Join Date: Jun 2011
Location: somewhere south of civilization
Thanked 365 Times in 353 Posts
Rep Power: 8
Re: Find the oil leak
I don't think you can isolate an engine oil leak if the engine is not running unless it is the drain plug that is leaking.
First thing I'd check, once the engine was up to operating temp is the oil pressure. Is the needle where it always was? It's not necessarily an exact reading of the oil pressure, but like eng temp, any change from normal is to be noted. Way high oil pressure could indicate a blockage in the system.
Check the usual suspects like seals and pump gaskets, but if it's not easily seen then perhaps you have a problem with rings. If you have weak rings your crankcase pressure (not oil pressure) will build up and you can get oil leaking from some very unobvious places, like the dip stick. Also, in that case, you would have smoke coming out of the breather and exhaust at higher RPMs and load, so it should be apparent. To be certain, just place a finger over the dip stick hole and feel the pressure. You shouldn't feel much if you have no problem.
Some engine companies have gotten it right; a white or light colored engine make leak finding much easier.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.