I don't know about the tacky sealant, but I can tell you on the seal between the upper and lower timing chain cover is not as hard as it seems. I did mine, the trick is not to remove the alignment pin. There is a groove that the gasket sits in on the top cover. I put a little sealant (very little) to hold it in, and a little dab at the ends of the seal where it butts up to the head. Then I slowly worked it into place, moving it in, then back a little to keep the seal in place. This was done 2 years ago and still is not leaking. I can actually still see the green seal between the two covers. Your sealant may be tacky because it is oily? I don't know, but when you do this job you got to really clean the parts up before re-assembly. I live in Plano, if you need help let me know! Good luck!
Brian

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Brian W. Heitman

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