hello steve
i am in process of re assembling my 1989 911 motor, we noticed that my previuos mechanic used aviation permatex and RTV silicone sealer on my oil cooler and lower oil return pipes, what are your thoughts on this? seems some mechanics are reluctant to use either of these two products. thank you

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: 911 Engine Oil Cooler Replacement

I'm not a huge fan of RTV in the engine, but there are a few places where I recommend it (on the through-bolt o-rings, for example). I'm not sure why they would need to use it on the oil cooler. Just make sure all previous residue is cleaned off and you should be fine.

- Wayne