Rover 75 Diesel Coolant change

[c-j2]

Originally Posted by COLVERT

Are you going to change the coolant or just try and remove some air from the system ??

To remove just air there's a bleed valve on the top of the heater hose, just to the left of the battery.

Top center of the pic.


PS. Also note the sponge to keep the hoses away from sharp edges.

Thanks for the reading useful postings - and photo.

Just to check, does the bleedscrew sit at that height/position during the bleed cycle?

Car currently a bit stripped, however it looks like it would be higher than the expansion tank. will coolant still flow from there during bleeding if so.

Prompt advice appreciated as hoping to resolve tonight!
Doubtless i'm missing something obvious here?

cheers
chris

[T-Cut]

Originally Posted by c-j2

Car currently a bit stripped, however it looks like it would be higher than the expansion tank. Will coolant still flow from there during bleeding if so.

To bleed any engine successfully, the coolent level in the expansion/header tank must be the highest point in the system. The 'header' tank is exactly that, it provides the hydraulic head to ensure all parts will flood on bleeding. Bleed screws are usually placed at a high spot in the hosework where air will accumulate. There's also an open bleed line from the head area which connects to the expansion tank at a level higher than the coolant. This allows air in the head/s to be replaced by coolant as you fill the system.

TC

[c-j2]

Originally Posted by T-Cut

To bleed any engine successfully, the coolent level in the expansion/header tank must be the highest point in the system. The 'header' tank is exactly that, it provides the hydraulic head to ensure all parts will flood on bleeding. Bleed screws are usually placed at a high spot in the hosework where air will accumulate. There's also an open bleed line from the head area which connects to the expansion tank at a level higher than the coolant. This allows air in the head/s to be replaced by coolant as you fill the system.

TC

Firstly, thanks for prompt response. As you say I was expecting the bleddscrew in the hose to sit lower then the tank.

however, the photo seems to show it strapped near the top of the battery box which is higher! - hence my confusion!

Should the bleed screw/hose in fact hang lower - somewhere nearer the height of the bottom of the battery box. then the expansion tank in its mounting position would be slightly higher.

my hose hangs loose so other than the photo on this thread i have no idea where it should sit.

any guidance appreciated. cheers.

[T-Cut]

The bleed hose wasn't tied up originally. Simple hydraulics dictate that the header level be the highest point. Providing your bleed screw sits lower than the coolant surface in the tank, it will bleed just fine.

TC

[c-j2]

Originally Posted by T-Cut

The bleed hose wasn't tied up originally.

aha. must not take pictures too literally!

many thanks for clarifying.

[ShaunB]

This is very useful I am just about to fit my dba and renew the coolant at the same time, what's the recommended coolant for the cdti

[Mike Noc]

Originally Posted by ShaunB

.....What's the recommended coolant for the cdti

It depends who you talk to.

[Arctic]

[

QUOTE=Mike Noc;2527315]It depends who you talk to.

[/QUOTE]

Red (pink) not white, maybe blue you wont go wrong with the 1st or the 3rd

[c-j2]

Originally Posted by T-Cut

The bleed hose wasn't tied up originally.
TC

Does anyone have a photo, or able to take a photo of where the long hose with the bleed screw should sit?

Or does the long hose just curl around and rest wherever it naturally sits. With mine that puts the bleed screw upside down - which took me ages to find.

sorry for the daft questions - new to ZT's so still finding my way around.
Thanks in advance
Chris

[c-j2]

Morning all,
Just found out that there is an inline stat fitted.

Is there anything in the bleeding or filling process that I need to do differently?

Only about 4litres of coolant came out dropping just the bottom hose.

Cheers