Question about 2001 Chevrolet Cavalier

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How can i replace the mian bearings and rod bearings without taking out the whole engin?

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  • levon_h2003 Mar 10, 2009

    ok but can i get the out with the engin still in the car?

  • yadayada
    yadayada May 11, 2010

    U can't take the crank out without pulling the engine and then the trans off the engine,no matter what the other expert says, not sure what he says anyway, kinda gibberish wouldn't u agree?

  • yadayada
    yadayada May 11, 2010

    also u will need the crankshaft refinished or the new bearings will fail in a few thousand miles.

  • yadayada
    yadayada May 11, 2010

    no way

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If you pull the oil pan off and take the crankshaft off you will have access to both the rod bearings and main bearings. get yourself some plasta gauge for reassembly to make sure your clearances are correct. if you need any other help shoot me a message or email and ill be glad to help

Posted on Mar 10, 2009

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1999 ford 5.4 triton motor,can you repair a rod knocking without pulling engine


drop the oil pan & replace all the ( connecting rod bearings ) which wear out way more than main bearings. also replace the main bearings if bad. if the bearings are still good use them because of the timming chain is heck to get back to top dead center. hope this helps you out

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What is the problem? It is not necessary to disassemble the whole engine. Take the engine out of engine compartment, remove the transmission, fly wheel, front timing cover, timing gears, oil pan, filter gauze, and finally the crankshaft. Leave the connecting rods in place, only remove the bearing shells. Re grind the crankshaft to the specifications and install it back in the reverse order of dis assembly.








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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.

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