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Post by darren325 on Sept 23, 2007 8:47:49 GMT 11
hi all
please could someone give me some tips.
im inthe middle of trying to change my timing belt and tensioners, its a 3.1 diesel 1994 bighorn 4jg2 engine or is it 4gj2
ive taken my radiator out and the 2 fan belts and alternator belt off but im stuck trying to take off my pulley for the cam shaft.
its got a bolt head in the middle which is 24mm and 4 bolts going round it.
do i need to make a special tool or buy one to get the pulley off.
also when i took my radiator off there were 2 small pipes at the bottom with oil in, is this correct? when i put thathem back in are the oil and water pipes easy to bleed???
any info on this job would be gratefully received.
many thanx
darren
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quack
Isuzu Senior
Posts: 220
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Post by quack on Sept 23, 2007 9:27:58 GMT 11
the oil in the radiator will be for the auto, not sure bout the auto bleeding but with radiator i just filled it back up and run it for 10min and toping up when neccisery and then check it after you go for your next drive.
i think i remember reading an old post saying that you undo the 4 bolts around it and tap it off and the other 24mm bolt is for the cam belt pully, i would wait for some1 else to confirm this tho i might be wrong
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Post by geeves on Sept 23, 2007 16:16:10 GMT 11
Dont undo the big bolts They are very hard to retorque in place to 180 foot pound. The pulley should slide over the big bolt without too much fuss but a gear puller might help.
On the clubisuzu website under repairs and mods is a pdf for changing the belt on the 4jb1. Yours is virtualy the same.
One thing that bothers me is that only the crank pulley is outside the timing cover. Is this the one you mean or have you already got the timing cover off.
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ken
Isuzu Junior
Posts: 87
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Post by ken on Sept 23, 2007 20:29:46 GMT 11
Those pulleys can be dreadfull to get off. They seem to rust on. Mine took 3 days to get off. The first thing I would do is get a long steel bar and a heavy hammer. Loosen the 4 small bolts to catch the pulley if it drops off. Strike the inside of the pulley then turn the crankshaft 90degrees using the big nut and hit it again. Keep on doing this untill your knuckles start to bleed!!!! You should be able to do this from above. It would help to have someone to turn the shaft and hold the bar in place on the pulley. Do not hit the outside of the pulley as you may damage the grooves the belts run in. Also there is a rubber washer between the inside and outside (a damper) which deadens the blows. If this does not work I have another method you can use
so get back to me.
Ken
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beau
Isuzu Baby
green just doesn't cut it
Posts: 37
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Post by beau on Sept 27, 2007 16:17:07 GMT 11
dont smash at your pulleys with hammers and crowbars, they are machined at factory to balance your crankshaft properly..
go to supercheap and get a harmonic balancer for 20 odd dollars. they all work even the cheap and nasty ones. vary simple device really
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Post by darren325 on Sept 28, 2007 18:40:44 GMT 11
hi all
many thanx for the info
after a bit of persuading with a plastic mallet my pulley came off.
and the radiator bled ok with running the engine for a wee while with the cap off.
cheers chaps
darren
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