E70 35D mechanical water pump failure model

[bawareca]

Originally Posted by PHL08

51000 miles/5 years on my 2008 E70 when the pump failed. From what I read, this is/was a common problem in the X5.

Could you please specify what engine you have? There are 5 different engines installed in E70 (in the US) with at least 4 different type of water pumps and you say water pump is a common failure

[ZetaTre]

Originally Posted by JGard

Uhh, water pump failures are a pretty common failure item. I know in the Miata world (my secondary car) you need to get those water pumps replaced when you do the timing belt, so 75-100k miles. They will begin leaking somewhere around 100-110k quite often.

I'd also make sure you check valve clearance: I do it on my Ducati every 7K miles. But I guess that depends because in my generators is rarely needed.

I was also reading over on a Chevy board that people check the points when they do the water pump and the timing belt. I'd add that to the list to tell you SA.

[PHL08]

Originally Posted by bawareca

Could you please specify what engine you have? There are 5 different engines installed in E70 (in the US) with at least 4 different type of water pumps and you say water pump is a common failure

3.0si N52N

[pshovest]

Originally Posted by PHL08

3.0si N52N

That's an electric pump......this thread is specifically about mechanical pumps....those that are belt driven.

[captpilly]

How many folks have replaced their 35D mech water pump? I'm at 85k miles on my 2011 35D and about to change out the thermostat when it shows up in a week or so.

Looking to see if there were anymore thoughts on this

[Price]

I'd replace it just because you'll already be there draining coolant and all that, and the pump itself isn't that expensive. And you'll be good for another 5 years at least.

[JGard]

I'm thinking mine has failed now. I have 83,000 miles on the diesel and I've been noticing a persistent wet spot under the car for a couple of weeks now, and yesterday I received the low coolant warning.

I replaced my thermostat around 60k miles, as soon as I bought the car (which also resulted in needing to buy a new EGR cooler) and that's been fine, but no more. I haven't been able to actually get in there to look yet, but now I'm debating whether I want to deal with this project again or just bring it to the shop.

[captpilly]

Does anyone have directions on taking the water pump belt off for the 35D?

I read threads not specific to the 35D on removing the alt belt using the tensioner to reduce pressure on belt - same process?

[daytonatrbo]

Just to add a data point to this thread.

I replaced the original water pump on my xdrive35d at 121k miles. The water pump was not leaking, but the bearing was starting to develop a small amount of play.

I was replacing the thermostat due to need, and replaced the water pump for peace of mind. I'm glad I did.

I know that the water pump was original to the car because the gasket was still attached to the other gaskets on the front of the block. And I confirmed through the service history that no part of the cooling system had ever been touched on this vehicle.

[daytonatrbo]

Originally Posted by captpilly

Does anyone have directions on taking the water pump belt off for the 35D?

I read threads not specific to the 35D on removing the alt belt using the tensioner to reduce pressure on belt - same process?

Yes. They are the same belt. I used a 19mm spanner on the hex on the end of the idler. Rotate CCW and slip the belt off the tensioner pulley.