More on the EGR Bypass Valve....Modify or Leave alone - Page 34

klarzy · 29th October 2014, 21:06

Quote:

Originally Posted by RPWC

Can I use IPA to clean the egr? That's Isopropyl alcohol, not beer lol

i do not know if that will act as a petrolium solvent... i used parafin overnight and it worked quite nicely...

RPWC · 29th October 2014, 22:06

Quote:

Originally Posted by klarzy

i do not know if that will act as a petrolium solvent... i used parafin overnight and it worked quite nicely...

I don't have any paraffin left, but will petrol do the trick?

klarzy · 29th October 2014, 22:11

Quote:

Originally Posted by RPWC

I don't have any paraffin left, but will petrol do the trick?

Should do.
As I had a diesel I had no petrol around.

RPWC · 29th October 2014, 22:16

Quote:

Originally Posted by klarzy

Should do.
As I had a diesel I had no petrol around.

Petrol lawnmower.

first-things-first · 29th October 2014, 22:34

Quote:

Originally Posted by RPWC

Can I use IPA to clean the egr? That's Isopropyl alcohol, not beer lol

Used IPA on mine. Cleaned pretty well. Thinners seemed to do a slightly better job, maybe after IPA had been used first?

trikey · 29th October 2014, 22:51

WD40 works a treat for cleaning these out!!!

Arctic · 1st May 2015, 23:56

Carb cleaner and some wire wool works wonders

RodgerD · 3rd May 2015, 10:07

As far as I'm aware exhaust gases are introduced to improve emission and not primarily to cool the cylinder. Hot exhaust gases are going to modify the burn which could lead to lower combustion temperatures, but given that the EGR valve only opens at part throttle I cannot see removing it will affect the longevity of various components when they are designed to take the full force, temperature, pressure etc, when the engine is under full load and at high RPM.

wuzerk · 3rd May 2015, 14:06

Quote:

Originally Posted by RodgerD

As far as I'm aware exhaust gases are introduced to improve emission and not primarily to cool the cylinder. Hot exhaust gases are going to modify the burn which could lead to lower combustion temperatures, but given that the EGR valve only opens at part throttle I cannot see removing it will affect the longevity of various components when they are designed to take the full force, temperature, pressure etc, when the engine is under full load and at high RPM.

Agreed, the technical CD merely states that the exhaust gas recirculation is
provided to improve emissions, no mention of cooling anything.

Mike Noc · 3rd May 2015, 16:28

The idea is to use an inert gas to lower the amount of oxygen in the charge of air entering the cylinders. As the exhaust can provide it for free this is what they use.

It lowers the combustion temperatures and so reduces the amount of NOx produced.

Bit like an oxyacetylene torch: Light it on just the acetylene and it burns pretty cool. Start adding oxygen and the flame temperature increases.

29th October 2014, 22:51	#336
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,777 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	WD40 works a treat for cleaning these out!!! __________________ Lest we forget..

3rd May 2015, 10:07	#338
RodgerD Rodger & Out Rover 75 Saloon Join Date: Nov 2014 Location: London Posts: 712 Thanks: 10 Thanked 159 Times in 141 Posts	As far as I'm aware exhaust gases are introduced to improve emission and not primarily to cool the cylinder. Hot exhaust gases are going to modify the burn which could lead to lower combustion temperatures, but given that the EGR valve only opens at part throttle I cannot see removing it will affect the longevity of various components when they are designed to take the full force, temperature, pressure etc, when the engine is under full load and at high RPM.

3rd May 2015, 16:28	#340
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,552 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	The idea is to use an inert gas to lower the amount of oxygen in the charge of air entering the cylinders. As the exhaust can provide it for free this is what they use. It lowers the combustion temperatures and so reduces the amount of NOx produced. Bit like an oxyacetylene torch: Light it on just the acetylene and it burns pretty cool. Start adding oxygen and the flame temperature increases.