Valve in rear oil cooler header

dave186

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May 19, 2011
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Hi guys, I just resealed my oil cooler yesterday and when I pulled it off the engine, a valve popped out of a hole on the rear header. It wasnt the one right above the oil filter that I have read about coming out. Its in the header where it mates to the block, there is a hole in the gasket where it goes. Anyone know what it does? I have a 95 and it looked like it was just staked in, just like the bypass valve. I put the thing back in and staked it again and all seems fine Im just wondering what it does.
 

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