How to replace rod bearings from oil pan on a 1999 Grand Am 2.4L

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The oil pump can be changed without pulling the engine.

The impressive looking thing is the balance shaft assembly. These counter-rotating shafts balance out the inherent vibration of the engine. You can remove it, as long as you do not disrupt the gear placements relationship to each other. The balance assembly is set to a specific point.

SOURCE: '93 Chev Suburban engine knock, sounds like rod

MAKE SURE THE CRANKSHAFT IS NO DAMAGED.IF IT IS THE NEW BEARINGS WILL GO BAD QUICKLY

SOURCE: can you replace the rod bearings from underneath

It's possible, but if you have bad rod bearings, you probably have to get the crank re-done. In other words, if it's knocking, your problem is bearings and crank, not just bearings.

Testimonial: "Thanks Will inspect to see what type of damage there is to the engine. Hope it's just the bearings. Thanks for the reply"

oneStan

• 617 Answers
• Posted on Feb 22, 2010

SOURCE: changing rod bearings

You'll find that once you've removed the connecting rod cap, that you can easily replace that one of course, so take a small screwdriver and use it to push up on the other bearing, on the side that doesn't have the notch, you should be able to also push up a hair on the rod to get a little slack, but the bearing will slide around the crank and you just reinsert the smooth part first, kind of just the opposite of what you just did to reinstall. center the bearing in the rod, pull the rod flush with the crank and reinstall the lower cap and torque to specificatioin.

Of course, lots of oil on the bearings & crank, if there is damage to the crank, you may want to turn it enough with the cap & rod not on it to polish it a bit with emory cloth.

Clearance shouldn't be a factor but you must torque to the exact specs to get the correct "crush" on those bearings and provide proper contact, while not being too tight to cause immediate breakdown by not letting the oil pass & lubricate the crank.

Hope that sheds some light on it. Crank bearings can be changed the same way.

good luck.

SOURCE: can you replace rod bearings and thrust washers by

Yes you can. Drop the pan and pump and pickup tube and access the rod and bearings.