Water cooled EGR

-Joe · 26th November 2012, 21:46

How come some diesel R75's have a water cooled EGR but not all? What are the real world advantages a water cooled EGR?

I wish to keep my EGR unit working for it contributes to a quicker warm up, and I mainly drive short journeys. I understand this means from time to time I will have to clean the inlet manifold etc.

James.uk · 26th November 2012, 22:32

Not sure I have ever seen a water cooled one? Got any pics?

Outside temp 45f today. (Raining at the time). From getting in my car, starting the engine, turning on my FBH (I have a remote) my heater started producing warm air when I got stopped at the 3rd set of traffic lights. Approx distance a mile, approx time taken 3 maybe 4 mins?

I don't think that's bad..

My ZX takes longer...
...

Jakg · 26th November 2012, 22:51

I'm fairly sure they are all water cooler

I also don't think the EGR helps warm the engine up - at very low temperatures (-10°C or lower iirc) it stays open the whole time to increase temps but in normal conditions and with normal opening it should actually reduce combustion temps.

peter1961 · 26th November 2012, 22:57

well mine is`nt water cooled, and never heard of any that are.

Jakg · 26th November 2012, 23:19

Quote:

Originally Posted by peter1961

well mine is`nt water cooled, and never heard of any that are.

I believe theres a water jacket at the engine end of the EGR (rather than the intercooler EGR valve end)

-Joe · 27th November 2012, 21:21

I have seen one on an MGZT auto in a scrapyard. Also parts are listed on the data CD. With R220D early ones had no water cooled EGR late & ZR all had one fitted.

Water cooled EGR makes re-circled gases much cooler and imparts heat to water system.

Why only some 75's have it?? Is it not good for all??

peter1961 · 29th November 2012, 15:07

Quote:

Originally Posted by Jakg

I believe theres a water jacket at the engine end of the EGR (rather than the intercooler EGR valve end)

well you learn something everyday, thanks jakg.

Frank Incensed · 29th November 2012, 15:44

Not so much that the EGR is cooled, rather that the EGR is used to warm the coolant up quicker after a cold start.

http://forums.mg-rover.org/showthread.php?t=468004

And on our own forum today

http://www.the75andztclub.co.uk/foru...d.php?t=130523

Thanks T16

HarryM1BYT · 29th November 2012, 15:49

Quote:

Originally Posted by James.uk

Not sure I have ever seen a water cooled one? Got any pics?

Outside temp 45f today. (Raining at the time). From getting in my car, starting the engine, turning on my FBH (I have a remote) my heater started producing warm air when I got stopped at the 3rd set of traffic lights. Approx distance a mile, approx time taken 3 maybe 4 mins?

I don't think that's bad..

My ZX takes longer...
...

Not sure, but I think the water cooling was limited to either the autos or the PPD production. It wasn't about cooling the EGR gases, but about heating the coolant water a bit quicker.

Jules · 11th December 2013, 23:41

It seems totally random from the 100's of M47's I've seen !!

Some low spec early models had the jacket fitted
On the other hand some higher spec cars early or late didn't have it fitted.

Total mystery

26th November 2012, 21:46	#1
-Joe Avid contributor Rover 75 Classic SE 1.8T Join Date: Dec 2008 Location: wink Posts: 135 Thanks: 0 Thanked 20 Times in 15 Posts	Water cooled EGR How come some diesel R75's have a water cooled EGR but not all? What are the real world advantages a water cooled EGR? I wish to keep my EGR unit working for it contributes to a quicker warm up, and I mainly drive short journeys. I understand this means from time to time I will have to clean the inlet manifold etc.

27th November 2012, 21:21	#6
-Joe Avid contributor Rover 75 Classic SE 1.8T Join Date: Dec 2008 Location: wink Posts: 135 Thanks: 0 Thanked 20 Times in 15 Posts	Egr I have seen one on an MGZT auto in a scrapyard. Also parts are listed on the data CD. With R220D early ones had no water cooled EGR late & ZR all had one fitted. Water cooled EGR makes re-circled gases much cooler and imparts heat to water system. Why only some 75's have it?? Is it not good for all??

29th November 2012, 15:44	#8
Frank Incensed Ex 75 Owner 75 Tourerless Join Date: Jul 2010 Location: Manchester Posts: 2,147 Thanks: 60 Thanked 156 Times in 93 Posts	It's the Other Way Round Not so much that the EGR is cooled, rather that the EGR is used to warm the coolant up quicker after a cold start. http://forums.mg-rover.org/showthread.php?t=468004 And on our own forum today http://www.the75andztclub.co.uk/foru...d.php?t=130523 Thanks T16 __________________ Beyoncé's Green Light Used More Rubber 355188 of 355194

11th December 2013, 23:41	#10
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	It seems totally random from the 100's of M47's I've seen !! Some low spec early models had the jacket fitted On the other hand some higher spec cars early or late didn't have it fitted. Total mystery __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

26th November 2012, 22:32	#2
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	Not sure I have ever seen a water cooled one? Got any pics? Outside temp 45f today. (Raining at the time). From getting in my car, starting the engine, turning on my FBH (I have a remote) my heater started producing warm air when I got stopped at the 3rd set of traffic lights. Approx distance a mile, approx time taken 3 maybe 4 mins? I don't think that's bad.. My ZX takes longer... ...

26th November 2012, 22:51	#3
Jakg This is my second home N/A Join Date: Feb 2010 Location: Suffolk Posts: 6,867 Thanks: 0 Thanked 397 Times in 302 Posts	I'm fairly sure they are all water cooler I also don't think the EGR helps warm the engine up - at very low temperatures (-10°C or lower iirc) it stays open the whole time to increase temps but in normal conditions and with normal opening it should actually reduce combustion temps.

26th November 2012, 22:57	#4
peter1961 Gets stuck in 99/V connie cdt moonstone green saloon. 94/L 214 cabriolet dark blue Join Date: Dec 2007 Location: nelson lancashire Posts: 809 Thanks: 3 Thanked 12 Times in 11 Posts	well mine is`nt water cooled, and never heard of any that are.