Exhaust Jacks

Submitted: Friday, Feb 10, 2017 at 19:53
ThreadID: 134278 Views:3203 Replies:9 FollowUps:5
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More years ago than I can remember, about 1990, I tried to use an exhaust jack
To lift my then vehicle. Hopeless.
I would appreciate advice from any current users as to their efficacy these days.
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Reply By: Sigmund - Friday, Feb 10, 2017 at 19:56

Friday, Feb 10, 2017 at 19:56
Very good.

They do benefit from a ply or rubber sheet disc on top for protection from sharps and maybe on the bottom as well.

Earlier ones worked best with three pairs of hands but current models are OK with one.
AnswerID: 608448

Reply By: Michael H9 - Friday, Feb 10, 2017 at 20:44

Friday, Feb 10, 2017 at 20:44
Mine's in the shed, I've used it twice and it worked but a bottle jack and plate is easier and takes up less space so I don't take it with me anymore.
AnswerID: 608450

Follow Up By: Member - Ross N (NSW) - Saturday, Feb 11, 2017 at 08:34

Saturday, Feb 11, 2017 at 08:34
I would still travel with 2 bottle jacks anyway but thought an exhaust jack might be better on surfaces where it is hard to find a base eg mud
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FollowupID: 878199

Follow Up By: Michael H9 - Saturday, Feb 11, 2017 at 10:49

Saturday, Feb 11, 2017 at 10:49
Mate, I tried using it in mud and it was like wrangling a jelly wrestler. :-)
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FollowupID: 878209

Reply By: Bob R4 - Friday, Feb 10, 2017 at 21:42

Friday, Feb 10, 2017 at 21:42
I had great success with mine back in the 70's.
It is important to arrange the top to be directly over the bottom to lift vertically.
If you want to move the vehicle out of a bog, arrange so the top is offset toward the direction you want to move, so when you pick the vehicle up, it falls over in the direction you want.
I managed to move a Mini Moke about 50 meters across a mud patch one day, and as we were cleaning up, a Land cruiser came along and needed the same cure.
I wouldn't go anywhere without it then.
Doesn't work well to change tyres, unless you use it to put the side of the vehicle onto a block or log or whatever to do the necessary, but was excellent to get under where the space is skinny.
The other move was to lift up the Moke if it was the back, and get the wife to shove something underneath to hold it.
Couldn't lift the front though.
Bob
AnswerID: 608452

Follow Up By: Member - Ross N (NSW) - Saturday, Feb 11, 2017 at 08:36

Saturday, Feb 11, 2017 at 08:36
Your point about the bottom being directly over the top was my original problem as the ground on which I was using it was not level and the jack kept falling over
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FollowupID: 878201

Reply By: Tim F3 - Friday, Feb 10, 2017 at 22:11

Friday, Feb 10, 2017 at 22:11
Mine works as intended just fine...specifically what is the problem with yours..??
AnswerID: 608453

Follow Up By: Member - Ross N (NSW) - Saturday, Feb 11, 2017 at 08:37

Saturday, Feb 11, 2017 at 08:37
See reply above
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FollowupID: 878202

Reply By: Sigmund - Saturday, Feb 11, 2017 at 08:58

Saturday, Feb 11, 2017 at 08:58
Yes, you do need to make sure it goes up straight. It might need a couple of shots.

The big plus is flexibility in locating it.
AnswerID: 608464

Reply By: TomH - Saturday, Feb 11, 2017 at 10:26

Saturday, Feb 11, 2017 at 10:26
They must work in some cases Have look at some episodes of " Highway to Hell" where they use large airbags to lift loaded B Double trailers up with them.
Definitely larger than the ones generally available, but certainly do the job
AnswerID: 608467

Reply By: duck - Saturday, Feb 11, 2017 at 12:52

Saturday, Feb 11, 2017 at 12:52
Ross
as a low pressure vessel manufacture I have made heaps of them & if you want a good one & one that works well you need to look at the Volume of the bag & how much psi it can take so you can work out the weight it can lift, remember the bigger the bag the less PSI needed & they work far better if they are hi volume low pressure

look at what & how they are made EG: pvc with be cheaper & lighter but will not last as long as one made of Hypalon material & check the gauge of the base cloth (EG, the higher the denier/desitex the stronger the fabric should be) & check the fittings & how they are fitted & work

my own bag has no problem lifting my Isuzu 4x4 motor home or a truck up to 8 ton of the ground with less than 1 psi
AnswerID: 608469

Reply By: Malcom M - Monday, Feb 13, 2017 at 09:22

Monday, Feb 13, 2017 at 09:22
If you have a turbo then its not a good idea.
The extra exhaust back pressure they cause can blow turbo seals...
AnswerID: 608507

Follow Up By: duck - Monday, Feb 13, 2017 at 12:05

Monday, Feb 13, 2017 at 12:05
if your fitting can't blow off at a very low pressure & it has a small filler pipe yes you may/could have a problem but if you have a large fill hose & your turbo can't handle it & its going to blow seals don't drive thru any water where your exhaust is under water because that back pressure is far far higher than a well made exhaust jack

the larger the bag the lower the pressure my 8ton bag will lift 8ton at 1psi (69millibar) the 50ton lifts 50tons & less than 0.25psi (17.25millibar)
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FollowupID: 878268

Reply By: D-MaxerWA - Tuesday, Feb 14, 2017 at 23:43

Tuesday, Feb 14, 2017 at 23:43
Russel Coight had fun with one on All Aussie Adventures

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