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Old 08-09-2019, 12:33 AM   #84
Scooby Newbie
Member#: 275099
Join Date: Feb 2011
Chapter/Region: NESIC
Location: Cape Cod, MA

Originally Posted by nucci View Post
99.55 requires the bore to go from 3.9179 factory to 3.9192-3.9200 depending on desired piston to wall, they are NOT and could never be drop-ins.

Additionally they ship with 99.50 Total Seal rings which out of the box have first and second ring gaps in the .021-.026 range in the 3.9200 bore, which in my opinion is too loose for a non-race engine, and the oil rail gaps are huge if you care about those.

I just did this and I ended up getting them to work by buying a 99.75 set of the same rings and mix-n-matching to gap them to .018/.019 first and .025/.026 second.

Highly would not recommend, do drop-ins and wait to blow a head gasket or spin a rod bearing, or properly hone to 99.75 and buy those.
Rewind. I never said they could be dropped in. I'm saying they are the smallest useable size on a seasoned case. They'll obviosuly require honing. But that's the point. You can't just seat new rings on a worn crosshatching. Drop-in's are for a new case. And yeah. Those gaps put of the box do suck. Your second ring is still on the loose side IMO.
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