Resolved Intake question

d fed

Member
Aug 19, 2025
4
1
13
Vancouver
Hey I've had a "mechanic install upper and lower intake on my 89 5.0 and I noticed he sealed this off with rtv. This is the second attempt and I feel there is going to be a 3rd go at it.. what are the potential problems if any with this being gone around completely with rtv? Thanks in advance
Screenshot_20250819-042037~2.webp
 
Hey I've had a "mechanic install upper and lower intake on my 89 5.0 and I noticed he sealed this off with rtv. This is the second attempt and I feel there is going to be a 3rd go at it.. what are the potential problems if any with this being gone around completely with rtv? Thanks in advance

Did he use gaskets?
 
Somebody else help me out here.

It's early, and that image was taken with a potato but... That looks like the PCV port to me. There should a screen and a gasket in the hole and then a PCV valve inside of the gasket. I've seen them blocked off before but that is [not] recommended (by me, anyway).


RTV only on the china wall is how I do mine as well. I let the RTV set up for a while before installing the intake. Cork gaskets suck. Permatex Black but some others are suitable as well.
 
  • Like
Reactions: Scrapla347
That is a plug for an oil galley.
It is not used once the block was finished being machined.
Sometimes that plug can seep oil.
I see no reason why you should not seal it with a RTV sealer.
It just insures that you don't have a potential leak down the road.
Okay just making sure he didn't seem to know what he was doing for the most part... Thanks for the info i really appreciate it.
 
  • Like
Reactions: Bullitt347