Re: Oil in injector housing?
On the 91 I/H's that I have as spares there is no lip to stop the plug. You just have to eyeball it as you drive the plug to make sure you don't go too far in and have it fall into the cavity.
I am not sure what there is on a 90 I/H as far as a lip inside the hole. I never tried to pull out the plugs that were there from the factory.

Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member
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