Are you leaking oil behind your harmonic balancer? You probably need a new front crank seal. Did your seal groove your harmonic balancer? Could be either or it could be both. My harmonic balancer was grooved from the OEM seal. This is why mine was leaking. Of course the seal was no doubt bad too and I changed it. What to do about the harmonic balancer? You sleeve it with a thin band of metal. It resurfaces the shaft giving the seal a smooth surface to seal against. It was easy to do. You can gently tap it on or press it on. I have a Harbor Freight press so I pressed it on.

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Stanton
'88 Formula, red on gray

Nothing new there and been available for 40+ years and fit most engines.

This should have direction to use some type of "sealer"/"glue" to install them.
Otherwise can leak oil between sleeve and balancer.

If you buy a timing cover gasket set w/ a sleeve often comes w/ correct "glue" but buy only the sleeve may say nothing about this.

When you drive/press the sleeve, wood or plastic to spread impact/force and hit that in the middle so doesn't tilt or easy to wreck them.
GM etc has plastic tools to install for this reason.

Installing new seals need thin coat of Super 300 and related on outside to stop small scratches on metal leaking oil.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

No, nothing new. I did install it correctly with the proper lock tight fluid. My post was a PSA type post. I myself didn't know such a thing existed. Hopefully others have learned now as well. Good for you if you already knew.

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Stanton
'88 Formula, red on gray

Just looked @ pictures again, Look for a replacement balancer.

Rubber starting to show signs of problems can fail completely w/ little warning. How soon is anyone's guess. Iffy balancer might last years or days.
Outer ring may already slipped and timing marks are off. "Quick" check is make sure #1 is at TDC and see if Timing Mark says same.
If ok, Mark the face of the unit so can easy see if outer "ring" slips.

Outer Ring can slip w/ dying rubber before rubber fails outright as you hit the gas or engine brake stick cars or backfire.

think some company rebuild them. dig thru v6 balancer threads.