TD4 Diesel EGR Bypass Valve

Do these make any difference or are they a waste of money? Mine has already been remapped by a previous owner.

disconnect the little blue cotton covered pipe to the egr and plug the end of the pipe with something (like a 1" 8 woodscrew) then judge for yourself

motlymo said:

Do these make any difference or are they a waste of money? Mine has already been remapped by a previous owner.

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Well . . . .i personally think its a waste of time ,Optimus idea is the best and one that most do , the valve itself is an engineering folly , the idea being that waste ignited exhaust is hot and double burnt hence reducing emissions . . . .the truth is it gunks up your inlet manifold hence increasing pollutants and decreasing engine performance [just undo any valve or inlet manifold after 20k of motoring to see how much gunk is blocking the engine breathing]. . . .so to cut to the chase ,Optimus idea is the best. . . .

Hi, I suppose it'll be different for each car, but it made a big difference to mine. The week before I ordered mine I did the disconnect & plug the vacuum hose trick & it felt a little better on lighter throttle settings, but when I replaced the whole unit with a bypass the car feels much more lively & responsive. My car had done 54,000miles & the original egr was quite sooted up which probably explains the difference, but I definitely recommend one.

how much are they?

Hi,
£48 including postage from e-bay.

Regards

Paul

cheers mate

Will it effect the MOT

According to the seller of mine & other info I've come across including LRO magazine it won't affect the emissions in a bad way & should help them (cleaner combustion = less soot particulates which is what they measure at the MOT). It'll only take half an hour at the most to swap the old valve back on should you ever need or want to, so well worth doing.

Hi checked on ebay cant find anything on egr valves can you help
cheers David

Hi, The guy selling on ebay only lists one at a time, usually a search for "TD4 EGR" will bring it up. If not listed, keep trying as he will list his next one within 24 hours. His ebay username is wingy777 & he lists the same valve for Rover 75 & BMW 320d, but contact him & he'll sort you out. P.S. Well worth fitting.

chromiumuk said:

Hi, I suppose it'll be different for each car, but it made a big difference to mine. The week before I ordered mine I did the disconnect & plug the vacuum hose trick & it felt a little better on lighter throttle settings, but when I replaced the whole unit with a bypass the car feels much more lively & responsive. My car had done 54,000miles & the original egr was quite sooted up which probably explains the difference, but I definitely recommend one.

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A lot of us with the same engine in Rover 75s and ZTs fit these, with equally good results, especially if tuned (with a Synergy of course).

Ron

Hi, I have a L-series can anyone draw me a picture or take a picture of what must be done to block this off, or bypass it. Thanx

you say plug the pipe but which end do you take the pipe of off is it the end closes to the front of the engine which is conected to a round siler metai type thing sorry new to this and would like to try this thanks

At the front right of the engine (as you stand in front of the car) just under the right side of the air intake manifold thingy there is a round valve. It has a rubber hose that has a braid over it about 6-7mm in diameter running to it. Pull this hose off the EGR valve and block the hose with a screw/bolt etc and cable ty out the way.

Steve

hi steve thanks for that is the egr valve a metal type round thing lol sorry still green

ok found guy selling these but do they come with everythink to fit it and fitting instuctions only in picture on ebay looks like a bit of tube lol thanks

cremator said:

ok found guy selling these but do they come with everythink to fit it and fitting instuctions only in picture on ebay looks like a bit of tube lol thanks

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The bypass comes with instructions & you don't need anything else other than the bolt & cable tie to plug the vacuum hose which doesn't come with it.

Roverron said:

A lot of us with the same engine in Rover 75s and ZTs fit these, with equally good results, especially if tuned (with a Synergy of course).

Ron

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Yer dunt have to advertise on this forum Ron [we knows yer product is good]

ming said:

Yer dunt have to advertise on this forum Ron [we knows yer product is good]

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Yep, gotta agree with that.