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2.5" Dump pipe for 4JB1T

Getting the best performance from your Isuzu
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geeves
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Joined: Mon May 11, 2009 1:56 am

Re: 2.5" Dump pipe for 4JB1T

Post by geeves »

I registered to have a look at items I have recently bought. They are a little cheaper than Hut city autoparts with currency conversion but not the freight. For the average ball joints etc the answer is local but for someone without a local autoparts store that can be bothered looking isuzu parts up ie Queensland it could be worthwhile
Will look that part up later
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geeves
Posts: 1980
Joined: Mon May 11, 2009 1:56 am

Re: 2.5" Dump pipe for 4JB1T

Post by geeves »

$77 plus $50 freight both US$ and thats not the one your looking for
I would be trying Motex or Wn Van and Ute as they may of had a vehicle with a blown engine
SamMu93
Posts: 119
Joined: Sun Apr 19, 2015 4:19 am

Re: 2.5" Dump pipe for 4JB1T

Post by SamMu93 »

geeves wrote:$77 plus $50 freight both US$ and thats not the one your looking for
I would be trying Motex or Wn Van and Ute as they may of had a vehicle with a blown engine

Seems like a good price if its new- Ive been informed that my second hand 4jg2 oil filter assembly is in the post so should turn up tomorrow or thursday :D
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geeves
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Joined: Mon May 11, 2009 1:56 am

Re: 2.5" Dump pipe for 4JB1T

Post by geeves »

new but non genuine. Might not be an issue.
MuZILLA
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Joined: Sun Oct 11, 2015 12:12 pm

Re: 2.5" Dump pipe for 4JB1T

Post by MuZILLA »

turnturn wrote:The QWS butterfly/shaft and bolts in the exhaust are about 25% of the area of the outlet. I removed them recently from my 4JB1.

What did you use to plug the holes on the downpipe?
turnturn
Posts: 162
Joined: Sat May 16, 2009 12:46 am

Re: 2.5" Dump pipe for 4JB1T

Post by turnturn »

I just machined up a plug that utilised the existing mounting threads. You can sort of see it in the top photo in my post above.
damo667
Posts: 88
Joined: Sat Jul 02, 2011 3:39 am

Re: 2.5" Dump pipe for 4JB1T

Post by damo667 »

I'm thinking of removing the QWS butterfly from my dump pipe, just wondering how much work is involved?

Failed a wof on my Flexible Joint, The rear section of my exhaust is already 2.5" so I'm going to get him to replace the rest with 2.5", up to the down pipe

I guess I'll have to unbolt the manifold from the block and maybe unbolt the turbo?

Then once I've got it out grind/unbolt/smash the butterfly valve out and fill the holes left behind?

Just wondering if anyone here has done it and has any advice or can see something I'm missing something out?

Cheers in advance

Damo
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geeves
Posts: 1980
Joined: Mon May 11, 2009 1:56 am

Re: 2.5" Dump pipe for 4JB1T

Post by geeves »

Some people have just undone the bolt removed the flap and put the bolt back but a cleaner way is to take it out and weld up the 2 holes
pig75
Posts: 141
Joined: Sat May 09, 2009 7:59 pm

Re: 2.5" Dump pipe for 4JB1T

Post by pig75 »

I Just used welsh plugs to fill the holes on my 4jb1
damo667
Posts: 88
Joined: Sat Jul 02, 2011 3:39 am

Re: 2.5" Dump pipe for 4JB1T

Post by damo667 »

Cheers guys, are welch plugs easy to use?
I dont know if my welding is up to the job. :oops:
I was originally thinking maybe I could tap in some bolts?
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