Isuzu Trooper Owners Club UK™

zarkrax · * Joined: 17 Mar 2010 Posts: 25

Hi all,

Trying to attempt this on an Bighorn Auto with A/C.

Noticed the bottom cover holding the bottom water pump bolts is behind the bottom belt pulley.

Reading previous posts it seems that the pulley should come off by undoing the four bolts leaving the centre bolt in place and a few clouts. Looking at the centre bolt head it doesn't look like it would "Pull through the pulley" if that makes sense, so I assume the bolt needs to be removed. Being on auto it means the engine isn't locked and the pulley would turn if I tried to get the bolt out.

Wonder if anyone had any tips or tricks to get the bottom pulley off?

Cheers

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Rhanagar · Posted: Mon Mar 26, 2012 23:49 Post subject:

Just undo the four little bolts (12mm socket). Then get your longest jimmy bar and stuff the end in the outer groove levering against the head of the old of water pump, you can then whack the pulley with a hammer and it will pop off. Ignore the centre bolt.

Better instructions here, just ignore references to timing belt change, though I would be tempted to do that as well.

http://www.itocuk.co.uk/forums/viewtopic.php?t=27458
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1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

zarkrax · * Joined: 17 Mar 2010 Posts: 25

Thanks for the reply.

Unfortunately on mine pulley it is a different arrangement.

Having had a closer look the Pulley is bolted on with big thick washer.

As its an Auto had to lock the flywheel to get the bolt out.
Then is was a sod to get the pulley out, the four bolts didn't actually screw into anything, so I used longer bolts to "push the pulley off" and it was tight to get off to the very end!

Not sure if having A/C has anything to with it.

Rhanagar · Posted: Wed Mar 28, 2012 13:21 Post subject:

Where are you mate? Sounds as if you might have a gear driven engine, or at least something very strange to the rest of us.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

zarkrax · * Joined: 17 Mar 2010 Posts: 25

In the UK mate its a Jap import.

I have taken some photos I will uplaod them later

zarkrax · * Joined: 17 Mar 2010 Posts: 25

Sorry also forgot to say it is belt driven, timing belt is under the water pump.

DYLAN · Posted: Wed Mar 28, 2012 15:38 Post subject:

I don't think gear driven exists does it? Just belt and some chain.
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2002 S-TYPE JAGUAR 3.0 SPORT

Rhanagar · Posted: Wed Mar 28, 2012 19:02 Post subject:

No no no Dylan ... before Grandad has a tantrum Very Happy

... there never ever was a chain driven 4JB1 or 4JG2. They were on the whole belt driven in vehicles, with some gear driven ones. Most gear driven one's ended up in dusty countries like Indonesia, and others used with pumps or marine purposes.

I think I rescued that one lol.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

DYLAN · Posted: Wed Mar 28, 2012 19:13 Post subject:

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2002 S-TYPE JAGUAR 3.0 SPORT

zarkrax · * Joined: 17 Mar 2010 Posts: 25

As promised the pictures:

Below is the bolt with the big washer on

Bolt and washer inside pulley

Just to prove it is belt driven

Rhanagar · Posted: Thu Mar 29, 2012 8:34 Post subject:

Oh yeah ... big ass washer. How bizzare, though I do recollect someone else having the same issue. One to remember for future reference.

Cheers for the pictures buddy. Will help others in the future.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

silvio · * Joined: 14 Jan 2012 Posts: 10 Location: Port Wine

silvio · * Joined: 14 Jan 2012 Posts: 10 Location: Port Wine

I apologize for my previous post!

As my 4x4 also has ac; When looking at the photo, I thought it was the crankshaft poly!

this:

I seen the middle bolt, removed ; I went into panic !
(I thought it was the crankshaft pulley bolt)

kenmac · * Joined: 03 May 2013 Posts: 23 Location: Didcot

Just a quick question. ....is the thread standard ie turn left to undo or is this a left hand thread?

ALFIE B · * Joined: 06 Aug 2013 Posts: 42 Location: Dumfrieshire

Standard right hand thread.....best way is to find a perfect fitting socket and using a long bar put the bar against the chassis rail and flick the starter..don't let the engine start just flick the key and it'll come loose a treat Wink

just changed my Cambelt and this is the way I removed the pulley.

Re-tighten to 150 lbs FT

Alfie
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Heart of Gold Nerves of Steel Knob of Butter