Exhaust Jacks,

I have had a TMJ exhaust jack for a couple of years best thing in sand for modular compact 4WD, 4 Tonne for a 2 tonne vehicle,the way to go. High lift jacks twist the body.

Exhaust jacks (aka Bull Bags) are great IF you've got no sharp self tapping screws or other sharp edges under the vehicle. That the vehicle is reasonably level, and that the exhaust system hasn't got heaps of leaks.
And it's one of those things to practice a few times at home- before 'needing' it out and about.

buy another shovel for the garden...the garden is too good for your 4by shovel

Geoff,
There's a well respected mechanic in my ex-4wd club who was recommending they not be used with Turbo-diesels. Something to do with backpressure, but unfortunately, I can't remember the details. Maybe someone else will know.

Cheers
phil

Hi there Geoff, my mate did have one for his patrol and now belongs to me, when he used it on his patrol (petrol 4.8L) couple years back he had problems on the way back to sydney with the engine management light coming on, took into dealer and it had a stuffed oxygen sensor, kept his mouth shut fixed under waranty then found out later that you cant use them on petrol motors as the exhaust gas cant get out and back up and stuff the sensor, now wether this is true or not or it was just a dicky sensor in the first place I'm not sure as reading above they have been useing on the xtrail so maybe a false statement but either way I ended up with his and it works a treat. Regards Steve M

Hi Geoff

Can only reccomend exhaust jacks here , used / have a couple of sorts.

Like anything they need to be used with care and understanding.

I have not seen/or experienced any issues with their use relating to turbo diesels or my current 4800 petrol patrol.

Its possible to envisage issues relating to excessive back pressure but these would be rare and probably in conjunction with other circumstances such as faulty air bag valve or just forgetting to disconnecting the thing when it job is done.

Excessive back pressure also occurs when exhaust is under water and have been there many times for long periods without that causing damage.

Biggest issue I see is ensuring that jack covers the slant so often sen these days on end of tailpipes.

Robin Miller

Hi Trendsetters,
I thought I'd remembered something from LCOOL regarding the 78/79 factory turbo diesel landcruisers such as Phil G's and mine relating to back pressure in the turbo and exhaust manifold.

Here it is, Turbo Back Pressure

It would appear my engine is capable of back pressuring itself including its turbo far more readily than an exhaust jack could.

So, what does this prove? Nothing beyond let the user beware!

Thanks for the input team,

Geoff.

Yeh I reackon that's the one I will be buying when the time comes

Doug

Geoff.
Mate an Air Jack would have been easier than doing it the way I did last Easter when one is alone

Site Link

Puff Puff Puff Puff

Doug

I bought and XJack, thinking handy for beach work.

First thing - if you have an exhaust pipe with an acute cut - rather than a square cut - make sure you get the adaptor - basically a piece of pipe that slides inside your exhaust but adds a square cut. Had to ring and ask for this - but arrived within a week free of charge - they actually have a little liftout inside with the warranty info. Very good service.

Have now used it - can't get the wheels off the ground. I have an OME suspension upgrade (which has provided a slight height lift) - and am thinking (as a I naive observer) that the vehicle is going up (which it clearly is) - but the travel on the suspension is keep the wheels on the ground? Is this likely? Still seems to be some weight on the tyres - so if this is the case - what do you suggest?

Alan