Insane oil leak
 

Asking for a friend who just got his engine fired up after being built 3 years ago. Older motor Fired up with synthetic oil. Did a break in. lost over 2 courts of oil in just a couple hundred miles.

He has compression

sees oil on the threads of the plugs. I am thinking valve seals, how do you check this

Re: Insane oil leak
 

What kind of engine?

Re: Insane oil leak
 

.Pull one or both exhaust manifolds off and if it’s seals you’ll see oil crud on the valve stems right down on to the backside of the valves.

Re: Insane oil leak
 

2 quarts in a couple hundred miles . I would think it would be smoking pretty bad . Can’t see seals doing that much , my 68 327 uses oil and fouls the #1 plug regularly so I know the seals are bad but it doesn’t use that much and it hardly smokes at startup . Any plugs fouled?

Re: Insane oil leak
 

Did he break it in with synthetic oil? If so nothing broke in I would drain it put break in oil in it and redo the procedure.

Re: Insane oil leak
 

Pull a couple of the oily plugs. If the tips are also oil coated, could be the valve seals. But as mentioned, a normal sign of burning oil is blue exhaust smoke.

Another reason the outside of the spark plugs could be oily is leaking valve cover gaskets. But that much leakage should show up on the floor.

OEM valve covers or aftermarket? Some aftermarket skip the baffles for the PCV connections. No baffles could cause excessive oil consumption.

Re: Insane oil leak
 

on tv years ago guy had similar issue with a fresh rebuild on a corvette.. turns out the intake manifold was bad and it was sucking oil down the ports it was an episode of fantomworks

Re: Insane oil leak
 

thanks guys, going to try to do the break in again

Re: Insane oil leak
 

x2