td5 egr bypass

You do know that de-catting is now an MOT fail and I wouldn't like to swear about an EGR block-off.

I really dont give a toss TBH!

For every rule they make, someone will find a way to get around it.

As for me Im sick and tired of being told what I can and cant do, Ive paid my taxes, abided by all I should have but still been tagged by such as VOSA and Customs even though I have never been found guilty of a thing.

Its time for me to do what I want to my own property, and until the various bodies and authorities tell me directly about such changes you are talking about, I will please my self.

So, my way of doing this will be, fit the decat, straight pipe and egr blank. When MOT time comes I'll take it in, if it fails I'll spend all of probably one hour fitting standard bits, get the MOT and on return home put my choice parts back on.

Any reason I cant do that Mr Officer?

Pete from BAS near York did mine + decat and centre box. Could feel the difference straight away, and now have over 110k on the clock with no issues; and no problems with the gasses once done, they leave from the place originally intended i.e. the exhaust!

For some reason my MOT soot readings dropped to around 0.75 from being just over 1.

Tom

18 stoner said:

Ok, Ive been running my 110 td5 for over 6 years now and finally going to do it. Not sure why I never went for it before, but now Ive got my head around how to, its on the cards.

I intend getting a decat and straight pipe too so hope I can find one supplier who'll do all three bits of kit. I rekon with that done she'll be a rocket in comparison.

I have a couple of Q's for you well knowledged boffs though. 1st, is it likely to give the transmission any extra greif? Its a 2002 with 90k on it but it had a hard towing life! Also, 2nd, what happens to the gas that will be blanked off, do I need to open a sump breather or summat?

Cheers, Pete.

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Pommy Pekkie said:

Pete from BAS near York did mine + decat and centre box. Could feel the difference straight away, and now have over 110k on the clock with no issues; and no problems with the gasses once done, they leave from the place originally intended i.e. the exhaust!

For some reason my MOT soot readings dropped to around 0.75 from being just over 1.

Tom

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EGR makes combustion LESS good, and less clean, and the inevitable result is more soot, and more CO2. No-one knows what "good" EGR's are supposed to do.

Pommy Pekkie said:

Pete from BAS near York did mine + decat and centre box. Could feel the difference straight away, and now have over 110k on the clock with no issues; and no problems with the gasses once done, they leave from the place originally intended i.e. the exhaust!

For some reason my MOT soot readings dropped to around 0.75 from being just over 1.

Tom

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Cheers for that Tom, the soot reading was one thing I was concerned about as at the last MOT the guy said it was acceptable but up a bit. If there's a chance it will go up that must be a bonus!

As for the gases, I thought the pipe that gets blocked was the sump pressure gas that on old engines was just laid at the side of the engine and aloowed to "breathe" into the atmosphere. I understood it to be "recycled" back into the inlet(via egr) to be burned rather than escape, therefore better for the armosphere. Could be wrong mind, but if im right, it wouldnt normally come in contact with any exhaust parts.

18 stoner said:

Cheers for that Tom, the soot reading was one thing I was concerned about as at the last MOT the guy said it was acceptable but up a bit. If there's a chance it will go up that must be a bonus!

As for the gases, I thought the pipe that gets blocked was the sump pressure gas that on old engines was just laid at the side of the engine and aloowed to "breathe" into the atmosphere. I understood it to be "recycled" back into the inlet(via egr) to be burned rather than escape, therefore better for the armosphere. Could be wrong mind, but if im right, it wouldnt normally come in contact with any exhaust parts.

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egr is the reburning of some exhaust gases to reduce nitrous oxides to meet emission regulations does increase soot ,reduce efficency ,amongst others like coking inlet

jamesmartin said:

egr is the reburning of some exhaust gases to reduce nitrous oxides to meet emission regulations does increase soot ,reduce efficency ,amongst others like coking inlet

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Gosh . . . we didn't know that, and in any event exhaust gases can not RE-BURN.

The whole point of EGR is to make the combustion process LESS hot, by polluting good fresh air (about 20% oxygen) with dirty exhaust fumes (about 0% oxygen), and that is what reduces efficiency.

There is only one "nitrous oxide" N2O, so it is a misnomer to say "nitrous oxides" in the plural.

The common oxides of nitrogen are
nitrous oxide N2O (as in laughing gas, aka Entonox anaesthetic gas)
nitric oxide NO
nitrogen di-oxide NO2

There are many others but they are unusual.

I bet JM knew that all along

18 stoner said:

Cheers for that Tom, the soot reading was one thing I was concerned about as at the last MOT the guy said it was acceptable but up a bit. If there's a chance it will go up that must be a bonus!

As for the gases, I thought the pipe that gets blocked was the sump pressure gas that on old engines was just laid at the side of the engine and aloowed to "breathe" into the atmosphere. I understood it to be "recycled" back into the inlet(via egr) to be burned rather than escape, therefore better for the armosphere. Could be wrong mind, but if im right, it wouldnt normally come in contact with any exhaust parts.

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You want the soot reading to go down. No EGR will help that to happen.

The little pipe you mention is the crank-case breather pipe, that in olden days allowed gases that passed the pistons to leave the engine completely, thus sending the water vapour, acids and so on outside as soon as possible.

It is not usual nowadays that these fumes are involved with the EGR, which is only a valve system to let gas from the exhaust manifold go back into the inlet manifold, and screw the whole process up.

In all modern engines, crankcase fumes are fed back into the engine, supposedly to be burned.
Crapola. Once again, they make regulations that cause engines to emit WORSE fumes than before, and that cause long-term damage to engines. It is called progress.

CharlesY said:

You want the soot reading to go down. No EGR will help that to happen.

The little pipe you mention is the crank-case breather pipe, that in olden days allowed gases that passed the pistons to leave the engine completely, thus sending the water vapour, acids and so on outside as soon as possible.

It is not usual nowadays that these fumes are involved with the EGR, which is only a valve system to let gas from the exhaust manifold go back into the inlet manifold, and screw the whole process up.

In all modern engines, crankcase fumes are fed back into the engine, supposedly to be burned.
Crapola. Once again, they make regulations that cause engines to emit WORSE fumes than before, and that cause long-term damage to engines. It is called progress.

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Cheers bud, thats just cleared it up for me.

I thought it was the sump gas that was being put back through the egr!

I'm gonna get some bits ordered!

Cheers Pete.

18 stoner said:

Cheers bud, thats just cleared it up for me.

I thought it was the sump gas that was being put back through the egr!

I'm gonna get some bits ordered!

Cheers Pete.

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No Problem.

You are quite right, the sump gas IS sent back into the engine, which has been a standard practice for 40 years or more. It doesn't do any good, and it does very little harm. Fine. Let's not worry about that.

EGR is something quite different. Rip it out, the whole damned thing.

Let's ask you to come back and let us know what happens to your car once the EGR is on the bench.

You won't be complaining.

Too right, Im gonna start browsing LRO now to see if I can find a shop that will sell an all in one package type thingy, decat straight pipe and egr removal unless anyone can suggest a good priced place?

Cheers all.

whats the bonus to removing it completely rather than just blanking it off? and whats the situation with MOT's i heard rumour that things have changed?

Blanking it off leaves the physical valve body restriction in the inlet air flow. You want maximum unimpeded airflow for best performance so removing it completely accomplishes that.

Remember the old school processes of porting and polishing inlet and outlet manifolds to maximise air and exhaust flow?

None of my engines have EGRs fitted and I've never yet had a problem with MOTs.