EGR mod question

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Treecol77

Treecol77

Member
Posts
22
Location
Dorset
Hi, I know there is a huge thread on this but haven't been able to find the answer. So sorry if it has been asked countless times, but here goes.
After looking at the blanking mod on eBay, there are lots of slightly different ones. Watching YouTube people seem to put different ones on to each other. So what is the difference between the ones with the fitting for the vacuum pipe on the EGR blanking kit, and those, like the one I ordered, that dont have this. There is a pipe sticking out from the mod but it's got no hole in it for the vacuum pipe. Hope that makes sense.
 
well I am interested in this as well, as the one with the small pipe blocker did not go well on my car. Perhaps different options do different things.
 
Treecol77 said:
Hi, I know there is a huge thread on this but haven't been able to find the answer. So sorry if it has been asked countless times, but here goes.
After looking at the blanking mod on eBay, there are lots of slightly different ones. Watching YouTube people seem to put different ones on to each other. So what is the difference between the ones with the fitting for the vacuum pipe on the EGR blanking kit, and those, like the one I ordered, that dont have this. There is a pipe sticking out from the mod but it's got no hole in it for the vacuum pipe. Hope that makes sense.
Click to expand...
I blanked mine a couple of months ago. i got the one without a hole, (stainless steel), all i did from research was to plug the top of the vacuum pipe. if i recall the one i bought came with a plug.
 
The best EGR bypass is this one.
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It has 2 stubs welded on to it. The large stub is to support the exhaust transfer pipe. This is important, as the exhaust transfer pipe will break if it's not supported.

The small stub blocks the vacuum pipe, and helps it look OE-ish.
 
Thats pretty similar to the one I have, because the vacuum pipe connects onto that small stub at a quick glance looks like a standard egr.
 
Alright so all these are aesthetical as they do the same thing.I believed there are different versions.
In my case, fitting the blank causes the car to smoke and lose power below including 3k rpm. No idea why...
 
Excellent, as usual on here, much appreciate your knowledge and help. Yes mine looks like the one in your photo. So now I get it that the little pipe with no hole simply blocks the hose when pushed on.
Just about to replace all the hoses for silicon ones too, so looking forward to the results all round.
 
I just cleaned mine out and plugged the vac hose. Did that about 6 years ago. No mot issues and no noticeable performance or smoke differences in all that time.
 
Treecol77 said:
Excellent, as usual on here, much appreciate your knowledge and help. Yes mine looks like the one in your photo. So now I get it that the little pipe with no hole simply blocks the hose when pushed on.
Just about to replace all the hoses for silicon ones too, so looking forward to the results all round.
Click to expand...

4mm silicone however make sure you get 8mm and 9mm clips for that.
 
I prefer to use the original EGR block the large exhaust with an alloy plug, and take out the inner job done, you then have an original EGR bypass. been doing these since 2011-2012. These are for our local meets only.

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Last edited:
Arctic2 said:
I prefer to use the original EGR block the large exhaust with an alloy plug, and take out the inner job done, you then have an original EGR bypass. been doing these since 2011-2012. These are for our local meets only.

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Click to expand...

That's a really neat idea. Improve air flow whilst fooling nosey MOT testers. My only concern with the basic bypass kits is if the tester knows the TD4, they know it's a modified EGR. I believe one can fail an MOT if a visual inspection confirms tampering with emissions reduction measures.
 
weemac said:
That's a really neat idea. Improve air flow whilst fooling nosey MOT testers. My only concern with the basic bypass kits is if the tester knows the TD4, they know it's a modified EGR. I believe one can fail an MOT if a visual inspection confirms tampering with emissions reduction measures.
Click to expand...
A stealth EGR mod is worthwhile, if the MOT tester knows the engine, and what a bypass looks like. Unfortunately this is the case with my MOT tester, so I had to swap the bypass for the original every MOT, not that it takes very long to do.
 
Nodge68 said:
A stealth EGR mod is worthwhile, if the MOT tester knows the engine, and what a bypass looks like. Unfortunately this is the case with my MOT tester, so I had to swap the bypass for the original every MOT, not that it takes very long to do.
Click to expand...

Indeed. Not a big job. Just another ritual required ahead of MOT.

I'm genuinely considering ripping the valve out (as per Arctic2's post), plugging the vac line with a few ball bearings and blanking the exhaust transfer pipe at the manifold end. That way it all still looks standard. Also might eliminate any potential back pressure caused by a blind pipe. It's how I did my van years ago and it works a treat. Never had to swap anything over at MOT and it's been round a few garages over the years.

Not sure I should be publishing that ;)
 
Just soaking the inlet manifold in Mr Muscle...what to I use to rinse that out manifold once it's all clean, petrol? Also, looks like I need all13 rubber gaskets on the manifold. May as well do them. Can't seem to find a supplier for the 5 that sit between the big square ones that the bolts go through. They're more like rubber washers. Are they main dealer only?
 
Treecol77 said:
Just soaking the inlet manifold in Mr Muscle...what to I use to rinse that out manifold once it's all clean, petrol? Also, looks like I need all13 rubber gaskets on the manifold. May as well do them. Can't seem to find a supplier for the 5 that sit between the big square ones that the bolts go through. They're more like rubber washers. Are they main dealer only?
Click to expand...

No need to use petrol. Best to chip and scrape away any of the larger chunks and build up to give the Mr Muscle a fighting chance of getting the inside back to plastic. I just ran a hose through it after each application and let it drip/air dry for as long as possible. Also, make sure you take the MAP sensor out before starting anything.

As for the seals, just buy a TD4 decoke set (LVQ101250LP or LVQ101250L). Gives you loads of stuff and is considerably cheaper than buy all the seals and gaskets individually. You might need something out of the pile at a later date ;)
 
weemac said:
That's a really neat idea. Improve air flow whilst fooling nosey MOT testers. My only concern with the basic bypass kits is if the tester knows the TD4, they know it's a modified EGR. I believe one can fail an MOT if a visual inspection confirms tampering with emissions reduction measures.
Click to expand...

Nodge68 said:
A stealth EGR mod is worthwhile, if the MOT tester knows the engine, and what a bypass looks like. Unfortunately this is the case with my MOT tester, so I had to swap the bypass for the original every MOT, not that it takes very long to do.
Click to expand...

It's a matter of choice but for information my Td4 has just passed its MOT for the 3rd year running with a bypass fitted. It's a "stealth" version but there are so many F1 Td4s in North Devon that it's impossible that the tester doesn't know what an EGR bypass looks like. He also commented that the emissions are "silly clean". My assumption is that either the bypass is considered passable or that testers have personal leeway.
 
weemac said:
Also, make sure you take the MAP sensor out before starting anything.
Click to expand...

Oops! :D Didn't realise that one. Should be interesting to see what happens when it's all back together with said sensor soaked in Mr Muscle.
Thanks for the tip on the decoke kit.
 
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