what is this pump/pulley

reeflodge · **Joined:** Fri Apr 25, 2014 12:35 pm **Posts:** 101

This pump/pulley keep stopping and starting is it supposed to do this?
Its located top far left as you stand in front of the car looking at the engine.

What pump is it?

https://m.youtube.com/watch?v=7PDhpmYD6cI

2005 Jeep Liberty KJ. 2.8crd

jws84_02 · **Posted:** Sat Dec 24, 2016 2:22 pm

Viscous heater. Yes it's normal for it to kick off and on. I have my relay pulled to disable it

reeflodge · **Joined:** Fri Apr 25, 2014 12:35 pm **Posts:** 101

jws84_02 wrote:

Viscous heater. Yes it's normal for it to kick off and on. I have my relay pulled to disable it

What does it actually do?
And what are the benefits or disadvantages of pulling the relay?

jws84_02 · **Posted:** Sat Dec 24, 2016 2:54 pm

It heats up the coolant faster. If your in a milder climate there is absolutely no need for it. I'm from Illinois and don't really see a benefit from it on. It robs mileage

reeflodge · **Joined:** Fri Apr 25, 2014 12:35 pm **Posts:** 101

I think the climate in Illinois is similar to ours in England.

How do use disconnect it?

jws84_02 · **Posted:** Sat Dec 24, 2016 3:23 pm

Pull the relay in the fuse box

papaindigo · **Posted:** Sat Dec 24, 2016 3:26 pm

It has a silicone type fluid inside it and a couple of metal plates IIRC and is plumbed directly off the thermostat so coolant flows thru it to the cabin heater core. When you first crank up the viscous heater clutch engages causing the plates to rub together, producing heat by friction, that heat is transferred to silicone fluid and then to the coolant, thus increasing coolant temp to the cabin heater core a bit sooner than normal engine warm up. Once coolant temp reaches a certain level (ca. 135f IIRC) the viscous heater clutch disengages although it may cycle on/off a few times at the temp threshold.

When ambient temps are such you don't need cabin heat it's a total waste of energy; in mild climates ditto; might help a bit in really cold winter but if you can plug in block heater the viscous heater provides no benefit. Mine has had the relay unplugged for several years; will throw a code (B10B3) but will not set a CEL.

geordi · **Posted:** Sat Dec 24, 2016 3:30 pm

If it is cycling, when your engine is already indicating that you are up to temperature, your thermostat may have failed open. Your temperature gauge should reach vertical, if your thermostat is functioning properly. If you could be losing up to 3mpg because of the viscous heater running when it does not need to.

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Brownrecluse · **Posted:** Sat Dec 24, 2016 5:14 pm

geordi wrote:

If it is cycling, when your engine is already indicating that you are up to temperature, your thermostat may have failed open. Your temperature gauge should reach vertical, if your thermostat is functioning properly. If you could be losing up to 3mpg because of the viscous heater running when it does not need to.

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So is it's only purpose to provide heat to the cabin faster? Also my temp is 1 mark below the middle position while on the highway with a temp of about 40 degrees outside. Normal? Please say normal :SOMBRERO:

flash7210 · **Posted:** Sat Dec 24, 2016 5:24 pm

Yes, normal.

flash7210 · **Posted:** Sat Dec 24, 2016 5:30 pm

It you can live without your engine driven cooling fan, the viscous heater can be easily deleted.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85330

Brownrecluse · **Posted:** Sat Dec 24, 2016 6:20 pm

flash7210 wrote:

It you can live without your engine driven cooling fan, the viscous heater can be easily deleted.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85330

Thanks Flash. I want to keep my AC so I guess I can just unplug the relay. My commute to work is only 1 mile so it's not going to heat up anyway. Also the cord for my block heater had never been used and is dry rotted so I have not tried to use it. BTW I'm very grateful for this site.

TURBO-DIESEL-FREAK · **Joined:** Sat Apr 17, 2010 3:29 pm **Posts:** 1167

Even in really cold climates the viscous heater can be deleted if you install and use a Webasto heater.

NOTHING beats pre-warming the engine to 170 degrees before you even crank it to start. With a Webasto heater installed, all of those glow plug issues Liberty CRDs seem to have will simply be a non-issue.

flash7210 · **Posted:** Sat Dec 24, 2016 7:30 pm

Brownrecluse wrote:

flash7210 wrote:

It you can live without your engine driven cooling fan, the viscous heater can be easily deleted.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85330

Thanks Flash. I want to keep my AC so I guess I can just unplug the relay. My commute to work is only 1 mile so it's not going to heat up anyway. Also the cord for my block heater had never been used and is dry rotted so I have not tried to use it. BTW I'm very grateful for this site.

You can still keep your AC.
There should be an electric fan in the grill in front of the condensor. It will turn on whenever you turn the AC on.
However, if you ever plan to tow a heavy load through the mountains in July, you may want to keep the engine driven fan.

joelukex4 · **Joined:** Thu Sep 29, 2011 4:54 pm **Posts:** 386

Brownrecluse wrote:

flash7210 wrote:

It you can live without your engine driven cooling fan, the viscous heater can be easily deleted.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85330

Thanks Flash. I want to keep my AC so I guess I can just unplug the relay. My commute to work is only 1 mile so it's not going to heat up anyway. Also the cord for my block heater had never been used and is dry rotted so I have not tried to use it. BTW I'm very grateful for this site.

About the worst thing you can do for a diesel engine. Start it , drive 1 mile and shut it down. Never gets to operating temperature.

Brownrecluse · **Posted:** Sun Dec 25, 2016 8:29 pm

joelukex4 wrote:

Brownrecluse wrote:

flash7210 wrote:

It you can live without your engine driven cooling fan, the viscous heater can be easily deleted.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85330

Thanks Flash. I want to keep my AC so I guess I can just unplug the relay. My commute to work is only 1 mile so it's not going to heat up anyway. Also the cord for my block heater had never been used and is dry rotted so I have not tried to use it. BTW I'm very grateful for this site.

About the worst thing you can do for a diesel engine. Start it , drive 1 mile and shut it down. Never gets to operating temperature.

I know but thats my commute. I usually run errands at lunch or after work too.

dgeist · **Posted:** Mon Dec 26, 2016 10:43 pm

Brownrecluse wrote:

I know but thats my commute. I usually run errands at lunch or after work too.

It may be in your best interest to leave the viscous heater engaged, then. Your mileage MAY suffer, but not likely much more than not operating at proper temps. I feel you pain, though. Even in 90-degree weather, my engine temps never quite make it up to normal operating range due to my commute (<4 miles). The good thing is that since it's just a relay, you can easily reverse the change if you decide to try your experience with it disabled (like, less than 1 minute to change).

Dan

Brownrecluse · **Posted:** Mon Dec 26, 2016 11:39 pm

dgeist wrote:

Brownrecluse wrote:

I know but thats my commute. I usually run errands at lunch or after work too.

It may be in your best interest to leave the viscous heater engaged, then. Your mileage MAY suffer, but not likely much more than not operating at proper temps. I feel you pain, though. Even in 90-degree weather, my engine temps never quite make it up to normal operating range due to my commute (<4 miles). The good thing is that since it's just a relay, you can easily reverse the change if you decide to try your experience with it disabled (like, less than 1 minute to change).

Dan

I ll leave it hooked up for now. I only drive my personal vehicle about 5-10k miles a year. I travel a lot and drive company vehicles. I also got bigger fish to fry after installing my lift. Like whats that clunk on small bumps? new sway bar links and mounts going in tomorrow. Should I re gear because I can feel the power loss on those hills.. etc? lol

jws84_02 · **Posted:** Tue Dec 27, 2016 12:26 am

Just put a bigger tune on it. Lol :rockon:

Brownrecluse · **Posted:** Tue Dec 27, 2016 1:21 am

jws84_02 wrote:

Just put a bigger tune on it. Lol :rockon:

Let me get to the timing belt/ ARP studs first and an updated TC first lol

what is this pump/pulley

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