86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Oil leak help

Old 03-16-2019, 06:36 PM
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Oil leak help

Hello YotaTech,

​​​​​​Long time lurker here, first time posting.

All of you guys in the forum have been extremely helpful in getting my truck running and on the road.

I have a 1993 4Runner with a 3vze and in the last couple of weeks I've developed a oil leak that has been getting worse pretty rapidly and I'm now loosing about half to one quart of oil a week coming from the front of the motor.

Now it might be my oil pan or crank seal (I hope not) but I suspected a cam seal and pulled off the upper timing cover. The passenger side looks oily, but I can't tell if it is leaking from there or not.

I was wondering if you guys can see anything that isn't apparent to me.

Thanks a ton in advance!
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Old 03-16-2019, 08:14 PM
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The first simple thing I would do is clean the motor completely.
If your loosing that much oil you shouldn't have a problem finding the leak after cleaning.
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Old 03-17-2019, 05:52 AM
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Always my advice, too, except that 1993_3VZE has the engine apart. He could clean it, reassemble it, then run it. But if the cam seals are the issue, they'll be covered back up.

So I think I'd clean the inside of timing cover as well as practical, then without reassembling anything, crank it. (Disconnect the primary lead to the distributor to stop spark, AND the connector to the VAF to stop fuel). At the rate you're leaking, cranking should develop enough oil pressure to tell you where the leak is.
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Old 03-17-2019, 07:18 AM
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I'll clean some stuff up when I get a day off of work. Hopefully tomorrow. Thanks for the ideas.
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