I'm going to do my thermostat and coolant temp sensor on my 1995 850 turbo wagon soon.

Trying to figure out which one to get.

FCP has a few

Volvo Thermostat 90 Degrees - Genuine Volvo 271664OE | FCP Euro

Volvo Thermostat (Wahler) 87 Degrees 271417 | FCP Euro

They also have another Wahler for 90 degrees

Then there is Rock Auto.
More Information for MOTORAD 7234192

coming in at a whopping 6 dollars and some cents. Prices I found range from $5 bucks to $35, I know I know. OE equipment is always the right choice, but I'm poor man with a Volvo, gimme a break :P

Whats what?

 

If you're a poor man you chose unwisely. These are not know for their ease or economy of repair. That said IMHO just go to a local parts store and ask for a thermostat. Your choice with be a cheap 1 year or a more expensive lifetime. I'd go for the better one.
Same with the temp sensor unless it's a lot cheaper on rockauto and you don't think you'll need a warranty.

It not 87 degrees. It's 87 degrees Centigrade. On this forum we speak Fahrenheit and there is a temperature difference between a turbo and non-turbo thermostat. The turbo opens about 10 degrees sooner.

From the manual: (2) - Turbo thermostat starts opening at 180 F (87 C).

 

I use the Wahler or Volvo only. It has the bleeder pin in it.

 

Hey Kfrog, assume you're kidding here so i'll cut you some slack. Never assume it's F or C; always specify which it is. This is a big world and most of it uses metric system exclusively.

And i never heard of turbo using diff thermostat; ipd doesn't think so either:
Thermostat 90°C 1993-2001 850 C70 S70 S60 S80 V70 XC70 / 2001-200
look at Vehicle Fitment Guide..

 

No slack needed, it's not ego or pride either. From what I see in all the posts I look at "we" speak Fahrenheit and measure in inches and feet.
I'm on Volvo-Forums also and I know on there it's metric as a first language

I would much prefer if the US had stuck with the changeover they started in the early seventies. I remember all the road signs with the confusing metric conversions but the US is way behind. There is still a mentality that the world will convert. Not going metric cost the US a lot of business as our stuff didn't "fit" the European community. Same as the big three auto makers here not making right hand drive vehicles and wondering why overseas sales sucked (back then).

I prefer metric but honestly almost everyone on this site uses United States Customary Units for measurements.
I have no problem with doing the math to convert and will sometimes post in both but IMHO it's nice if we're all on the same page.

The biggest reason to make an issue out of it isn't you, me, Rspi the OP or "John Smith" the lurker it's the guy who has no clue and isn't going to do any research and thinks it really is 87 degrees the thermostat opens at.

That last line I posted in my last post is a copy and paste from the Volvo service manual. The service manual says that the thermostat opens at 186 deg except for the turbo.

COOLING SYSTEM SPECIFICATIONS

COOLING SYSTEM SPECIFICATIONS
Model Specification Coolant Replacement Interval ……………………. (1) Coolant Capacity
850
Non-Turbo ………………………. 7.6 Qts. (7.2L) Turbo ………………………….. 7.4 Qts. (7.0L)
960 ……………………………… 10.5 Qts. (10L)
Thermostat Opens
Starts (2) …………………………. 186 F (90 C) Fully Open ………………………… 216 F (102 C)
(1) – Manufacturer does not require routine coolant replacement.
(2) – Turbo thermostat starts opening at 180 F (87 C).

IPD should know but it's easier to just stock one and I doubt it really makes a difference.
In the big world it's only 6 degrees and either thermostat will fit but the engineers did spec a 6 degree cooler thermostat for the turbo engine on the 95 850. The manual I'm quoting is for a 95.

 

... preaching to the choir; I prefer metric too..

OK, never noticed that; thanks for the education!

Yeah, what units you're using/assuming is actually pretty important. Think the guys at JPL learned that lesson? You remember this?
Mars Probe Lost Due to Simple Math Error - Los Angeles Times

Oh yeah, sorry to OP for the thread hijack! BTW: Therm is not a good place to go cheap; could cost you a lot more than price of OE therm in long run..

 

Yeah I guess all my time on the SOHC forums got me always thinking in metric. I figured its just what you do when you own a car or motorcycle in which almost everything is metric. Sorry for not specifying Centigrade or Fahrenheit I figured it was pretty obvious that a thermostat would not open at 87 or 90 degrees Fahrenheit, my bad. Never assume.

I'll be ordering up the 87 C Wahler.

PS. Kiss4afrog when I said I'm a poor man with a Volvo I'm just trying to elicit a thoughtful response that takes into account cost vs quality rather than just specifying ONLY USE GENUINE VOLVO right away. I get it. Some people own nice 850's and some parts MUST be genuine volvo, but some don't need to be. In my case, I own a salvage title 95 850 turbo that has a multitude of issues that I'm working on, I knew this when I bought it. Its just like at the bike shop, yes the more you spend the better it will be, but there reaches a point of diminishing return. You want to spend another 100 bucks to save 5 grams on your XTR pedals be my guest. I'll take the XT's that do the EXACT same thing and are 5 grams heavier for $100 less. That's all I'm getting at, sorry for the rant.

 

I also consider the resale value which most of these cars have NONE, except for certain models. My main decision maker is... how long do I plan on driving this car? If it's "till it drops" I get the best I can afford.

 

Does nobody else notice that two out of three of the conversions listed here are incorrect?

90 C is 194 F, not 186 F.
87 C is 189 F (rounded).

 

Sorry. I wasn't doing the math, just copied from the service manual.

 

LOL! Too funny; typos in the manual! That never happens...

 

Not to complicate things, but I'm pretty sure that 271664 is the thermostat for turbo and non-turbo.. across many years and models. That is going from memory, I'll double check the parts catalog at work.

 

87 C is 189 F (rounded).[/QUOTE]

Like things aren't bad enough in this thread, now this guy is going to start rounding.

And were you rounding up or down I'd like to know !!


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