Question about 2000 Jeep Grand Cherokee

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Changing rod bearings

Do I haft to raise the engine to get the oil pan off

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Yes you will have to raise engine to pull pan, but more importantly is why do you need to change rod bearings? If they need replacing you will probably have to change the mains as well as rings and so on. If you have run it knocking, you could have damaged the crankshaft and new bearings won't stay. Suggest you check a little deeper before going to all this expense.

Posted on Aug 02, 2008

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I have oil in the care but the oil pressure not raising


if oil level okay in car,have oil pressure checked should be 60 psi @ 1850 rpm if not,your oil pump faulty or you have worn engine bearings.if oil pressure is low you will hear rod bearing noise like engine knocking bad, thats bad news engine damaged.if oil pressure okay, you could have faulty oil sending unit or oil level sensor on oil pans faulty.have vechicle code scan before buying new oil level sensor.

Sep 08, 2012 | 1995 Buick LeSabre

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HOW TO REPAIR A ROD BARREN ON A 1995 GEO STORM PRIZM


Ok, if you mean engine rod bearing, you would need to take the oil pan off to get to the bearings.
If you mean one of the axle bearings you pull a wheel.

Jun 24, 2012 | 1995 Geo Prizm

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1995 Isuzu 5500 box truck 6 cyl diesel. truck overheated and water&coolant ended up in the oil pan and the motor ended up locking down. Can only spin fly wheel 1/2 to 3/4 revolution besides changing...


The connecting rods are probably frozen to the crank from overheating or the bearings are frozen. Pull the oil pan off and inspect the connecting rod bearings for a blueish coloring which is a sign they overheated. If they are you'll need to replace them all and have the crank and connecting rods turned.

Mar 01, 2011 | Isuzu Pickup Cars & Trucks

1 Answer

2002 Wrangler Sport. 4.0 My oil pressure gauge hit rock bottom, the engine made soon clanking sounds and died. I pulled the valve cover but dont see any bent rods. What else should I be looking for...


The main bearings and connecting rod bearings. The cam bearings. The wrist pins. These are the first bearings that get oil from the oil pump. When you take the oil pan off to replace the pump pull one of the rod caps and check for scaring and color change.

Feb 15, 2011 | 2002 Jeep Wrangler

2 Answers

Oil pump replacement


This is a major job. you have to remove the engine mount bolts, raise the engine to the point that it's raising the vehicle, remove the oilpan on the bottom of the engine, remove the oilspash pan, then remove the oil pump. Are you sure this is what is wrong? Oil pumps last for almost ever. If you ran it out of oil, it is most likely main and rod bearings. If you didn't run it out then it could be an oilsending unit gone bad. If you give me more details I can narrow it down. your year should not need an oil pump.
Randy

Nov 13, 2010 | 2006 GMC Envoy Xl

2 Answers

I have a 2002 ram 1500 with 4.7 magnum truck


There are several reasons why you would hear a loud knock from the engine, and the knock will usually be either in the top end or in the lower or bottom end of the engine.

The first thing that should be done is to drain the engine oil, and then pour the oil filter into a pan where you can see it, and if there is a lot of metal flakes, or a fine cloud of brass floating in the engine oil, you will not want to waste the time or the money trying to repair that engine by dropping the oil pan and replacing the piston rod bearings, it will only be a very temporary patch at best, that is if the patch even lasts for a day.

If you do find metal flakes in the engine oil and oil filter, the piston rod bearings will not be the only bearings in the engine that will need to be replaced, and the crankshaft main bearings can only be replaced by removing the engine and placing it upside-down on a good engine stand. The biggest problem would be that even if you did successfully replace the piston rod and crankshaft main bearings, it would only take one piece of metal flake that was left over in the engine block to find its way to one of your new bearings and then it will take no time at all before that engine will be right back where you started, and that is how important just the cleaning process is in repairing or replacing internal engine components.

If you do not find any metal in the engine oil or oil filter, then you should attempt to find the actual cause of the knock before you decide how to repair the engine, and you will have to remove the engine oil pan to inspect the rod bearings, and if you do remove the engine oil pan make sure that when you inspect the rod bearings that you only do so one at a time because you can not mix up the rod caps, and be very sure that when you remove a rod cap that you do replace it the same way that it came off, and if you turn around the rod cap and install it the wrong way or scratch the crankshaft bearing surface the rod bearing will fail.

If you can hear the knocking louder from under the vehicle then the most likely causes for a lower end engine knock are a damaged piston, worn out piston rod bearings, a broken piston rod, a broken flex-plate, and sometimes loose torque converter to flex-plate bolts, and the only parts that you can really check out without opening up the engine would be a broken flex-plate, or for any loose torque converter to flex-plate bolts.

If you can hear the knocking more from the top of the engine, then the most likely causes for an upper engine knock would be a faulty lifter, or broken rocker arm, or a broken valve spring allowing the valve to contact the piston, and it will require the removal of the valve covers and possibly the intake manifold to inspect for the problem.

If you have any doubts then it would be a good idea to consider a good used engine that you can hear run before you buy it, or a rebuilt engine for that vehicle.

I hope that this information will help you out and save you some time and a lot of money.

Jun 07, 2010 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

On a 2002 isuzu trooper 3.5 V6 with auto and 4wheel drive do i need to remove engine to pull oil pan? i have a loud banging in motor and need to check crankshaft & bearings


Yes, you need to pull the engine to remove the oil pan. This requires that you remove the propeller shafts and the third cross member to slide the transmission toward the rear of the vehicle. I suggest you purchase a service manual before you start this process. More than likely the rod bearing for cylinder 1 has failed. This seems to be a common problem with later model 3.5L Trooper engines because the oil pump and oil gallery do not deliver oil as efficiently to the number 1 rod bearing.

Apr 26, 2010 | 2002 Isuzu Trooper

1 Answer

Help on changing oil pump 0n 1999 jeep wrangler


Pump is fairly simple...remove pan unbolt pump and reverse procedure. It is good to pre-lube pump and fill oil filter before starting engine. BUT: Keep in mind that a damaged pump is generally not the cause but the result of a failure elsewhere. Primary reason is rod or main bearing wear, resulting in debris scoring the pump gears and internal surfaces. Therefore, changing the pump will at best, slightly raise pressure only for a very short time. If after removing the pan, you find that the pump pickup is nearly blocked off by hard carbon deposits, you may have a chance of regaining pressure, providing bearings have not been damaged by low oil suppply caused by that restriction.

Jun 10, 2009 | 1999 Jeep Wrangler

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Jeep cherokee with a 4.0 6 cyl when a start the motor cold it sounds like a diesel engine, lots of clanking. last a couple of seconds then goes away. replaced oil pump. no help there.


Lots of clanking when first started sounds like a worn rod bearing. Check the engine compartment and rev engine to listen for knocking. It will get progressively worse as time goes by. Nothing to do except buy/install new crankshaft kit from autozone, about $300+.

In the mean time, just change oil and put in some oil additive to lessen the knocking. High speeds will accelerate the wear of the rod bearing. The rod bearing is installed inside of the piston rod. This bearing goes around the crankshaft. It has very tight tolerances down to the thousands of an inch. When it gets worn, metal will flake off of the soft bearing material and contaminate your oil more. If you catch it early enough, you can replace the bearing without too much trouble. Here is what you need to do.

Find the bad bearing. If you hear the knocking with the engine on and under the hood, disconnect a sparkplug. If the knocking goes away, that is the bad bearing. Do this disconnecting/reconnecting until you identify the bad bearings. Now disconnect battery. Next loosen drive belt- done from steering pump. Loosen 2-13mm bolts on back, one on top and one on bracket on bottom. On bottom right-hand side of pump will be a long adjusting bolt. Loosen turn this bolt counter clockwise to loosen drive belt. Now jack vehicle from the frame, vehicle will raise but tires will remain on ground. keep going as high as your jack will go. Install jack stands on frame. This extends your suspension and keep body raised. Drain oil, remove steering damper. It's the shock absorber looking thing connected to your tie rods/center link. The easiest way to remove the oil pan is to get a 3/8 inch socket adapter for a cordless drill. The bolts will come out in a hurry if you do this. Keep track of where the double sided bolts are, they secure the fuel line brackets. After all are removed, wiggle, tug, and pull pan out. Now you will see the large main caps and the rod caps. The mains are bolted to the block and the rods will rotate up and down with the spinning of the crankshaft. Spin the crankshaft to see. Each bearing cap needs to be marked. Use a center punch and hammer to mark from front to rear. 1 mark for rod cap 1 and so forth. You should end up with 6 marks on rod cap #6. Do the marking on the front side of the cap so you know how it fits back. Remove the rod caps that corresponded to the bad bearing identified earlier. Remove nut on cap. Wiggle cap back and forth until it comes loose. It will eventually come out. Inside the cap, you will see the bearing. It is basically a liner for the cap that rides on the crankshaft. there is one on the top of the rod too. Remove it by pushing rod up into cylinder and pulling it out with your hand. Ensure you remember the orientation of the bearings. One side has a notch, the other has a key that fits into a hole on the rod. Now you have the bearing in hand, check for scoring, or wearing on the face. Check the web for a nice color picture. Feel the crankshaft bearing area with your finger nail. It should be smooth and not ridged. Purchase some plastigage along with a standard .000 bearing. Clean rod surface, install new bearing and plastigage. Tighten to torque. Remove cap and measure plastigage for your oil clearance. Now you can purchase the correct bearing to match your oil clearance. If you don't have a repair manual, now's a good time to get it. It has bearing tolerances for you to get the correct bearing. After you have the correct bearings, use oil additive to grease up the new bearing/crank surfaces. Put everything back together, put some quality magnets inside of your oil pan near the drain hole and cross your fingers.

Nov 20, 2008 | Jeep Cherokee Cars & Trucks

2 Answers

1998 dodge intrepid 3.2L


Most likely, you'll need to raise the engine a bit to get the oil pan to clear the crossmember and the crank throws. This is not as hard as it sounds, but you will need a lifting bar to raise the engine and remove the bolts from the engine mounts. I would get a manual for this car as they are not the most intuitive to work on.

Aug 03, 2008 | 1998 Dodge Intrepid

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