IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Starting the engine at -25C

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

User avatar
June
Posts: 1314
Joined: Wed May 04, 2016 11:18 am
Year and Model: 2004 S80 T6
Location: Jacksonville, Florida
Has thanked: 196 times
Been thanked: 94 times
United States of America
June

Re: Starting the engine at -25C

Post by June » Sun Jan 07, 2018 3:17 pm

oragex wrote:
Sun Jan 07, 2018 3:02 pm
Rattnalle wrote:
Sun Jan 07, 2018 11:19 am
Most people in Sweden who live where winter actually means winter buy the car with a engine heater installed from the factory.
Are these the coolant warming heaters? I've found a video on internet. However this device only seems to me it fastens up a little the coolant warming by heating faster the coolant once the engine fires up. The way it's installed in the middle of the hose, it doesn't seem like it will warm the entire coolant around the block unless the engine is running and the water pump is spinning ?

It would work like on a old car that blew a water pump belt. The hot water flows to the highest point pulling the cooler water behind it causing a flow. June


My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

User avatar
Rattnalle
Posts: 1363
Joined: Fri Sep 01, 2017 2:10 am
Year and Model: 2004 V70 2.5T
Location: Sweden
Has thanked: 14 times
Been thanked: 100 times
Sweden
Rattnalle

Re: Starting the engine at -25C

Post by Rattnalle » Sun Jan 07, 2018 3:40 pm

oragex wrote:
Sun Jan 07, 2018 3:02 pm
Rattnalle wrote:
Sun Jan 07, 2018 11:19 am
Most people in Sweden who live where winter actually means winter buy the car with a engine heater installed from the factory.
Are these the coolant warming heaters? I've found a video on internet. However this device only seems to me it fastens up a little the coolant warming by heating faster the coolant once the engine fires up. The way it's installed in the middle of the hose, it doesn't seem like it will warm the entire coolant around the block unless the engine is running and the water pump is spinning ?

The Volvo OEM heater for P2 and P80-models is like a clothes iron stuck onto the side of the oil pan - not very good although it does make the engine go hot a little earlier when you start driving.

There are lots of aftermarket heaters which are a heat coil in a piece of tubing that is inserted in the coolant loop. It's true that while they don't mechanically move the water around the heat itself will cause some movement and the heat will generally rise into the top of the engine. It doesn't get very hot since most are only 500 W or so but even lukewarm is an improvement over -20. The oil will often still be cold but when the oil hits the warm oil channels in the top it'll warm up quite quickly. The thermal mass of the top and the coolant together is much larger than that of the oil making it more effective than warming the oil which will get cold again when it hits the top.

Quite a few people also instead a battery charger and/or an electric cabin heater in parallel with these electric warmers. Calix who make the OEM heater in the video have a large range of accessories with compatible plugs.

The latest of these after market heaters combine stronger heating elements of up to 2000 W with a small pump.

Then there are the fuel operated heaters which often have a rated power of 3-4000 W. They also move the water around in some way else the power would just boil the water locally. With these you can in most circumstances have heat in the cabin and an engine halfway warm within 15-30 min depending on temperature.
These users thanked the author Rattnalle for the post:
oragex



Post Reply