Question about 1994 Isuzu Trooper

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I removed a 3.1 Isuzu engine out of a doner vehicle 12 months ago. Before doing so I drove the vehicle and was happy with the engine. I have just fitted it into my Trooper and when I started it, the engine was ticking as though there was a loose tappet. We have checked the valve clearance and it is spot on. The ticking does come and go every now and then but most of the time it is very prominent.I have wondered if this could be an injector that may be sticking with the engine standing for a while. Can anyone shed some light.?? Thanks.

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I would guess that a lifter is kind of sticky after sitting so long.The cars engine may not of had enough oil and filter changes before you got it.
I was working at a auto shop one time and this guy brought in this car thats engine was makeing noise and even smoking some. The boss told me to make sure the engine was a quart low on oil. So I drained about 1.5 qts out. The boss gave me a quart can of Marvel Mystery Oil and told me to put all of it in the guys car.He told me to start the car and let it idle for a couple of hours, checking once in a while to make sure the car was ok. The car sat idleing and slowly stopped makeing any noise and the smoke almost completely disapeared.
Marvel is a heavy detergent that kind of flushed the engines dirt into the old filter. I then did an oil and filter change.
If I didnt see it I would not beleave it.I hope this helps you.

Posted on Sep 11, 2009

Testimonial: "Cheers for the feedback. Looks like I'm off to get some Marvel.!!!!"

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1a. Fine some comfortable eye glasses (clear or yellow) and keep them on. There are plenty of opportunities to get debris in your eyes during this procedure.

2. Spray "PB Blaster" (loosens bolts) on two bolts that secures alternator.

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4. Using a 10mm open-ended wrench, loosen the bolt that swings the alternator. Screwing the bolt "in" or toward the engine will allow play to increase in the alternator belt. Loosen the 12mm bolt slightly next to the 10mm bolt (approximately 1.5" toward engine).

5. Continue to loosen 10mm bolt until there is enough slack in the belt to remove the belt from the alternator pulley.

6. Remove belt. It may be possible to remove belt without removing fan faring. Maybe not. If not, you will need to remove plastic fairing. If you must remove fair, go below fan fairing and disassemble connectors that hold together pieces of fan fairing. Carefully remove.

7. Install alternator fan from above.

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9. Secure 10mm and 12mm bolts. Recheck tightness.

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12. Reassemble fan fairing (if not already assembled), re-connect battery terminals, and have a nice day. :-)

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