EGR Blocking or Cleaning?

[patty]

So iv been reading up on the EGR, how it gets dirty often and is not essential to the vehicle. however, as i understand it, it is only not essential in warm climates. in cold climates its suppose to assist in warming the engine on initial start up. So with the cold start problems im already faced with, should i really be adding another?

Iv already done the lead up to blocking the EGR (through mystery machines directions, that delicat re-posted, thank you) and now have the gasket to template the delete valve. iv gotten this far but do not see which part you take out to clean... or how to remove anything in there (its a big black mess). i may just delete it as its easier.

the main thing i still dont understand about the EGR is why are symptoms of a dirty one black smoke and loss of power? and of all things to stop it , you block it? wouldn't just letting all the crap build up do the same then? (not that im gona do that, i just want a better understanding)

thanks

[jessef]

block it

[patty]

earlier it was said not to use a pop can piece, would a couple layers of pop can aluminum work?

[delicat]

Hi Patty,

I don't think I'd use the pop can at all, it will never be like a thicker material. Just find some scrap metal the thickness of the gasket you'll be removing or a bit thicker and cut it to shape. Doesn't have to be exact shape, as long as it cover the entire egr valve. Just use the old gasket as a template for the blocking plate.

If you block it you don't need to remove ithe egr to install, just remove the 2 long horizontal bolts screwing into the egr, remove the gasket, insert the blocking plate instead and put the bolts back on, easy!

David

[patty]

and if it is the EGR that is causing the lack of power and black smoke, the delete valve should cure this?

[Jaz]

Hi Patty,

I bought a blanking plate from David who got it from Bruce (UK) for $10 when I thought I was still going to get a Deli soon... probably won't be for another year or so, so you are welcome to it for the same price if you want it?

J

[deligate]

blocking the egr

the (exhaust gas re circlulater) is used for re circlulating unused diesel from the combustion chamber (i think )
black smoke and lack of power are due to the extra diesel flooding the pump (i believe)
so i don't think that if you block it off you'll have any extra starting issues than the ones you already have
its an easy job as another member b4 said just undo bolts take out gasket replace with blanking plate and give it a go it'll only take 5 mins if no good replace gasket job done
could i suggest that you starting issues might be due to an incorrect tps position possibly they move with normal driving conditions check the aussie site www.delicaclub.com for directions on how to check and place
good luck and let me know how you go
mick and the delig8ter

[DelicaMark]

Patty I really wouldn't expect miracles from blanking your EGR valve. I blanked mine and it made no measurable difference in the problems I was having with black smoke or cold start issues. That is not to say it couldn't help but just don't expect the world from this modification. If your EGR valve is not stuck wide open then it likely will not make any difference in my opinion. My understanding of the EGR valve is that is normally closed and opens when the engine is not under load or is in an idle condition. So if you are getting smoke and other symptoms when you van is under load AND your EGR valve is working properly (ie not stuck open) then blanking it will not make much difference if any. I think the only way that blanking the EGR valve is going to make a big difference is if it is stuck open.

Saying allllll of that I still have mine blanked to avoid all of the crap that goes into the engine when it opens. I think that one of the guys had posted some recent pictures of what the intake looks like downstream of the EGR...pretty nasty looking. It also does not seem to be harming anything with having it blanked so giving it a try can't hurt. If you are going to try and clean it use some brake cleaner it worked great for me.

-Mark

[patty]

yeah, im hoping thats what the black smoke is due to. i had my timing checked injector pump rebuild just 9 or 10 months ago so i dont thunk its either of those. cant think of much else it would be. ill try it out, only thing im loosen is time, and i got tonz of that right now.

[EnviroImports.com]

OK, some information for you, the EGR = Exhaust Gas Recirculation valve
a small portion of the exhaust gas coming from the exhaust manifold gets routed through a valve the EGR that sends the gas that is VERY hot into the INTAKE MANIFOLD. so over time the exhaust soot will clog the valve OPEN so that you will have excess gas being sucked into your intake manifold, and into your combustion chamber, the valve is designed to only let in SOME exhaust gas for about the first 15* of the throttle pedal, so just on start up from a stop, and at idol, when your EGR valve gets old, say....... 15years old ....... there is ALOT of carbon build up and the valve starts to fail in the open position so your pumping loads of exhaust into your combustion making more black smoke. and robing power as HOT air doesent combust as well as Cold air.
your exhaust gas is so incredibly hot, using any thickeness of "pop cans" is like putting silk over it, it will just burn through and then with no valve on the other end your constantly pumping nasty badness into your engine, SO< IF you use a blanking plate then on the exhaust end, MAKE IT STEEL, about a 1/4" or thicker, with some either copper RTV sealant or a exhaust gasket, and on the INTAKE side, an ALUMINIUM Plate is prefered with NO copper , but still using a gasket, COPPER EATS ALUMINIUM, your intake manifold is aluminium.
but most importantly you have to CAP off the vacume lines to the EGR valve or your milage will go right into the potty.
For those who dont know what a blanking plate is; A blanking plate is a Plate the same size as the regular piece that is removed, but it does not have the hole in the center to let the gas or fluid through.
If a bunch of people want blanking plates , let me know I will make up a batch of them. some steel , some aluminium.
Noel

[patty]

now im confused!
in the instructions i followed, i only had to place one blanking plate, nothing done to vacuum lines or anything like that? what the deal?

[EnviroImports.com]

you can just put a blanking plate over the exhaust port, and leave the rest alone, but we just did this last weekend and did the full job, took the whole EGR valves off , caped the lines and freed up some room, but if you want to do it as quick as possible, you can just put a blanking plate on, and leave the rest in place. sort of the lazy way to do it, I like to have a clean engine bay, and I also prefer to drill and weld a bung to the EGR blanking plate, I use that as a place to mount the probe for a Pyrometer,
For me, If im going to take it off, then just take it off and get rid of it, free up some room, do the job properly and then you dont have to worry about it all later

Also if you take it off and put on a thick blanking plate you can see it, you dont have to wonder if you used to thin of material and it got burt through and is again sending exhaust into your intake...
taking all the now redundant parts off just frees up space, and took an entire 30-45 min of time, including time to cut& drill the egr plates,
Up to you....

[patty]

thanks noel,
if i had the space and the tools i would go all the way, and take it right out. but right now i have about a foot of snow around the deli and a oil/water puddle under the deli with only a couple of sockets. im takin the easy quick way out!
thanks again!

[patty]

for the guys who have used the blocking plate system. how the hell did you fit it in and get the screws across? i just spent a good 3 hours dropping F and C bombs like no other, and i got nothing to show for it. i need some locking vice grips i think. any one got a good technique?

thanks

[delicat]

Patty, PM me your ph.#, I'll call you and go over with you.

David