Question about 1989 Jeep Cherokee

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1989 jeep cherokee makes loud knocking noise in straight line six 4.0 engine. Engine does not smoke and does not appear to have a miss.

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Wat about a alel leaking oil after u change the hub assembley on the right front axel

Posted on Mar 22, 2010

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Four things can give you a knocking noise. 1. failed rod bearing 2.failed main bearing 3. Bad piston wristpin 4. broken flex plate (auto trans)
If It's a bearing, likely you are seeing lower than normal oil pressure. Any bearing repair requires the pan to be dropped but to do the job correctly requires engine removal, crank re-grinding or replacement and oiling system cleanout (expensive). Wristpin (piston/rod assembly) can be serviced without engine removal but pan and cylinder head need to be removed. Flex plate is pretty much a trans remove and replace, with new wheel.
Only a good experienced tech can differentiate between the noises so I suggest you seek aid in your diagnosis, though, if either bearing or piston is the problem I'd likely find another engine before considering the repair.

Posted on Jan 26, 2010

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1 Answer

2005 jeep cherokee engine knocking and blowing oil


blowing oil where.?

SMOKE or liquid oil.

but id be all over noise, and liquid oil, like a wood pecker finding grubs.

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Knocking noise


First confirm the oil level is adequate by checking the dip stick. If the oil level is okay you may have a partial blockage that is starving the oil line leading to the sensor. Missed regularly scheduled oil changes may result in this happening.
If sludge is the problem your dealer can recommend an oil additive that may clear out the problem.
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2000 jeep grand cherokee has a loud knock in engine. Started out as a ticking sound like a lifter, know it is a loud knock. This is a V-8 Engine


If the noise still sounds like it's on top, I'd remove the valve covers and check the rocker arms to make sure they aren't broken or worn. Also crank the engine over and observe how far each travels. If any are different, a lifter or lifter and cam have gone bad.
If your oil pressure is low or the noise is deep inside the engine, likely you have a crank bearing problem. In most cases it's more economical to get a scrapyard replacement rather than do a rebuild.
Before doing anything like that, have an experienced tech listen to it. Only other thing that can make a noise like that is a broken flywheel. A good tech can tell the difference between noises and give you better advice than I can because he can hear it.

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Where is the knock sensor located on my 92 Jeep Cherokee 4.0L straight 6 4WD?


I don't see the knock sensor on the 4.0L engine. --- COMPONENT LOCATIONS Fig. 1: Electronic engine control component locations - 2.5L engine shown 91074g07.gif
Fig. 2: Overhead view of the (A) automatic idle speed motor, (B) MAP sensor, (C) crankshaft position sensor wiring harness, (D) air temperature sensor, and (E) throttle position sensor - 1992 Cherokee with the 4.0L engine shown 91074p15.jpg
Fig. 3: Electronic engine control component locations - 4.0L engine shown 91074g08.gif
Fig. 4: Electronic engine control component locations - 5.2L and 5.9L engines (Part 1 of 2) 91074g05.gif
Fig. 5: Electronic engine control component locations - 5.2L and 5.9L engines (Part 2 of 2) 91074g06.gif
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2 Answers

What is the firing order for a grand cherokee laredo. I change the distributor for sgrand cherokee laredo jeep. I lined up tdc, had the rotor turned to number 1, but it is still missing.


You didn't post your engine size so please choose the apprpriate diagram:



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1989-98 2.5L Engine firing order: 1-3-4-2 Distributor rotation: Clockwise



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2.8L Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise



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4.0L Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise



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1 Answer

Routing diagram for sperentine belt for 4.0 engine


Click of the following direct, Free Link. It has several Serpentine Diagrams, including the one for your 1989 Jeep Cherokee 4.0L In-Line 6-Cylinders based upon your Engine Options (AC/No AC, Power Steering/No Power Steering, etc.). The Link Page ALSO has the 2.5L In-Line 4-Cylinder Serpentine Belt Diagrams with their various engine options.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/1989/make/jeep/model/cherokee/1989_jeep_cherokee_drive_belt_routing_diagram.htm

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Likely you need more than one (not rod, but rod bearings) In most cases you get knocking noise and low oil pressure as symptoms. If caught early you can do this in-car otherwise engine needs crankshaft and all bearings as well as new pump and system flush.

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