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I had a big oil leak in my 93 4.3 Blazer when I bought it and it turned out to be the remote oil filter block on the engine where the oil filter normally would go. There was a big O-Ring that was broked allowing oil to leak past it. I got an oil cooler repair kit from NAPA and it had the O-Rings to replace the broken one plus the oil line O-Rings. I had to remove a strut that went between the oil lines and remove the oil lines from the adapter so I could remove the adapter from the car to clean it and replace the O-Ring in the block.

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17y ago
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Q: How do you repair oil leak from the motor on a 1991 Chevy blazer?
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