96 850 non-turbo | vacuum issue after PCV job

[jdw]

I replaced the PCV system on my 96 850 non-turbo a while back. Keep getting 'large vacuum leak' CEL codes. Determined with a smoke tester that the top hose from coming from the PCV system doesn't seal well at the plastic connection into the air intake.

Attached picture shows the unit taken apart. The rubber seal (not in the picture) doesn't seem to be sufficient for a proper seal. The PCV line is OEM Volvo. How to resolve? Can I seal with RTV silicone?

Also noticed some leakage where the intake connects to the manifold.

Thank you.
JD | SF bay area | 96 855 GLT manual 210k miles

[erikv11]

It looks like the car is missing the o-ring for the flame trap housing?

If you mean like this, for the RTV (or a tidier version of the same thing?), worked great for me as long as I owned the car I did it on:

[jdw]

The o-ring was installed but missing from my picture. The o-ring is not doing its job. I will try the RTV approach like shown on your your image. Thank you.