Oil in injector housing?

[Dynomite]

Originally Posted by efnfast

Soooooo, I've got 91 IH coming for my 90. That means I need to do something. Are we still using freeze plugs, or have we come up with something better? Thanks Locobob for the heads up on this. This would have been a big stumbleing block trying to do this over a weekend.

Yep....this thread is a bit old but the technology stays the same


Adapting 91 IH to 90 Heads.

Three Dorman 550-013 plugs (two plugs drilled 7/32) were used to restrict IH PVC ports of the 91 IH (90 Heads do not have the required restriction).