Last post on Dec 20, 2012 at 10:42 AM
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#72 of 383 Re: 2001 Trooper S with automatic transmission [aztrooper01s]
Nov 15, 2006 (9:38 am)
Thought this might help with the clunk explanation:
2001 Isuzu Truck Trooper LTD 4WD V6-3.5L
Vehicle Level Technical Service Bulletins All Technical Service Bulletins Drivetrain - Driveline 'Clunk' Explanation
Drivetrain - Driveline 'Clunk' Explanation
ISSUE DATE April, 2005
All Isuzu Vehicles.
Some owners of light duty trucks equipped with automatic transmissions may comment that the vehicle exhibits a clunk noise when shifting between Park and Drive, Park and Reverse, Drive and Reverse, or while driving when the accelerator is quickly depressed and then released.
Whenever there are two or more gears interacting with one another, there must be a certain amount of clearance between those gears in order for the gears to operate properly. This clearance or freeplay (also known as lash) can translate into a clunk noise whenever the gear is loaded and unloaded quickly, or whenever the direction of rotation is reversed. The more gears you have in a system, the more freeplay the total system will have.
The clunk noise that owners sometimes hear may be the result of a build-up of freeplay (lash) between the components in the driveline.
For example, the potential for a driveline clunk would be greater in a 4-wheel drive vehicle than a 2-wheel drive vehicle. This is because in addition to the freeplay from the rear axle gears, the universal joints, and the transmission (common to both vehicles), the 4-wheel drive transfer case gears (and their associated clearances) add additional freeplay to the driveline.
In service, dealers are discouraged from attempting to repair driveline clunk conditions for the following reasons:
^ Comments of driveline clunk are almost never the result of one individual component with excessive lash, but rather the result of the added affect of freeplay (or lash) present in all of the driveline components. Because all of the components in the driveline have a certain amount of lash by design, changing driveline components may not result in a satisfactory lash reduction.
^ While some owners may find the clunk noise objectionable, this will not adversely affect durability or performance.
#73 of 383 Re: TOD Check Light [troopernate]
Nov 15, 2006 (9:40 am)
Hi, see you are covering all the forums! Here is Isuzu info on gremlins with no apparent cause:
2001 Isuzu Truck Trooper LTD 4WD V6-3.5L
Vehicle Level Technical Service Bulletins All Technical Service Bulletins Electrical - Inspect Connectors for Various Malfunctions
Electrical - Inspect Connectors for Various Malfunctions
Inspection Of All Related Wiring Harness Connections
When Diagnosing Miscellaneous DTC's, Intermittent
Driveability Concerns, Hard Start, No Start, Incorrect
Gauges, Inoperative Air Conditioning Systems, Service
Engine Soon Lamps Illuminated, 4WD Lamp Illuminated,
Instrument Panel Gauges Inoperative, Cruise Inoperative
ISSUE DATE: SEPTEMBER 22, 2005
All Isuzu Vehicles
When servicing a vehicle for any type of customer concern, the following steps are imperative. Inspect and ensure the integrity of all related wiring harness connectors. If the wiring harness connectors are not properly put together or engaged before they are locked together, numerous types of intermittent conditions may occur, which may include any of the symptoms listed above and possibly others.
The first step in any type of electrical diagnosis is a visual and physical inspection of the wiring harness connectors for integrity. Many times, the vehicle may be repaired just by disconnecting and reconnecting the connectors. As with all repairs to wiring harness connectors and terminals, a pull test of the terminals within the connector should be performed. A pull test is performed by inserting the proper size terminal test tool (not a paper clip) into the terminal to determine whether or not the terminal is making good contact, or whether the terminal has been damaged from the prior improper connection or lack of connection.
NOTE : Most terminals used in current module connectors (ECM, BCM, and the like) are small O~64 mm sq terminals and can be damaged by probing with the wrong tool
For example, if the Connector C2 of the engine wiring harness to the Powertrain Control Module (PCM) is not properly seated into the PCM:
^ The cam lock lever may close improperly.
^ The cam lock lever may even snap out of position.
^ The vehicle may have an intermittent condition with any one of the components which are controlled or monitored by the PCM.
THE CAM LOCK LEVER IS DESIGNED TO PULL (OR ASSIST) THE CONNECTOR INTO ITS FINAL POSITION ONCE IT HAS BEEN PRESSED STRAIGHT INTO THE PCM HEADER PAST THE INITIAL DETENT, ALLOWING THE LEVER TO BE MOVED INTO THE LOCKED POSITION. It is not only a retainer but an assist during the connection process. When the wiring harness connector is properly connected to the PCM, a snap will be heard when the connector is in position to be fully seated. The cam lock lever may then be closed. The cam lock lever will then do its designated job as both an assist and ensuring the connector does not come apart due to vibration or other types of conditions found in vehicles as they travel down the highway.
Remember, if a terminal (metal) or the connector (plastic) is damaged, they should be replaced. DO NOT replace the complete wfring harness assembly. Some harnesses are now on order restriction since most harness damage can be repaired.
Replacement Terminals can be found in the J 38125 Terminal Repair Kit, which is available through Kent Moore at 1-800-654-6333.
#74 of 383 Re: 2001 Trooper S with automatic transmission [atfdmike]
Nov 16, 2006 (4:52 pm)
Thank you so much. I really do appreciate that and now I am a little more at ease. That was very helpful as now I don't have to worry to much about it. However I still have to have my front pump seal as I am losing a little bit of transmission fluid. Other than that the Trooper runs great especially the 4WD system as I was using it today in a drainage ditch. Thank you for all of the information.
#75 of 383 Re: Isuzu Trooper: Problems & Solutions [tidester]
Nov 16, 2006 (8:57 pm)
I RECENTLY PURCHASED A 1999 ISUZU TROOPER AND THE ENGINE SEIZED DUE TO A SUDDEN LOSS IN OIL. WHAT SHOULD I DO?
SOME SAY THIS IS COMMON. IF I OVERHAUL IT WHAT CAN I DO TO IMPROVE THIS ENGINE TO HELP PREVENT THIS AND OIL BURNING?
PLEASE ADVISE. dchoy40hotmail.com
#76 of 383 seized 3.5l isuzu
Nov 16, 2006 (9:01 pm)
IF I MAY I HAVE ANOTHER QUESTION ABOUT MY SEIZED 3.5L ISUZU:
WHO MAKES A REALLY GOOD OVERHAUL KIT FOR IT?
ANYBODY ELSE HAVE HAD THIS PROBLEM?
#77 of 383 Re: seized 3.5l isuzu [gmchevyman]
Nov 17, 2006 (4:37 am)
Hi, there is a long history of complaints about oil consumption by the isuzu 3.5 engine. You should do a forum search to see the history of owners with concerns about oil consumption. The factory allows for up to a quart of oil for 1000 miles as normal. As for rebuild kits, most name brand kits are adequate and generally priced competitively when compared to factory parts.
I looked through the technical service bulletins and found the following which is an excerpt and a link to the factory form:
1999 Isuzu Truck Trooper V6-3.5L
Vehicle Level Technical Service Bulletins All Technical Service Bulletins Engine - Oil Consumption Usage Testing/Reporting
Engine - Oil Consumption Usage Testing/Reporting
Engine Oil Usage Testing and Reporting
(This Bulletin Supersedes IB00-01-S002)
ISSUE DATE: OCTOBER 2004
All Isuzu Models.
This bulletin has been revised to include new detailed procedures when completing the new updated Engine Oil Usage Test/Report. Please disregard information found in Isuzu bulletin IB00-01-S002.
Before performing any warranty repairs, based on a customer's complaint of excessive engine oil consumption, the Engine Oil Usage Test/Report shown must be completed in full.
The updated Engine Oil Usage Test/Report is divided into two parts, PROCEDURE # 1 and PROCEDURE # 2.
Procedure # 1, the inspection and testing portion of the Engine Oil Usage Test/Report, are eligible for warranty submission. Procedure # 1 warranty claim may only be submitted ONE time per vehicle. Review Procedure # 1 Results and perform the appropriate action. Complete all steps in Procedure # 1 before continuing on to Procedure # 2 (if required).
Procedure # 2, the validation portion, is NOT reimbursable under warranty. Complete all steps in Procedure # 2. Review Procedure # 2 Results and perform the appropriate action.
The Technician, Service Manager and Customer are to acknowledge the findings by signing and dating the bottom of the Engine Oil Usage Test/Report. Attach a copy of the completed report to the back of the Repair Order (R/O) hard copy and provide a copy to the customer.
NOTE: 1. Normal authorization procedures must be followed for such repairs.
2. Information released on paper and electronic format prior to bulletin release cannot be updated. For the most current and up to date information refer to IsuzuONE.com.
ENGINE OIL USAGE TEST/REPORT FORM
This Service Bulletin is intended for use by professional, qualified technicians. Attempting repairs or service without the appropriate training, tools, and equipment could cause injury to you or others and damage to your vehicle that may cause it not to operate properly.
#78 of 383 Re: Water Pump Replaced, Now Engine Leaking [atfdmike]
Nov 24, 2006 (11:05 am)
1996 Isuzu Trooper V6 DOHC
#79 of 383 Any clues?
Nov 24, 2006 (7:26 pm)
I got my 1994 trooper back from getting tranny rebuilt. The car drove perfect until I was on the parkway and it started to lose power. I pumped the gas and could reach a high speed until I got to a hill. Still pumping the gas I made it. What gives- no noise- no check engine lite- just no power. i was using 89 gas. I was getting poor gas mileage too. 67miles to $15 gas 2.29/g. Could it be as simple as a fuel filter? I was thinking if it was an O2 sensor the check engine light would have come on. A friend driving behind me told me black smoke was coming out of the tailpipe. They told me to check and make sure my wires were secure and they were. I love this truck pls any clues?
#80 of 383 Re: Water Pump Replaced, Now Engine Leaking [kdadman]
Nov 25, 2006 (1:46 pm)
Hi, when the water pump was changed, it was necessary to remove the belt, which meant removing the fan, loosening the PS pump and removing the harmonic balancer and removing the timing belt cover. Now, if they only changed the water pump, and did NOT remove the hydraulic tensioner that keeps pressure on the timing belt, then they did not disturb the oil pressure system. If they did remove the hydraulic tensioner, it has to be correctly reinstalled or a leak can result. They did not have to remove the tensioner to change the water pump, but they should have "pinned" it when they removed the belt. If they were not careful in removing the harmonic balancer, they could have nicked the seal that it slides through, and that could result in a leak. In moving the power steering pump aside, they may have loosened or damaged a line. The PS fluid is automatic trans fluid, I think, for your year trupr, but you should check to verify whether it is or not. Identifying the oil type will go a long way towards eliminating possible problems.
Not related to changing the pump, but there was a camshaft seal that the factory issued a service bulletin about, but I would think it would be OK since you had not noticed a problem prior to the pump change.
I am not a pro, but I have the same motor. Hope this helps, good luck.
#81 of 383 99 Trooper - starter? solenoid?
Nov 28, 2006 (10:15 am)
My 99 Trooper has been a little sluggish to start in the last week or so. Our battery is only a few months old but last night my husband had to jump it off to get it to start. He added some water to it and had a parts store fully charge the battery. It didn't need much of a charge. However, now it won't even take a jump. We've tested the battery again this morning and it is fully charged. All connectors are clean. There is a clicking sound when we try to start it but nothing else happens. He said it could be the starter or the solenoid. Do you happen to know how to determine which of these it is? He is under the Trooper right now and he can't figure out how to get the starter out without removing the exhaust but we hate to do all of that if it isn't even the starter so I'm hoping to help narrow down the problem some. Any help would be greatly appreciated. We need a miracle because this thing needs to be running by tomorrow.