🔧 OEM Crankcase CCV Breather O-Ring Vent Valve Seals for Ford 7.3L Powerstroke Diesel Review

I replaced the glow plugs in my 99 Superduty only to find the crankcase ventilation o-rings were stretched and unusable. Nobody in town had them, so that's my bacon.

Old o-rings are likely to dry out and deform when you remove the Doghouse when removing the driver's side valve cover. Buy them to replace them.

I replaced the glow plugs in my 1997 Ford 7.3 diesel. When I removed the PCV box on the valve cover, I noticed that the o-rings had been removed. My truck came from California and didn't start here in Ohio last winter. I diagnosed it with bad glow plugs, not a good one (probably not really necessary in California). I replaced all 8, not a very bad job, and in the 50 degree weather everything started fine. As soon as it got colder, it became difficult to start even with new glow plugs without an