Thermostat repair and coolant flush on a Volvo 850 Part 1

Thermostat repair and coolant flush on a Volvo 850 Part 1

Car was not warming up at all. Cabin heat was minimal. The thermostat has stuck partially open. This part of the video highlights changing changing the therm…

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LJRossPhoto says:

Your comment made me laugh. Haha πŸ™‚

cocoli2012 says:

It is very useful video!!! I have a question for my 2003 Volvo XC90, a
mechanic replaced the thermostat housing (OE part) recently. But after
that, coolant started to loss, its level was dropped about 0.12″ after each
driving. He asked me to add UV dye in coolant as he could not seen any
external leakings. After about 100 miles driving, I checked engine &
transmission oil dipsticks, have not seen any UV track. Is there any ideas
for my problem. Thanks in advance,

wedginator says:

@WildBill1006 It was 3 degrees when I was working on the car. The very next
day was -15 with snow. Crazy stuff.

aquadan63 says:

@wedginator I have an 07′ S60 and it its not throwing out heat, if I change
out the thermostat, should I also do a flush? it’s got 85k mi.

wedginator says:

@ccipherscope nope, no need to warm up the car. Best to do this while the
car is cold.

RuskyaMafia says:

hey man that was a really useful video u made. i just got few questions. my
question is my s70 GLT (2.4L Turbo) going to be the same? do i need just 1
bottle of radiator flush fluid to flush the radiator? and where can i get
DI water?

Craig Miller says:

I think I just need to flush my radiator.. I just picked up a 94′ Volvo 850
Turbo and love it! But it’s over-using coolant and I’ve noticed a little
debris/dirt in the expansion tank… Thanks for your video, will be
flushing my radiator in the next few days! : )

MrJdub314 says:

Do your research! Volvos require G11 coolant. Hang up the prestone! The
correct coolant is blue. Pentafrost, it is phosphorus free. Brand DOES
matter!

wedginator says:

Prestone is fine for the non-turbo models.

roguediabetic says:

I have a 940 and need to change mine and I think mine’s a little easier but
your video is a great help anyway – thank you. One small difference to note
is that the OEM thermostat for the 940’s at least has a housing with a
little nipple that is supposed to be facing up when installed. The
thermostat for the 850 appears to lack this housing on top.

tonycstech says:

i was joking man πŸ™‚

disnukka79 says:

Wow this guy takes forever to get his words out

WildBill says:

Oh you must have been cold over these past few days. I know it hasn’t
stopped snowing up in my area for the past couple of days (Barrie) Stay
warm bud

ccipherscope says:

thank you so much for that info. Is there any need to warm up the car first
before draining the Rad? thanks

wedginator says:

@RuskyaMafia Yes, just 1 bottle of flush fluid and fill the remainder with
DI water. DI water should be available at most automotive shops. Should
typically be located near the coolant section.

almrtnz1 says:

Good detailed video! I replaced my thermostat (and coolant temp sensor)
last week. Finding and using this video beforehand would have alleviated a
lot of anxiety on my part. Just a suggestion: Fuel line does not need to be
released. I was able to fit a T45 with an extension on the rear bolt of
thermostat (under fuel rail). Yes, I was at an angle, but it did work.
Also, ots better to just release the lower radiator hose versus that drain
cock, as it tends to break easily (plastic).

wedginator says:

No. Shouldn’t be doing that anyway.

farerse says:

are you sponsored by prestone ??

jcklush says:

Thanks, very helpful. Just ordered thermostat to do mine.

wedginator says:

@ccipherscope nope, no need to warm up the car. Best to do this while the
car is cold.

Buick Mackane says:

Is deionized water the same as distilled water?

wedginator says:

lol. all cool bud.

wedginator says:

Nope. Wish I was though.

wedginator says:

@disnukka79 Yea, sorry i tend to be like that. I’m an engineer and I have
to explain things down to the very small details. I try not to do that in
my videos but i tend to get carried away.

Johan Juhlin says:

you should do more videos of this kind with this great and classic car!
great filmed and very inspiring – you have a great voice to listan to as
well

Donovan Williams says:

Did you use a torque wrench to free up te thermostst nuts? Could you please
do a video on the correct jacking points and points where to put your jack
stands on a Volvo 850. The haynes manual doesnt indicate which positions
are safe for jack stands.

tonycstech says:

do you flush all your oils and coolant down the toilet like the rest of us ?

Tony Carr says:

thanks for your video it helped me greatly very easy to do now,

AKASIFAK says:

yeah…you started talking in summer and like you said at 0:37 ”it’s” now
”winter” !! haha

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