Toyota 4Runner Oil Cooler Seals Replacement 4x4 (1996-2002)

My 1997 4x4 Toyota 4Runner recently developed an oil leak. After the dealership quoted me $1000 to reseal the oil pan, I decided to take a look into the issue myself. I initially replaced the dipstick o-ring which had become dry rotted over the span of 24 years, however the leak was still there. Next I degreased the area and waited for the leaks return. After seeing an accumulation of oil dripping from the block/where the oil cooler sits, I decided it was time to attack those seals. Upon this repair, I found a blockage in the oil cooler as well as the coolant line running into the cooler. After replacing the seals and clearing the blockages, I reinstalled and degreased the area, and drove about 500 miles to check if the leak returned. The leak is now very minimal, which now narrows down the 2 easy fixes to just the oil pan seal. At least now with these other 2 out of the way I know the pan is all that's left !
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• Toyota 4Runner Oil Coo...

[@smrtnz5995]

You have my respect for being thorough in this task. This is a tribute to this motor to run with the radiator and the oil cooler clogged. Funny moment when you were saying “Oh God, Oh my God” and your Mom comes out to ask you if everything is ok. Thumbs up and subscribed!

[@jimmartin9440]

Most likely it was stop leak. Someone was trying to fix a leaky radiator or a head gasket.

[@richardramon9277]

Good job

[@Sami-bc9iv]

Thank you for the video. How did you access the oil cooler?

[@AutorRepairReviews]

I accessed the oil cooler through the driver wheel well

[@shimetobago9586]

@@AutorRepairReviewsnice

[@gypsymoontarotofficial]

Guess this is how/why the Pink Milkshake happens. Funny how Toyota never lists this as things to inspect at certain mileages smh

[@Melody666Nikki]

This isn't the item that causes milkshake. Its the owner failing to replace the radiator that is integrated with the automatic transmission cooler. Replacing the radiator every 10 years max or every timing service prevents milkshake.

[@mshieh70]

Could not see anything