I need to replace the Crankshaft and bearings in my 2001 toyota 4 runner is it possible to change with out replacing the heads.

  • Welcome to the site. Are you saying this as if you don't want to take the heads off? If so and you want to replace a connecting rod, it cannot be done. To change the rod, the piston has to come out, which goes out the top of the block, which means the head has to come off. – Pᴀᴜʟsᴛᴇʀ2 Jul 11 '17 at 18:54

It is most probably possible to change crank and bearings, but to change the con-rod the piston has to come out so the head has to come off.

  • Ok what happen to my 4 runner is 1 of the connecting rods was loose so it messed up the crank shaft and the bearing so my macanic says we caught on time that it did not ruin the heads on it do you think that just changing the connecting rod and all the bearing and the crankshaft that it will run right. – Ida Higuera Jul 11 '17 at 18:56
  • If there was too much play due to that con-rod and bearing then the piston will have hit the valves which means the head will have to come off to sort them.... – Solar Mike Jul 11 '17 at 18:59
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    One more question ok if there were metal in the oil will the motor have to be cleaned out really good another macinic said that if it was not cleaned out really good the same thing would happen again. – Ida Higuera Jul 11 '17 at 19:05
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    Definitely yes and its probably more cost and time effective to take the engine out and have easy access. But that is what I would do... – Solar Mike Jul 11 '17 at 19:07
  • How rough was it driven? – Numair Aidroos Jul 11 '17 at 19:10

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