Last post on Dec 20, 2011 at 8:53 AM
You are in the Isuzu Trooper
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Isuzu Ascender, Isuzu Trooper, SUV
Your Community Leader is paisan.
#2650 of 3299 Service Bulletin re: 1998 timing belts
Dec 17, 2003 (10:26 am)
Quote from 4x4Wire:
"Just saw this in an Isuzu Service Bulletin service (Alldata) that I subscribed to. Net is that 1998 timing belts don't need to be replaced until 100K (not 75K like the original service manual states). One less project for me to do this weekend!
Here's a copy of the service bulletin:
1998 Trooper (UX) / Rodeo (UE) / Amigo
In the past, the timing belt replacement for the above affected vehicles has been recommended at every 75,000 mile intervals, regardless of driving condition. It is now recommended that the timing belt replacement interval of the above 1998 Isuzu models follow the same timing belt replacement interval as its 1999 model year successor. The new recommended timing belt replacement interval is 100,000 miles for normal vehicle use, and 75,000 miles for vehicles driven under Severe Driving Conditions."
#2651 of 3299 thanks for the info
Dec 18, 2003 (8:36 pm)
We had the t-belt on our 98 replaced right around 75k. Would have been nice to wait until 100k, but either way I figure we will replace it only one more time in the vehicle's life, MAYBE two. Our 98 Troop is approaching 98k miles. I figure next t-belt replacement between 175-200k miles. After that, I don't think it will be worth fairly costly maintenance items on a 10 year old, 200k mile vehicle.
#2652 of 3299 Trooper starter troubles
Dec 27, 2003 (9:01 pm)
'95 Trooper with 148k miles. Starter rebuilt in October 2002. After approx. 4 months, starter would not turn over strongly. Back to shop, battery and alternator OK. Got progressively worse until it wouldn't turn over at all. Cycling the key on and off would get it (eventually) to turn over. Starter died again in December 2003. Back to shop where it was rebuilt again. Mech said the brushes were worn down to the nubs (especially on the hot side). Any ideas as to why it won't turn over strongly? (I've already tried different batteries). Thanks in advance.
Dec 27, 2003 (10:45 pm)
You're workflow is a little hard to follow? You had it replaced in 10/02 and then it wore out by 12/03? In the meantime you have switched batteries? It sounds like a poor installation of your starter? 7 years on your first and 1 on your second? Is it at the same shop again right now? I would be concerned that they aren't really rebuilding it...maybe back in '02 they just cleaned and lubed it and now it is finally dead? How well do you know the shop? I might consider another place?
Dec 28, 2003 (8:46 am)
Sorry. I trust the shop-it is an auto electrical shop where they remove the starter and rebuild it on-site. I have changed the battery with the same results. Is there someway to check and see if the starter is drawing too many amps and doesn't shut off after the engine is started. It seems like the brushes are continuously energized.
Dec 28, 2003 (11:23 am)
Three upfront points. (1)If they rebuilt it correctly it should now work correctly. Starters typically work for many, many years before failure. (2)Just because a shop has the facilities to do good work doesn't mean they do. (3) Even the best people make mistakes.
If indeed your shop is good take it back and have them diagnosis the problem. Given your 2 rebuilds they should do at least the diagnosis if not the correct repair for free.
If you want to DIY start with the basics. Are the battery connection tight and clean? What does an ampmeter show for current draw? Is the starter hot after the engine has been running for a while? Is the ignition switch causing working properly? Can you hear it running after startup? etc.
FWIW my take is the same as Sbcooke, namely they didn't do the proper rebuild the first time and now only fixing the brushes is too little too late.
#2656 of 3299 99 Trooper Transmission Programming
Dec 28, 2003 (3:58 pm)
Recently drove an '01 model for the first time and noticed the shift points and torque converter lockup points are different (better) than my '99. At about 42-44mph the converter on the '01 would lock, on my '99 you must be travelling at least 47-48mph. My minimum lockup rpm in (3rd or 4th gear) seems to be about 1700-1800 whereas the '01 would lock as low as 1300-1400rpm. Does anyone know if there is a computer mod that would make my '99 behave more like the '01? Thanks for any input... Would love to have mine behave more like the '01.
Dec 28, 2003 (4:25 pm)
Has to do with the tranny change in '00. In '00 they got the grade-logic tranny.
Dec 29, 2003 (2:16 pm)
Totally forgot about that transmission upgrade. I think that was the year for drive by wire too...
#2659 of 3299 Re:99 Trooper Transmission Programming
Jan 04, 2004 (3:20 am)
I have a 2001 5 speed manual transmission Trooper and it replaced a 1995 5 speed. The gear ratios are different (70MPH in 1995 was 3100RPM, but in 2001 70MPH is 2700RPM) in the manual as well.
My 2 cents on the gear ratio change: Isuzu's 3.5L engine is a stroked 3.2L therefore it has more torque and the possibility of more friction loss at higher engine speed due to longer stroke. So, Isuzu made the gear ratio change to make best use of that extra torque at lower RPM. The added benefits are a longer lasting engine and better MPG. I get an average of 1.5 MPG better with the 2001 even though it is a little heavier and the front hubs don't dissengage because of the shift on the fly button control.