Just had the engine redone by a Buick builder in the midwest. Within 500 miles the rear main is leaking. Mike D.
Guys and Gals, Excessive crankcase pressure is typically the cause of a leaking rear main seal. Add some breathers or if your racing open headers then add a header evac system.
guess im lucky my street car and race car are bone dry underneath. :TU: or maybe its my engine builder o No: :laugh:
My original 455 had a leaking rear main seal (rope).This 462 now has a T/A 1 piece (no leaks yet) I am just waiting uzzled: Jeff,are you doing the rear main when you pull the trans?? Are you still pulling the trans?? Later,Tony
leaky rear.... John is right on... If you have excessive crankcase pressure from either too much ring leakage..too much compression...or a faulty ventiation system they will all leak ..... try making sure your pcv is working proper or better yet your scavanger system and it should stop the leaks.....that is unless you have a rope type in which your just plain old screwed... :laugh: The scavenger is the best as your engine really would rather burn good fuel rather than contaminated fuel oil vapor.... :3gears: Mark
HUH...u mean theres a seal in that there rear?? i coulda swore that was just a different way to do an oil change..LOL ou: hey mark, whats a "scavanger system"? not familiar with that term.
I didn't vote (since it's a Chevy) but everything I own leaks! My Farmall leaks so bad that when I had the motor apart (so there was no oil in it) ... it still leaked! I thought that was as bad as it could get, but the last time I had the motor out of my Chevelle it was sitting there in the garage (with no motor in it) and it still leaked!! (Evidently there was so much oil on the frame that it was dripping off). I am trying to do better... K
I currently use the neoprene, installed with the crank in place. No leaks, I installed that last October However, that replaced a rope seal that I put in during the summer of '99. That never leaked a drop. Neither did the front rope seal in the timing cover. You just need to pack them in really well so that when you trim, you'll get the right crush
WAAAAAYYYY off subject, but - - my son and I spent the morning together at an Air Show last week and he was telling me about a particular WWII airplane (I don't remember which) that used 37 GALLONS of oil per mission. The time in the air was actually limited by the oil capacity rather than the fuel range. :Smarty: He said one time there was a new pilot that hadn't flown this craft before was standing there when the tanker rolled up and started pumping through this big hose into the oil tank. The pilot went running out there trying to stop them because he thought they were putting fuel in the wrong location. They told him "..yeah buddy, 37 gallons, we're using the tank truck for this one"... :shock: Sorry 'bout that. Carry on.... :sleep: K
scavenger... moroso makes them as well as others...they are welded into your header collector flange and do virtually the same thing as a pcv by positively venting the crankcase but burn the vapor off in the exhaust rather than the engine....the fumes do not burn nearly as well as gasoline.... :Brow: Mark
