De-cat Downpipe

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I picked up a decat today for £18 including gasket, so will let you know what happens.

My only concern with old exhausts is sheared bolts so wish me luck. :)
 
horse62 said:
You have to jack the body up to take the weight off the suspension then it just goes in without removing the cross member as the gap opens up and you can spin it round under the engine up into place. I spent an hour on my back trying to figure that one out? Then I thought to do a search on here and there was my answer :doh:

Then it took ten mins with a bottle jack and block of wood :D
Click to expand...

now you tell me:doh::doh::doh::doh:
 
Brian S said:
I picked up a decat today for £18 including gasket, so will let you know what happens.

My only concern with old exhausts is sheared bolts so wish me luck. :)
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You need to soak them bad boys in WD-40 at every chance you get and be brave !
 
I squirted my nuts every night for a week before the day and then gave the studs a good scrub with a little wire brush to get rid of the flaky rust.

A good-fitting socket and all fingers crossed and they came undone nicely.

Definately jack the chassis up, again this forum showed me the way ;), it makes getting the solid pipe in a doddle.
 
Brian S said:
I picked up a decat today for £18 including gasket, so will let you know what happens.

My only concern with old exhausts is sheared bolts so wish me luck. :)
Click to expand...


I used an impact socket on a long extension bar with a 2' breaker bar on the end of that for the manifold bolts, the impact socket has 6 flat sides so little chance of rounding the nuts off. The size if i remember right is 15mm.

Nice gentle pressure making double sure it was the right direction as being upside down can be confusing to me and they come undone nice and easy.

Dont forget the liberal application of WD40

Dont spend ages replacing the front mounting rubber like i did as its not used on the de-cat pipe ;)
 
Job done. Studs all came out from the manifold but none sheared so no problem. Used a 2' breaker to loosen them off.

Could not get the rubber mount off so cut it off and after a little head scratching the old pipe left front ways past the steering arms. Remember I only had a torch for light.

New one went on much easier so in all took about an hour.

It's been a while since driving it but it is an improvement. Got to remember its not my modern diesel skoda but it seems to be more natural to drive.

In other words I think it now drives more like a 300 tdi should drive. :)
 
Brian S said:
Job done. Studs all came out from the manifold but none sheared so no problem. Used a 2' breaker to loosen them off.

Could not get the rubber mount off so cut it off and after a little head scratching the old pipe left front ways past the steering arms. Remember I only had a torch for light.

New one went on much easier so in all took about an hour.

It's been a while since driving it but it is an improvement. Got to remember its not my modern diesel skoda but it seems to be more natural to drive.

In other words I think it now drives more like a 300 tdi should drive. :)
Click to expand...

nice one brian, your having more luck than stu is with his water pump
 
I junked the whole lot and got a mild steel straight through system with only a (small) tail silencer.

Sounds fruity and you get all the benefits. Fuel pump tweaked to make the most of the rapidly leaving gases! 200k+ and i still love it.
 
wickford90 said:
nice one brian, your having more luck than stu is with his water pump
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ermmmm, dont think its going to go away......... grinders commng out ta the weekend....

Good to hear you had no probs Brian, be interesting to see the results over the next few days. give you a chance to realy give it a gunning. Hope it works, I will be doing the de-Cat soon, better not have any probs with them dam studs
 
Brian S said:
Your welcome to come and do it on my drive. I have a high lift jack and tools and can show you how it's best done. :)
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Thank you Brian , I may take you up on helping to fit the de-cat, I know how much ribbing i'll get if i snap a stud....... from you lot, one stiff screw and it gets me a whole load of micky take:p:p:p

Got to get the water pump done before the 14th as it Bures...:D:D:D:D


Guy when you thinking of doing your diff gasket?

Has anyone found out if its worth taking the Cat down the scraper, once removed.
 
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Allen 666 said:
I'm curios how do you get on at MOT time without the cat on will it still pass the emission test as i say only curios as i was thinking of fitting one.
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Fair point however, by the time they are this old they are not doing their job properly anyway, probably haven't for years - so it's not going to have any negative consequences come MOT time AND they don't measure the pollutants, just the smoke denisty. Look at it this way, not all 300tdi's have cat's anyway, and they don't get tested any differently and still pass.
 
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