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Mikkeyb

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Location
North East UK
Car
Accord SE Exec 2.0i
hey guys,

i require your help yet again...

the M.O.T on my 2.0 Vtec SE Exec revealed there is an issue with the flexi pipe and the flanges between two sections in my exhaust i believe its the mid and back section... i have been quoted £100 for the work, cut off and weld in new flanges and same with the flexi pipe...

just wondering what i should do if im gonna spend that just for a fix would i be better off spending more and just replacing the sections to a better standard of exhaust?...

i am considering a new manifold and down pipe in stainless steel... very shiny... but i'll be honest i dont get all this cat back and what not...

so what should i do?...
 
That is a very reasonable quote and welding a new flexi section will be a hell of a lot cheaper than buying a new downpipe with a flexi attached.
 
As Neil has said that is a VERY good quote for the work fella.

There are a few manis available for the 6th gen (your engine code is F20B6).

Right, here goes with an explaination. The exhaust system is split into parts. You have

1 - The manifold
2 - The downpipe
3 - The flexi
4 - The first pipe
5 - The cat
6 - The second section
7 - The back boxes
8 - The tips.

This is the underside of my car

This first picture is of the downpipe that attaches to the flexi from the end of the manifold.
cimg0343a.jpg


In this one you can see the de-cat (where the cat should be - it's the part with the little spacer on it) then the section to the rear where it splits into two.

cimg0342.jpg


On the end of these you'll have the silencers, and on the end of those the tips.

cimg0346s.jpg


And this is all the bits together

cimg0339.jpg
 
A cat back system refers to the parts of the exhaust that are from the cat back to the tips on the end.

A full system usually means everything from the Mani to the tips at the rear of the car. When refering to the performance of the exhaust you need to take into consideration the diameter of the pipe to create a back pressure to aid the removal of the gasses and this in turn gives you a better running/performing car. IIRC then the correct diameter for the F series engines in 2.5 - the same as the H22.

Hope this helps a little. If you need anymore help, just ask fella.
 
Nice write up bud.
 
crespo said:
That is a very reasonable quote and welding a new flexi section will be a hell of a lot cheaper than buying a new downpipe with a flexi attached.
Click to expand...

gen. honda yes, but you can get the downpipe which includes the flexi for around £70 (pattern part)
 
john_d said:
gen. honda yes, but you can get the downpipe which includes the flexi for around £70 (pattern part)
Click to expand...


I believe Honda use stainless steel for there exhausts and a pattern part will be mild steel. If your original is stainless i would stick with that fella.
 
UPDATE!!!..

well thanks for the advice so far... i was getting annoyed with the blowing so i ended up paying £100 for the flexi pipe and the back flanges to be replaces.... blowing has stopped... WOOO... however a few issues... they also mentioned i have a crack and a hole on the top side of my back box which they have just pasted up... so that's not too bad...

since the exhaust has been repaired (a few days ago)... there has been an annoying rattle... took it back today they have removed the heat shields around the cat (they were loose apparently)... but they have also told me the CAT is FUBAR and needs replacing and my now rattle which is slightly less annoying is from the cat and the bits that have broken off...

replacement CAT from them fitted £165... EEEK!!!... (i hate cars)...

think i can get one from eBay for about £50ish and fit it myself...

BUT!!!...

would i get away with taking the CAT off emptying out the loose stuff?... i know it has a LAMBDA sensor on it and according to my exhaust place, emptying the ***** out the exhaust can set the sensor off and prompt the engine light on also sticking the car in LIMP mode...

so i need some advice... WHAT DO I DO>>?>> what if i replace the cat and damage the sensor?... what if they damage the sensor?... do i leave it?... do i empty the ***** out and hope for the best?...


HMMMMMMMMMMMMMMMMMMMM!!!....
 
Yes you can take the cat off and knock out the honeycomb stuff inside but you will fail your MOT when it comes round for emissions. On the plus side you will gain a few BHP.

I am not sure if it will trigger the lambda sensor to be honest. i doubt it as you can get de-cats that use the factory sensor. Could be wrong though. :unsure:
 
Mikkeyb said:
i was just gonna empty the loose stuff out if i could?... rather than the whole honeycomb?...
Click to expand...


Mate if you have gone that far you had just as well stick a £50 second hand cat on. Its probably not a job you will want to do twice.
 
Get a second hand cat mate. I bought one for £50 for my MOT and it sailed through. Easy job to change over. Just be careful when removing the O2 sensor mate and you'll be fine.
 
hmmmmm, not sure what to do... i have been warned off second hand cats as you dont know the life its had...
 
Have you considered buying a new one on eBay if you're not happy with a used one? About £85 shipped from what I saw, which is only £30 odd difference from a used one. I was going to replace mine for the MOT then whack in a decat pipe afterwards as I'm building my own sport exhaust lol. Might be a pain to replace though, all the flanges and bolts on mine have rusted together into one big pipe of misery... That's why it's all going!!

Josh
 
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