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Does the head end of fuel injector line have some type of Teflon grommet or is a metal to metal contact. 

 

Could I clean up the cross over tubes and replace the o-rings and re-use them. I cleaned up cross over tube for #1 cylinder. It is pitted.

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It's all metal to metal, I have used a 2000 sandpaper before to clean up my lines, because someone over tightening before and put a groove in them, but I've never touched crossover tubes where lines or injectors mate. You can clean them on the outside with no problems.

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I stil run the oe ones in mine. I just clean them up with a scotch brite on the mating surfaces, new o ring and stick them back in. 

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I have since replaced my cross over tubes since the old ones were starting to really sit deep into the head. I would use Emory cloth or the finest sand paper you can get your hands on, and take it easy with the sanding, smoothing out a surface is great, but making a high pressure leak is another thing..

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