe 2??k
2003 S60 2.4T Silver/Black 108k
2007 XC90 V8 AWD Sport Titanium Grey/Black 162k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 172k
1992 245 Base White/Beige 249k
Sold-
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

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befarrer
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Re: Engine running temps very wide range, normal?

Post by befarrer » Thu Dec 26, 2019 9:17 pm

Volvo probably buys from whoever makes the most financial sense at the time I bet. If one company cant fulfill the order, they go to the next.
98 V70 GLT AWD
01 Focus Wagon SOHC 5-speed
93 Mazda B2200 with 13B swap
Works on Volvo Trucks

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