I need to replace the Crankshaft and bearings in my 2001 toyota 4 runner is it possible to change with out replacing the heads.
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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 ♦Commented Jul 11, 2017 at 18:54
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1 Answer
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.
answered Jul 11, 2017 at 18:50
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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. Commented Jul 11, 2017 at 18:56
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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.... Commented Jul 11, 2017 at 18:59
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1One 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. Commented Jul 11, 2017 at 19:05
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1Definitely 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... Commented Jul 11, 2017 at 19:07
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