3406E leaking oil behind fan hub !!

I would check the gaskets again and make sure it’s not any of them. If they are good then I don’t know what it could be.

 

Silicone is a good way to build leaks into a Cat. Ask them where they put it and look there.

 

Probably because they didn’t bother resealing it when they did the engine. The gaskets and seals for that are in the set that comes with a platinum kit.

 

Oil can leak through the 4 bolts that hold the fan hub adjuster bracket thing to the block. At least that is what some say. Mine leaks their too. I pulled the bolts out, lathered with silicone and installed again. Definitely helped
Oil leaks happen. Re sealing the front cover is a pretty big job.

 

It could be leaking at front of head out from between head and block. That can take patience to see. or the bottom 2 studs that hold fan on. The head won’t budge if the cam spacer is not loose from the head. If they got violent enough I would worry about cracking the front cover. There is a plate between front cover and block sometimes it will leak after the bolts are disturbed. Also keep in mind the engine had 900k on it.....doesn’t have to be someone’s doing. It could just be time, especially being disturbed. There was no way around that some times that’s the price you pay.

 

Well the book hours you paid on that job include resealing the gear train cover. I’d start there with whoever did the work. Does your invoice show where you were discounted the hours and parts for that part of the job? Or did you pay for labour and parts you didn’t get?