Knocking 3.0. Need advice.
#1
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Join Date: Dec 2005
Location: MN.
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Knocking 3.0. Need advice.
I bought a 1991 4 runner with a 3.0 and auto. It's got 135,000 miles on it. 3 days after i bought it i changed the oil and it promptly developed a knock. I pulled the front diff and dropped the oil pan hoping it was a rod bearing. It's not. Looks like a main. Best i can tell either the motor or tranny has to come out to get to the mains. If i go to that much trouble is it worth the risk just doing bearings or maybe a crank kit or am i asking for trouble? Basically i don't wanna do the job twice. Should i just get a reman motor or try to find a lower mileage used unit? Are the bottom ends on these things known for being problematic? The truck is from New Mexico and is MINT. That is the only reason i'm even considering fixing it. Maybe i should just cut my losses and move on. I need some advice from people that are experienced with these things as i'm not.
Thanks.
Thanks.
#2
Registered User
Originally Posted by Newbomb Turk
I bought a 1991 4 runner with a 3.0 and auto. It's got 135,000 miles on it. 3 days after i bought it i changed the oil and it promptly developed a knock. I pulled the front diff and dropped the oil pan hoping it was a rod bearing. It's not. Looks like a main. Best i can tell either the motor or tranny has to come out to get to the mains. If i go to that much trouble is it worth the risk just doing bearings or maybe a crank kit or am i asking for trouble? Basically i don't wanna do the job twice. Should i just get a reman motor or try to find a lower mileage used unit? Are the bottom ends on these things known for being problematic? The truck is from New Mexico and is MINT. That is the only reason i'm even considering fixing it. Maybe i should just cut my losses and move on. I need some advice from people that are experienced with these things as i'm not.
Thanks.
Thanks.
#3
Do everything while you are in there! Bottom end on the 3.0 is solid... since the rest of the vehicle is mint, it's worth fixing IMHO. Good Luck and keep us posted. As you can see there are several members that can help if you run into problems!
Bill
Bill
#4
After my recent top end rebuild and successful running...my bottom end developed a knock. So if ya pull it then I would either say rebuild fully or go with orient engines remanned motor.
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