Departure angle, exhaust pipe damage

[micknwen]

Hi all,

I have a 4.2L turbo diesel GU Patrol (2004), Recently got an ARB rear bar put on it. Now my exhaust pipe is the lowest thing at the rear. I don't mind scraping the tow bar if I reach the limit of my departure angle but I don't want the weight of the car to come down on the end of my exhaust.
Also, the exhaust blows a bit of black smoke and it accumulates black deposit on the rear bar above the end of the exhaust. I took it to an exhaust bloke who can angle the exhaust tip down a bit which will solve that problem but it won't help my departure angle. Shortening the exhaust will help my departure angle but will still have black smoke deposit building up on the rear bar.
Anyone else had to deal with this?

Cheers,

Mick n Wen

[threedogs]

You may need to modify the tail pipe into a dump style Stick a
fence paling behind your rear wheel and see how your departure angle is affected if at all.??
Cut exhaust and buy a chrome dump tip to suit

[MudRunnerTD]

Here are a couple of pics of mine. 3" pipe, GUIV, Kaymar bar

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Sent from my iPhone using Motorculture mobile app

[BigRAWesty]

Get it bent down to face the ground just behind the diff..

[happygu]

Here are a couple of pics of mine. 3" pipe, GUIV, Kaymar bar

329133291432915


Sent from my iPhone using Motorculture mobile app

and it has never seen the bush by the look of it .. :hpfredgeorge1:

[janderson]

I've just had a 3" exhaust fitted. The end drupes down. It dose not go pass the rear bar, It stop just pass the vehicle and sits behind the rear bar. It has also just been fully engineered with it this way. so must be legal.

[BillsGU]

I have had mine altered and have had a 90 degree angle put on the end. This stops the pipe from damage on drop offs and also stops soot blowing on the caravan and the large mud flaps I use when towing. The pipe sits parallel to the mud flap.

[threedogs]

Could even get the disc grinder out and cut the bottom off on an angle

[MudRunnerTD]

Could even get the disc grinder out and cut the bottom off on an angle

Yes but then when using an Exhaust Jack it's a Bitch!!!!

[threedogs]

Point taken maybe better off buying a dump tip and cutting the exhaust back a bit so dump is inside departure line.
Easy enough to do if that suits your requirements.
What area are you in Mick??

[Squalo]

I have some experience with this... I destroyed the factory rear exhaust by digging it in when reversing in a particularly challenging Glasshouse Mountains track, and bending it down so it touched the left rear tyre. The hacksaw came out and the rear resonator went into the back of the car, and later the wheelie bin. I left it like that for six months, with the exhaust basically coming over the rear diff and pointing down to terra firma, and I never had any soot build-up between it and the rear bar - or on the rear bar - at all. This surprised me, but later I realised why.

The next step was to fit the Scotts Rods 3" system that had been sitting in the garage for the afore-mentioned six months (I am very slow to get around to things, we'll touch on that again later). It was a fairly straightforward fitment, other than the fact that my driveway slopes and I spent a lot of time using my elbows and heels to arrest the slides on the garage creeper, so that I didn't roll out into passing traffic. At one point a 14mmm socket went rolling down the driveway so I lifted my feet and rolled after it, and caught it just before it went onto the road, and because the creeper is cheap and nasty the noise it makes when it gets rolling completely masked the sound of the 4 tonne Hino that was barrelling down the street towards my driveway at the time... but we got away with that one.

Once the 3" system was on I looked at the tip coming out below the left rear bar-mounted tail light, had a flashback and realised that it was not long for this planet, and cut it off behind the bar with the hacksaw. Then went off for a weekend at The Springs 4x4 Park.

I was half an hour into the journey and realised my indicators had gone away... so I pulled up and started checking fuses. Bingo, blown fuse, replaced, off we go again. Well, maybe not - a mate travelling with me called me to the back of the car, where the left rear bar-mounted tail light was doing a passable impression of a Dali painting. Remember what I said about the force of the gases coming out from a turbo diesel... well, at this point I began to develop an appreciation of the forces involved. We got to The Springs two hours later than planned, because that's how long it took to get to an exhaust shop and have a dumper tip welded on.

But it doesn't end there... because I eventually dug that dumper tip in - yes, at Glasshouse Mountains - and bent it back to the left rear wheel. Luckily for me there was an old fence nearby - laying down, so clearly not in use - and we cut a star dropper out of it and used it to bend the tip back up to near the rear bar. That sort of brings us up to date... well, not quite. At Landcruiser Mountain Park the other week I noticed that the sound of the exhaust had changed, so I got under it for a look. Where it was bent just after the rear diff there is now a nice 5" tear in the pipe. So, I could get it welded up, but I won't - because in the garage is a full 2.5" Redback system waiting to go on. It's been there since a month after the Springs trip, which is - gee - a year ago this month. Remember what I said about being a bit slow to get around to things...

[threedogs]

Was a bit hard trying to show departure angle but cant remember it hitting when off road, Would prefer
it to dump . might get exhaust boys onto it this week. this is 3" system

Edit :: towbar may lessen the departure over std, in that case I'm ok but never heard it off road yet

[Gecko17]

One possible solution, that I have seen on buses, is to port the exhaust through the left rear side of the wheel carrier frame. The exhaust blasts out to the side, there is no clearance issues (although I haven't looked up on the inside) and as the exhaust is flush mounted, it can't catch on anything.

The only problems I can forsee would be water immersion and clearance underneath....

Thoughts?

[janderson]

This has also just been fully engineered with it this way. so must be legal.