repairing leaks around roof vents

[DanSTL]

I finished sealing the entire front shell- used about 5 tubes of Dicor self leveling and 3 non self leveling and finished front shell except for the A/C shroud (it looked okay and ran out of time).

Problem: Received 4 hours of rain and roof held up beautifully, but 1 hour after the rainfall stopped I received 10 min of steady water drops from two driver side ceiling A/C corners (see pics) ....I suppose I will have to rip that out and redo the A/C shroud too?

Alternative fix? I read somewhere there are 4 screws on the A/C that can be tightened from te inside, a possible easy fix to this A/C leak, can anyone confirm that?

Before I redo the shroud, anyone have any ideas on how common a leak from the A/C shroud is? or any thoughts on what else might be causing?

[Wavery]

You might want to try removing the interior panel and tighten the 4-screws that hold the A/C unit to the roof. The A/C unit sits on a big, thick, square, rubber gasket. That gasket gets compressed over time and can cause a leak. Tightening those screws recompresses that gasket.

[DanSTL]

How do I get at the 4 screws? Am I removing the ac panel from inside or the frame (9 screws) around AC from where the leak is coming ? Thanks

[Shane826]

Remove the ceiling mounted control panel to get to the four compression bolts. Just a little turn will do… Over compressing is just as bad as under compressing seal.

[Wavery]

Originally Posted by DanSTL

How do I get at the 4 screws? Am I removing the ac panel from inside or the frame (9 screws) around AC from where the leak is coming ? Thanks

[Kwantau]

50 inch pounds is required for the four bolts

[Shane826]

That’s what they say… But when I replaced mine, using a torque wrench, it never hit 50in/lbs. The gasket was completely compressed before the wrench clicked.

[Kwantau]

I guess it depends on the density of the foam gasket. On mine I had no trouble maintaining the torque setting.

[DanSTL]

Originally Posted by Shane826

That’s what they say… But when I replaced mine, using a torque wrench, it never hit 50in/lbs. The gasket was completely compressed before the wrench clicked.

Same here, just kept spinning with no click or give so I stopped after a couple of turns. It was dark and I didn’t climb up to do a before/after of the gasket, but hopefully this improves the situation and I didn’t over torque.

Next I’ll strip old caulk, clean, and recaulk AC riser.