Well I have about 2000 miles on my new motor and everything is going good so far. I left town for about 4 days last weekend and came back to see that my rear main is leaking about 2 drops a day. I havent driven it since because I am real busy this week. I was wondering if it was because it was sitting so long? Im just concerned because im still running regular 10w30 oil and am planning on switching to synthetic the next oil change and know it will probaly leak more with the synthetic.
Rear main seal leaking after sitting for a couple days
- Thread starter gabe3586
- Start date
Redfire 05
New Member
My rear main seal started leaking almost immediately on my newly rebuilt engine. I've been told it is a common problem with the 5.0 motors. But maybe I'm wrong.
90lxvert13
Member
ive heard multiple reasons for this, either its from age, typical for the motor, problem with the pcv or the crank case isnt vented properly. if its a fresh rebuild check/replave the pcv or add a crank case breather. crank case pressure can build up if the pcv is clogged or if the crank case isnt vented properly, causing the leak. also if its a bigger cube motor (331/347) it may need a breather tank.
skunk21
Active Member
when i replaced my trans i put in a new seal. that was about a year and a half ago. its leaking already
+1 and i used a ford seal and followed all the advise on here on the install and mine leaks, although not has bad very minor but still
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